Additions and Corrections to the List of Michigan Pentatomoidea (Hemiptera)

Six new species are added to the 1970 list of Michigan Pentatomoidea, and two are deleted

Effects of Various Photoperiods on Color and Pubescence in \u3ci\u3eThyanta Pallidovirens Accerra\u3c/i\u3e (Hemiptera: Pentatomidae)

The effects of a range of developmental photoperiods on adult dimorphism in Thyanta pallidovirens accerra were studied under laboratory conditions. Adults reared in photo- phases of 14L and higher had short pubescence and those in 12L and lower, long pu- bescence. No dimorphism in color was produced in these same photophases

Effects of Continuous and Split Developmental Photophases During Each 24 Hour Period on Adult Morphology in \u3ci\u3eEuschistus Tristigmus Tristigmus\u3c/i\u3e (Hemiptera: Pentatomidae)

Rearing immatures of Euschistus tristigmus tristigmus in 8L:16D, 8L: 4D:8L;4D, and 16L:8D showed that the length of each photophase, rather than an accumulated total of shorter photophases, during each 24 hr period was the determining factor in producing adult dimorphism in shoulder shape and number of midventral abdominal spots

Effects of Various Photoperiods on Color and Pubescence in \u3ci\u3eThyanta Calceata\u3c/i\u3e (Hemiptera: Pentatomidae)

Rearing immatures of Thyanta calceata in a Iange of photoperiods showed that a threshold photoperiod is involved in the adult dimorphic response (color and pubescence) with the mean threshold near 12.5L: 11.5D. This threshold is consistent with the seasonal distribution of the adult morphs

Life History of \u3ci\u3eNeoplea Striola\u3c/i\u3e (Hemiptera: Pleidae)

The life history of Neoplea striola was studied in southern Illinois during 1983-1985. This apparently univoltine species overwintered as adults and became active in early March. First instars appeared in mid-May followed by marked overlapping of the subsequent instars. No active adults were found after November

Noteworthy Range Extensions of Three Emesine Species (Heteroptera: Reduviidae)

The first records of Empicoris culiciformis and E. winnemana from Michigan and of Pseudometapterus umbrosus from Illinois are reported. All represent considerable extensions of their recorded ranges

An Overview of the Heteroptera of Illinois

A key to adults of all heteropteran families known to occur in Illinois is presented together with general information on the biologies of these families. Also included are general references on Heteroptera and on individual families, particularly if those references involve studies of fauna that were conducted in Illinois, adjacent states, or nearby parts of Canada

A List of the Scutelleroidea (Hemiptera) of Southern Illinois

A list of the Scutelleroidea of southern Illinois is presented with information on the state distribution of each species

Life History of \u3ci\u3eMesovelia Mulsanti\u3c/i\u3e (Hemiptera: Mesoveliidae) in Southern Illinois

The life history of Mesovelia mulsanti was studied during 1983-1986. This species was apparently trivoltine with a partial 4th generation at the end of the year. It overwintered as eggs. First ins tars appeared in mid-April followed by marked overlapping of the subsequent instars and generations. The first adults appeared in early May. No active individuals were found after November

Comparison of Two Population Sampling Methods Used in Field Life History Studies of \u3ci\u3eMesovelia Mulsanti\u3c/i\u3e (Heteroptera: Gerromorpha: Mesoveliidae) in Southern Illinois

A field life history study of Mesovelia mulsanti was conducted in south­ern Illinois, the results of which are compared with those from an earlier study also conducted in southern Illinois. The two studies differed in the collecting techniques used (quadrat sampler versus aquatic net). Results of the present study give a clearer picture of the life history of this insect be­ cause the quadrat sampler collected representative samples of nymphs and adults more effectively than the aquatic net and, thus, the quadrat samples more accurately represented the actual chronology of the annual generations