185 
THYANTA CUSTATOR Fabr. 
Cimex custator Fabricius, Syst. Rhyng., p. 164. 1803. 
This common and variable species is easily recognized by its peculiar 
granulate appearance, caused by the fine and’ dense punctuation. There 
are two extreme color-varieties. One is green, often with a red band 
between the humeri and red lateral border to the pronotum; the other is 
brownish fuscous, more or less dotted above and below with fuscous, 
and with a pale median line on the scutellum. There are so many inter- 
grades between these forms that a variety name is not considered neces- 
sary. The species is widely distributed over the United States. It feeds 
on asparagus, corn, and various grasses. Several examples of the dark 
variety were once captured by C. W. Woodworth on the top of a tower of 
the University of Illinois about 180 feet high. The species is moderately 
common in all parts of Illinois, especially on dry or sandy soils. The 
dates are distributed rather uniformly throughout the season. Collections 
in November and December indicate that hibernation in the adult stage 
is usual. Nymphs have been taken from May to July, but much, more 
abundantly from August to October. 
8. Pertpatus Muls. & Rey 
Kry To SPECIES 
Under surface and legs piceous, connexival pale border more or less invaded by 
large square black spots at incisures; [posterior margin of hypopygial opening 
AS win SNe ioc EL AG r ROV RMI ere coy tain be telelehalerovdharaie.s\ oie) is eve form Sleleysiis\s ++. piceus. 
Under surface and legs pale, connexivum with narrow pale border, line between 
this and the black discal color more or less sinuated outwardly on the inci- 
sures; [posterior margin of male hypopygial opening as in Figure 33]........ 
MN aMce ane eit se ertenctaistels ahora Biest en at oben iatneiats (sta ayehera ers o/e/'e a serne nies gM eerecevea.e limbolarius. 
PERIBALUS PICEUS Dall. 
Pentatoma? picea Dallas, List of Specimens of Hemip. Ins. in Coll. Brit. 
Mus., Pt. 1, p. 286. 1851. 
We have numerous specimens from northern Illinois (S. FL. Pea- 
body.). The species is rather rare, being listed from Canada, Montana, 
and Iowa. 
PERIBALUS LIMBOLARIUS Stal 
Peribalus limbolarius Stal, Enum. Hemip., Pt. 2, p. 34. 1872. 
This common species ranges across the United States and from 
Canada to Mexico. We haye it from numerous localities in all sections 
of the state. It is particularly a late-summer and fall species. We have 
taken it in January, March, April, and May, but especially from June 19, 
to November 7, the largest number of captures being in October. The 
nymphs were taken during the summer months. It feeds on goldenrod 
(Kirkaldy). At Urbana, October 26, the author found twenty-three 
imagines on a single cauliflower stalk with their beaks inserted, evidently 
sucking the sap. 
