A collection of spiders, taken from Dubuque County and neighboring counties in 1961, consisted of representatives of 13 families and 54 species

Kaufmann, Gerald W.

English

University of Northern Iowa

Proceedings of the Iowa Academy of ScienceVolume 69 | Annual Issue Article 841962Spiders of Dubuque CountyGerald W. KaufmannLoras CollegeCopyright © Copyright 1962 by the Iowa Academy of Science, Inc.Follow this and additional works at: https://scholarworks.uni.edu/piasThis Research is brought to you for free and open access by UNI ScholarWorks. It has been accepted for inclusion in Proceedings of the Iowa Academyof Science by an authorized editor of UNI ScholarWorks. For more information, please contact scholarworks@uni.edu.Recommended CitationKaufmann, Gerald W. (1962) "Spiders of Dubuque County," Proceedings of the Iowa Academy of Science: Vol. 69: No. 1 , Article 84.Available at: https://scholarworks.uni.edu/pias/vol69/iss1/841962] MIXED COLO'.\!IES IN ANTS 539 INa is a nest which probably originated by swarming from IN. but note that the percentage of hairless workers (75%) is quite different from that in the parent colony IN ( 42%). The mixed colonies are undoubtedly polygynous, with females of both species present but this explanation is hardly adequate. Trials have shown that alate Formica fossaceps females are not rejected by small aggregations of Formica obscuriventris clivia workers, and vice versa. Small groups of workers of the two species from different colonies will also work out a peaceful modus vivendi. Literature Cited l. King, R. L. 1949. Proc. Iowa Acad. Sci, 56: 367-370. 2. King, R. L. and R. M. Sallee. 1951. Proc. Iowa Acad. Sci 58: 487-489. 3. King, R. L. and R. ~L Sallee. 1952. Proc Iowa Acad. Sci. 59: 469-474. 4. King, R. L. 1955. Proc. Iowa Acad. Sci. 62: 509-513. 5. King, R. L. and R. M. Sallee. 19.57. Proc. Iowa Acad. Sci. 64: 667-669. 6. King, R. L. and R. M. Sallee. 1959. Proc. Iowa Acad. Sci. 66: 472-473. 7. King, R. L. and F. Walters. 1950. Proc. Iowa Acad. Sc.i. 57: 469-473. 8. Gosswald, K. and K. Bier. 1954. lnsectes Sociaux 1: 229-246. Spiders of Dubuque County GERALD w. KAUFMANN1 Abstract. A collection of spiders, taken from Dubuque County an<l neighboring counties in 1961, consisted of rep-resentatives of 13 families and 54 species. Between the years 1938 and 1944 a systematic collection of Iowa spiders was inaugurated by Karl Stiles and students at Coe College. In the interval between 1944 and the present, no pub-lished reports have been given on the distribution or taxonomy of Iowa spiders. Since the work of Stiles and his sh1dents was obviously incomplete, the author thought it worthwhile to add to this beginning in the classification and distribution of Iowa spiders. METHODS AND MATERIALS The spiders were caught during the spring, summer, and fall of 1961 in Dubuque and its neighboring counties. Most were caught by hand, since this afforded an opportunity for observa-tion of the type of web, which was an aid in the classification of the spider. A sweep net was used to cover wide areas or inac-cessible habitats as nettles or thistles. This usually obtained a 1 Department of Biology, Loras College, Dubuque, Iowa. 1Kaufmann: Spiders of Dubuque CountyPublished by UNI ScholarWorks, 1962540 IOWA ACADEMY OF SCIENCE [Vol. 69 large numbers of specimens. The spiders were then killed and preserved in alcohol. Classification of specimens was based primarily upon The Spider Book by J. H. Comstock ( 1948 ), with B. J. Kaston's How to Know the Spiders ( 1953) used as a supplement. A list of Wis-consin spiders by Herbert Levi and Howard Field ( 1954) and a list of Nebraska spiders by Leonard W orly and Gayle Pickwell ( 1927) were used as cross references to narrow down the pos-sibilities. These lists included a total of 395 species. The ranges of those found in both states could reasonably be expected to extend through Iowa. Records were kept on each specimen; the ecological habitat, location, date of capture, and sex of each spider recorded. Slightly over 200 spiders were classified, representing 54 dif-ferent species and 13 families. CLASSIFICATION The following list added 18 new species not found by Stiles. Family PHOLCIDAE Pho1cus phalangioides Spe-rmaphora meridionalis Family AMAUROFIIDAE Amauroblus bennetti Family DrcTYNIDAE Dictyna annu1ipes Family THERIDTIDAE Teutana triangulosa Steatoda boreaTis Theridhm tepidariorum Theridion frondeum The."idion studiosum Family ARGIOPIDAE Tetragnatha e1ongata Tet1·agnatha extensa Tetragnatha Taboriosa Tetragnatha f)eriformis Nephi/a cla,,ipes Arglope aurantia Argiope trifasciata Aranea gigas Aranea trifolium Aranea frondosa N eoscona arahesca M icrathena sagittafa Micrathena gracilis Micrathena reduviana Leucauge venusta Family AGELENIDAE Agelenopsis naevia Agelenopsis pennsyltianlca Cora• medicinalis Family PrsAURIDAE Dolomedes tenebrosus Pisaurina mira Family LYcosmAE Lycosa helluo J,ycosa frondicola Lycosa aspersa Lycnsa p1'atensi~ Lycosa punctulata Schizocosa crassipes Pardosa destinata Family GNAPHIDAE Gnanhosa ( iuv. ) Sosticus continentalis Family LINYPHTIDAE Linyphia marginata Family CLUBIONIDAE Aysha (iuv.) Family THOMISIDAE iUisumenops asperatus Mi911me11ops aleatorius P'1ilodromus pemix Ebo latithorax X ysticm transuersatus X u,c;ticus triguttatus Xysticus e1egans X ysticus funestua Family ATTIDAE Salticus scenictts M arpissa undata Walti mirata Phidippus audax Dendryphantes marginatus M ae'tlia vittata The spiders in this collection are deposited in the permanent spider collection at Loras College, Dubuque. It is hoped that further collection will be done by others to the still quite in-complete list of Iowa spiders. 2Proceedings of the Iowa Academy of Science, Vol. 69 [1962], No. 1, Art. 84https://scholarworks.uni.edu/pias/vol69/iss1/841962] SPIDERS OF DUBUQUE COUNTY 541 ACKNOWLEDGEMENTS The author is indebted to Professor Emmett Polder for assist-ance in this research and to Doctor Herbert Levi for examina-tion and verification of specimens. Space prohibits expression of appreciation to several relatives and fellow sudents who donated their time and services in gathering specimens for this collection. Literature Cited Comstock, ]. H. 1948. Ithaca, N. Y. The Spider Book. Comstock Publishing Co., Kaston, B. J. 1953. buque, Iowa. How to Know the Spiders. Wm. C. Brown Co., Du-Levi, H. W., and Field, H. Hl54. Am. Midland Naturalist 51:444-467. Stiles, K. 1938. Proc. Iowa Acad. Sci. 45:285-207. Stiles, K. 1940. Proc. Iowa Acad. Sci. 47:333-342. Stiles, K. 1944. Proc. Iowa Acad. Sci. 54:473-484. Worly, L., and Pickwell, G. Hl27. Univ. of Nebr. Studies 27:1-129. An Analysis of Mite Populations m Muskrat Houses 1 ROBERT A. BucKLEY:) AND ELLIS A. HrcKs3 Abstract. During the summers of 1960 and 1961, samples of material from muskr<•t houses in Goose Lake, Hamilton County, Iowa, were analyzed for their acarine content to ob-tain information on the factors influencing the composition of mite populations. Heprescntatives of 18 different families or groups were obtained. Their ecology is discussed from the following relationships: ( 1) immediately available flora and composition of muskrat houses, ( 2) size of houses and occurrence of mites, I 3) utility of houses and occurrence of mites, ( 4) sampling area of houses and occurrence of mites, and ( 5) the mite populations themselves. INTRODUCTION Houses for the muskrat, Ondntra zibethicus ( L.), afford op-portunities for studying an interesting complex of mite popula-tions. The profuse organic material, both of plant and animal origins and in varying degrees of decay and wetness, constitutes an abundant food supply for detritus feeders. These are utilized by predaceous mites, some of which, in turn, are preyed upon by other mites. The area chosen for study was Goose Lake, located one-half mile east of Jewell, Iowa, in Hamilton County. This lake, private-t This sh1dy was supported in part by the National Science Foundation in its 1960 and 1961 Summer Institutes for Research Participation for Teacher Training, • Biology Instructor, Lincoln High School, Webster City, Iowa. a Department of Zoology and Entomology, Iowa State University, Ames, Iowa. 3Kaufmann: Spiders of Dubuque CountyPublished by UNI ScholarWorks, 1962

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Spiders of Dubuque County

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