194 
One of the commonest species in Illinois ; generally distributed. Found 
in the imago stage throughout the year. 
EUSCHISTUS VARIOLARIUS P. B. 
Pentatoma variolaria Palisot de Beauvois, Ins. rec. en Afr. et en Amér., p. 
149. 1805. 
This species is found almost everywhere in the United States and 
Canada, being especially abundant in the Northern States. It is the com- 
monest species of the genus in Illinois, and is found in the imago stage 
throughout the year in all parts of the state. 
The variety with black dots on lateral margins of abdomen included 
in the key is represented in our collection by three males and two females. 
Four of these are Illinois specimens, the locality labels reading, Ottawa, 
Carbondale, Dubois, and “N. Ill.” One male is without label. The three 
specimens bearing dates were taken in July. Mr. W. L. McAtee has 
specimens of this variety from Riverhead, N. Y., West Cornwall and 
Westport, Conn., and from Mendham, N. J. 
EUSCHISTUS ICTERICUS Linn. 
Cimezx ictericus Linné, Cent. Ins. Rar., p. 16. 1763. 
Found in the northern United States and Canada across the whole 
of the continent. 
Our Illinois specimens are from Channel Lake, Beach, Cedar Lake, 
Algonquin, Lake Villa, La Prairie, and Urbana. The dates range from 
June 19 to August 14. We also have one specimen from Nantucket 
Island, Mass. ; 
19. Hymenarcys A. &S. 
Key To SPECIES 
Sides of thorax straight or slightly concave; lateral angles subacute; veins of 
membrane rarely anastomosing; spiracles distant from ventral margin about 
1/2 length of segment; length 6.5-8 mm.............5. 0000 ceeeeeeen aequalis. 
Sides of thorax evenly arcuate, lateral angles broadly rounded; veins of mem- 
brane freely anastomosing; spiracles distant from ventral margin about 3/4 
lenpth of segment: leneth 8:5—LOntmMie oes. eas eae fhe ve pe aoe nervosa. 
HyYMENARCYS AEQUALIS Say 
Pentatoma aequalis Say, Descrip. n. sp. Heter. Hemip. N. A., 1831; Compl. 
Writ. Ent. N. A., Vol. 1, p. 319. 
This species tends to be somewhat southern in distribution, ranging 
from New York to Colorado and Montana and southward. It is quite 
abundant in southern and central Illinois, but there are very few records 
of it for the northern part of the state. Nymphs have been taken from 
May to August. We have -taken the imagines in all the months from 
February to December, most abundantly from July to November. An 
imago was taken April 19 by E. O. G. Kelly under a corn husk. 
