A list of the 20 species and subspecies of Pachybrachis contained in the collections of the Illinois Natural History Survey and Southern Illinois University, and the author\u27s personal collection, is presented, with recorded ecological data and county distribution records where known

Barney, Robert J

English

ValpoScholar

The Great Lakes Entomologist 
Volume 17 
Number 3 - Fall 1984 Number 3 - Fall 1984 Article 5 
October 1984 
Records of Pachybrachis in Illinois (Coleoptera: Chrysomelidae) 
Robert J. Barney 
University of Kentucky 
Follow this and additional works at: https://scholar.valpo.edu/tgle 
 Part of the Entomology Commons 
Recommended Citation 
Barney, Robert J. 1984. "Records of Pachybrachis in Illinois (Coleoptera: Chrysomelidae)," The Great Lakes 
Entomologist, vol 17 (3) 
Available at: https://scholar.valpo.edu/tgle/vol17/iss3/5 
This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. 
It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. 
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1984 THE GREAT LAKES ENTOMOLOorST 137 
RECORDS OF PACHYBRACHIS IN ILLINOIS 
(COLEOPTERA: CHRYSOMELIDAE) I 
Robert J. Barnel 
ABSTRACT 
A list 
of the 20 species and subspecies of Pachybrachis contained in the collections of 
the Illinois Natural History Survey and Southern Illinois University, and the uthor's 
personal collection, is presented, with recorded ecological data and county distribution 
records where known. 
The 
last 
comprehensive treatment of the genus Pachybrachis was by Fall (1915). 
Balsbaugh ( 1973) and Balsbaugh and Tucker (1976) reviewed certain species groups, and 
Balsbaugh and Hays (1972) have recognized new synonymies, but much work remains to 
be done. Riley and Enns (1970) stated in their checklist of Missouri Chrysomelidae that 
.'this is the largest and undoubtedly one of the most difficult North American chrysomelid 
genera with many of the species being quite indistinct." 
The data 
presented are from specimens 
examined by the author in the Ill ois Natural 
History Sun'ey and Southern Illinois University collections, and the private collection of 
the author. This list records 20 species and subspecies of Pachybrachis collected in 
Illinois. 
Family CHRYSOMELIDAE 

Subfamilv CRYPTOCEPHALINAE 

Genus PACHYBRACHIS 
Chevrolet 

atomarius i ~rdsheimer) 1847. May to August. (Fig. 2), The Christian County specimens 
were collected from Rhus glabra L. and the Jersey County specimens from Am rpha 
canescens Pursh. Fall (1915) commented that atomarius varies from the extremc of 
being almost entirely black to examples where yellow is the predominant color. 
biritta1lis ISaYI 182.+. (Fig. 3). May to july. This species has been repeatedly collected by 
sweeping Salix spp. 
hepaticlis I.\klsheimer) 1847. (Fig, 4). June through August. 
illlpums Suffrian 1853. (Fig. 5). May through July. This species was collected in native 
prairie habitat. principally hill prairies. 
luridl/5 I Fabricius I 1798. (Fig, 6). May through July. The Calhoun and Mo roe County 
specimens were collected on Ceallorhus americallus L. and the Maso County 
specimens on A.morp/za cal1escells Pursh. This species was collected in native prairie 
habitat remnants. 
lIl-uirmlll1 I.\lelsheimerl 1847. (Fig, 7), May to July. 
nigricomis alltolyells Fall 1915. (Fig. 8). May through July. A series of 48 specimens 
were colle.::ted on Deslllodil/l/l in Monroe County. These Illinois records represent the 
'This pubJi.::ati.'n is a contribution of the Illinois Natural History Survey and Illinois Agricultural 
E"periment Static'n. College of Agriculture, University of Illinois at Urbana-Champaign, supported 
in 
part 
by tedera; funds tl\)m the Environmental Protection Agency under Grant L 800 146, The 
content' do not necessarily retlect the yiews and policies of the Environmental Protection Agency, 
nor doe, memil'n c'f tnde or commercial products constitute endorsement or recommendation for 
uSe. 
CDepartmem l'f En!0mology. Cniwrsity of Kentucky, Lexington, K Y 40546.
1
Barney: Records of Pachybrachis in Illinois (Coleoptera: Chrysomel
Published by ValpoScholar, 1984
138 THE GREAT LAKES ENTOMOLOGIST Vol. 17, No.3 
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The Great Lakes Entomologist, Vol. 17, No. 3 [1984], Art. 5
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1984 THE GREAT LAKES ENTOMOLOGIST 139 
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Barney: Records of Pachybrachis in Illinois (Coleoptera: Chrysomel
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1984 THE GREAT LAKES ENTOMOLOGIST 141 
eastern-most range of this subspecies in the United States, according to Balsbaugh and 
Tucker's (1976) taxonomic revision. These specimens were all collected on hill prairies 
which possess the dry habitat that Balsbaugh and Tucker reported autoly us prefers. 
Iligricornis earbollarills (Haldeman) 1849. (Fig. 9). May to July. Some of the Calhoun 
County specimens were collected on Amorpha eanescens Pursh., and some of the 
Marion County specimens were taken from Desmodium sp. 
obsoletus Suffrian 1853. (Fig. 10). May through August. The Bond, Champaign. Fayette, 
Kane. and Kankakee County specimens were collected on Salix spp. 
othollus ot/WIllIS (Say) 1825. (Fig. II). May to August. Three McHenry County 
specimens were taken from Petalostemun purpureum (Vent.) Rydb. 
peecans Suffrian 1853. (Fig. 12). April to September. This species has been repeatedly 
collected from Salix spp. When discussing peccans, Fall (1915) stated that " ... it 
approaches so closely to diversus and abdominalis in some of its paler forms as to make 
distinction purely discretional." I have collected from a single willow tree a series of 
specimens that exhibit the range of dark to light coloration referred to above. 
pectoralis :'.lelsheimer 1847. (Fig. 13). May through September. The Alexander, Coles, 
and :\ladison County specimens were collected on Robinia pseudoacacia L., the 
Christian County specimen on Rhus glabra L., the Jasper County specimen on Corylus 
americana \VaIL some of the Lawrence, Marshall, and Vermilion County specimens 
on Quercus spp .. and some of the Marion and Piatt County specimens on Glenditsia 
spp. 
praeclants rWeise) 1913. (Fig. 14). May to July. The specimens were all collected in 
natlye hill prairie habitats. 
pubescens IOli"vierl 1808. One specimen was taken in Greene County, 23 May 1950. 
relictus Fall 1915. (Fig. 15). May through August. The Cumberland County specimen 
was collecrcd on Hypericum prolifkum L This speeies is found in native prairie 
remnants. 
spumarius Suffrian 1853. (Fig. 16). April to September. The Christian, Franklin, and 
Greene Counry specimens were collected from Rhus glabra L. The Lawrence County 
specimens were from Quercus alba L. and the Mason County specimen from Quercus 
marilalldica :'.Iuench. 
5
Barney: Records of Pachybrachis in Illinois (Coleoptera: Chrysomel
Published by ValpoScholar, 1984
142 THE GREAT LAKES ENTOMOLOGIST Vol. 17, No.3 
FOG. 15 

6
The Great Lakes Entomologist, Vol. 17, No. 3 [1984], Art. 5
https://scholar.valpo.edu/tgle/vol17/iss3/5
1984 THE GREAT LAKES ENTOMOLOGIST 143 
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144 THE GREAT LAKES ENTOMOLOGIST Vol. 17, No.3 
subfasciatus LeConte 1824. (Fig. 17). April to June. This species has been collected only 
from the southern half of the state. 
tridens (Melsheimer) 1847. (Fig. 18). June and July. The Coles and Sangamon County 
specimens were collected from Carya spp. 
trinotatus (Melsheimer) 1847. June to August. (Fig. 19). 
turbidus LeConte 1880. One specimen was collected in Monroe County, 17 June 1981. 
The author collected this specimen on a hill prairie of the Mississippi River. This may 
be 
the eastern-most record of this species 
in the United States. 
ACKNOWLEDGMENTS 
Appreciation is extended to Dr. Edward U. Balsbaugh, Jr., of North Dakota State 
University, for many species determinations, and Dr. John McPherson of Southern 
Illinois University and Mr. John Bouseman of the Illinois Natural History Survey for their 
loan of specimens. 
LITERATURE CITED 
Balsbaugh, E. U., Jr. 1973. Geographical variation in Pachybrachis othonus (Coleoptera: 
Chrysomelidae) with a desdiption of a new species. Ann. Entomol. Soc. Amer. 
66:252-261. 
Balsbaugh, E. U., Jr., and K. L. Hays. 1972. The leaf beetles of Alabama (Coleoptera: 
Chrysomelidae). Alabama Agric. Exp. Sta. Bull. No. 441:1-223. 
Balsbaugh, E. U., Jr., and W. L. Tucker. 1976. Geographical variation in Pachybrachis 
nigricornis (Coleoptera: Chrysomelidae). Coleopt. Bull. 30: 117-131. 
Fall, H. C. 1915. A revision of the North American species of Pachybrachis. Trans. 
Amer. Entomol. Soc. 41:291-486. 
Riley, E. G., and W. R. Enns. 1979. An annotated checklist of Missouri leaf beetles 
(Coleoptera: Chrysomelidae). Trans. Missouri Acad. Sci. 13:53-83. 
8
The Great Lakes Entomologist, Vol. 17, No. 3 [1984], Art. 5
https://scholar.valpo.edu/tgle/vol17/iss3/5

Records of \u3ci\u3ePachybrachis\u3c/i\u3e in Illinois (Coleoptera: Chrysomelidae)

Robert J Barney

Crossref

 in Illinois (Coleoptera: Chrysomelidae)

Valparaiso University

The Great Lakes Entomologist Volume 17 Number 3 - Fall 1984 Number 3 - Fall 1984 Article 5 October 1984 Records of Pachybrachis in Illinois (Coleoptera: Chrysomelidae) Robert J. Barney University of Kentucky Follow this and additional works at: https://scholar.valpo.edu/tgle Part of the Entomology Commons Recommended Citation Barney, Robert J. 1984. "Records of Pachybrachis in Illinois (Coleoptera: Chrysomelidae)," The Great Lakes Entomologist, vol 17 (3) Available at: https://scholar.valpo.edu/tgle/vol17/iss3/5 This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. For more information, please contact a ValpoScholar staff member at scholar@valpo.edu. 1984 THE GREAT LAKES ENTOMOLOorST 137 RECORDS OF PACHYBRACHIS IN ILLINOIS (COLEOPTERA: CHRYSOMELIDAE) I Robert J. Barnel ABSTRACT A list of the 20 species and subspecies of Pachybrachis contained in the collections of the Illinois Natural History Survey and Southern Illinois University, and the uthor's personal collection, is presented, with recorded ecological data and county distribution records where known. The last comprehensive treatment of the genus Pachybrachis was by Fall (1915). Balsbaugh ( 1973) and Balsbaugh and Tucker (1976) reviewed certain species groups, and Balsbaugh and Hays (1972) have recognized new synonymies, but much work remains to be done. Riley and Enns (1970) stated in their checklist of Missouri Chrysomelidae that .'this is the largest and undoubtedly one of the most difficult North American chrysomelid genera with many of the species being quite indistinct." The data presented are from specimens examined by the author in the Ill ois Natural History Sun'ey and Southern Illinois University collections, and the private collection of the author. This list records 20 species and subspecies of Pachybrachis collected in Illinois. Family CHRYSOMELIDAE Subfamilv CRYPTOCEPHALINAE Genus PACHYBRACHIS Chevrolet atomarius i ~rdsheimer) 1847. May to August. (Fig. 2), The Christian County specimens were collected from Rhus glabra L. and the Jersey County specimens from Am rpha canescens Pursh. Fall (1915) commented that atomarius varies from the extremc of being almost entirely black to examples where yellow is the predominant color. biritta1lis ISaYI 182.+. (Fig. 3). May to july. This species has been repeatedly collected by sweeping Salix spp. hepaticlis I.\klsheimer) 1847. (Fig, 4). June through August. illlpums Suffrian 1853. (Fig. 5). May through July. This species was collected in native prairie habitat. principally hill prairies. luridl/5 I Fabricius I 1798. (Fig, 6). May through July. The Calhoun and Mo roe County specimens were collected on Ceallorhus americallus L. and the Maso County specimens on A.morp/za cal1escells Pursh. This species was collected in native prairie habitat remnants. lIl-uirmlll1 I.\lelsheimerl 1847. (Fig, 7), May to July. nigricomis alltolyells Fall 1915. (Fig. 8). May through July. A series of 48 specimens were colle.::ted on Deslllodil/l/l in Monroe County. These Illinois records represent the 'This pubJi.::ati.'n is a contribution of the Illinois Natural History Survey and Illinois Agricultural E"periment Static'n. College of Agriculture, University of Illinois at Urbana-Champaign, supported in part by tedera; funds tl\)m the Environmental Protection Agency under Grant L 800 146, The content' do not necessarily retlect the yiews and policies of the Environmental Protection Agency, nor doe, memil'n c'f tnde or commercial products constitute endorsement or recommendation for uSe. CDepartmem l'f En!0mology. Cniwrsity of Kentucky, Lexington, K Y 40546.1Barney: Records of Pachybrachis in Illinois (Coleoptera: ChrysomelPublished by ValpoScholar, 1984138 THE GREAT LAKES ENTOMOLOGIST Vol. 17, No.3 2The Great Lakes Entomologist, Vol. 17, No. 3 [1984], Art. 5https://scholar.valpo.edu/tgle/vol17/iss3/51984 THE GREAT LAKES ENTOMOLOGIST 139 3Barney: Records of Pachybrachis in Illinois (Coleoptera: ChrysomelPublished by ValpoScholar, 1984140 THE GREAT LAKES ENTOMOLOGIST Vol. 17, No.3 4The Great Lakes Entomologist, Vol. 17, No. 3 [1984], Art. 5https://scholar.valpo.edu/tgle/vol17/iss3/51984 THE GREAT LAKES ENTOMOLOGIST 141 eastern-most range of this subspecies in the United States, according to Balsbaugh and Tucker's (1976) taxonomic revision. These specimens were all collected on hill prairies which possess the dry habitat that Balsbaugh and Tucker reported autoly us prefers. Iligricornis earbollarills (Haldeman) 1849. (Fig. 9). May to July. Some of the Calhoun County specimens were collected on Amorpha eanescens Pursh., and some of the Marion County specimens were taken from Desmodium sp. obsoletus Suffrian 1853. (Fig. 10). May through August. The Bond, Champaign. Fayette, Kane. and Kankakee County specimens were collected on Salix spp. othollus ot/WIllIS (Say) 1825. (Fig. II). May to August. Three McHenry County specimens were taken from Petalostemun purpureum (Vent.) Rydb. peecans Suffrian 1853. (Fig. 12). April to September. This species has been repeatedly collected from Salix spp. When discussing peccans, Fall (1915) stated that " ... it approaches so closely to diversus and abdominalis in some of its paler forms as to make distinction purely discretional." I have collected from a single willow tree a series of specimens that exhibit the range of dark to light coloration referred to above. pectoralis :'.lelsheimer 1847. (Fig. 13). May through September. The Alexander, Coles, and :\ladison County specimens were collected on Robinia pseudoacacia L., the Christian County specimen on Rhus glabra L., the Jasper County specimen on Corylus americana \VaIL some of the Lawrence, Marshall, and Vermilion County specimens on Quercus spp .. and some of the Marion and Piatt County specimens on Glenditsia spp. praeclants rWeise) 1913. (Fig. 14). May to July. The specimens were all collected in natlye hill prairie habitats. pubescens IOli"vierl 1808. One specimen was taken in Greene County, 23 May 1950. relictus Fall 1915. (Fig. 15). May through August. The Cumberland County specimen was collecrcd on Hypericum prolifkum L This speeies is found in native prairie remnants. spumarius Suffrian 1853. (Fig. 16). April to September. The Christian, Franklin, and Greene Counry specimens were collected from Rhus glabra L. The Lawrence County specimens were from Quercus alba L. and the Mason County specimen from Quercus marilalldica :'.Iuench. 5Barney: Records of Pachybrachis in Illinois (Coleoptera: ChrysomelPublished by ValpoScholar, 1984142 THE GREAT LAKES ENTOMOLOGIST Vol. 17, No.3 FOG. 15 6The Great Lakes Entomologist, Vol. 17, No. 3 [1984], Art. 5https://scholar.valpo.edu/tgle/vol17/iss3/51984 THE GREAT LAKES ENTOMOLOGIST 143 7Barney: Records of Pachybrachis in Illinois (Coleoptera: ChrysomelPublished by ValpoScholar, 1984144 THE GREAT LAKES ENTOMOLOGIST Vol. 17, No.3 subfasciatus LeConte 1824. (Fig. 17). April to June. This species has been collected only from the southern half of the state. tridens (Melsheimer) 1847. (Fig. 18). June and July. The Coles and Sangamon County specimens were collected from Carya spp. trinotatus (Melsheimer) 1847. June to August. (Fig. 19). turbidus LeConte 1880. One specimen was collected in Monroe County, 17 June 1981. The author collected this specimen on a hill prairie of the Mississippi River. This may be the eastern-most record of this species in the United States. ACKNOWLEDGMENTS Appreciation is extended to Dr. Edward U. Balsbaugh, Jr., of North Dakota State University, for many species determinations, and Dr. John McPherson of Southern Illinois University and Mr. John Bouseman of the Illinois Natural History Survey for their loan of specimens. LITERATURE CITED Balsbaugh, E. U., Jr. 1973. Geographical variation in Pachybrachis othonus (Coleoptera: Chrysomelidae) with a desdiption of a new species. Ann. Entomol. Soc. Amer. 66:252-261. Balsbaugh, E. U., Jr., and K. L. Hays. 1972. The leaf beetles of Alabama (Coleoptera: Chrysomelidae). Alabama Agric. Exp. Sta. Bull. No. 441:1-223. Balsbaugh, E. U., Jr., and W. L. Tucker. 1976. Geographical variation in Pachybrachis nigricornis (Coleoptera: Chrysomelidae). Coleopt. Bull. 30: 117-131. Fall, H. C. 1915. A revision of the North American species of Pachybrachis. Trans. Amer. Entomol. Soc. 41:291-486. Riley, E. G., and W. R. Enns. 1979. An annotated checklist of Missouri leaf beetles (Coleoptera: Chrysomelidae). Trans. Missouri Acad. Sci. 13:53-83. 8The Great Lakes Entomologist, Vol. 17, No. 3 [1984], Art. 5https://scholar.valpo.edu/tgle/vol17/iss3/5

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Records of \u3ci\u3ePachybrachis\u3c/i\u3e in Illinois (Coleoptera: Chrysomelidae)

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