86 IOWA STUDIES IN NATURAL HISTORY 
Ordinarily, during the summer, fields of red clover and tim- 
othy are favorite haunts of this bug and most of our specimens 
have been taken in such situations. A long list of food plants 
is known and on account of its large size and great numbers it 
frequently does some injury to infested plants. Forbes says 
(l. c.), “We have repeatedly found it on corn, sucking sap from 
the leaves, from the husks and kernels at the tip of the ear, and 
from other parts of the plant. . . . We have also taken the 
adults on rye, red clover, broom corn, oats, thistle, grasses and 
flowers; and they have been reported to eat tomatoes, red rasp- 
berries, peaches, mullein, and Thermopsis.’’ lLugger (Rept. 
Minn. Exp. Sta., VI, 1900, 91) reports this insect as destructive 
to asparagus and wheat. I have found both nymphs and adults 
very common on red clover at lowa City in June. Usually the 
bugs attack the plants down near the bases on the less tough and 
more delicate leaves and stems. I have also taken the adults 
often on potato, ragweed (Ambrosia artemisufolia Linn.) and 
burdock (Arctium minus Bernh.). In addition, the species is 
said to feed on lepidopterous larvae and upon the cottony maple 
scale (Pulvinaria innumerabilis Rathy.). 
Euschistus ictericus (Linnaeus) 
1763. Cimez ictericus Linnaeus, Cent. Ins., 16. 
1763. Cimez ictericus Linn., Amoen. Acad., VI, 399. 
1767. Cimex ictericus Linn., Syst. Nat., XII, 719. 
1805. Pentatoma rubro-fusca Pal. Beauy., Ins. Afr. Amér., 185, Hém., Pl. 11, 
fig. 3. 
1851. Euschistus cognatus Dallas, List Hem., I, 204. 
1872. Euschistus ictericus Stal, Svensk. Vet. Handl., 10, no. 4, 26. 
1904. Euschistus ictericus Yan Duzee, Trans. Am. Ent. Soc., XXX, 4T. 
General form as in E. variolarius but averaging a little more slender. 
Color pale grayish to reddish yellow, a little more finely punctate with 
black than E. variolarius. Tylus usually slightly longer than juga. Hu- 
meral angles strongly spinous and acute, more produced than in E. vari- 
olarius ; a transverse, impunctate calloused line, more or less sinuate in the 
middle, connects the humeri; pronotum behind this keel more or less rugose. 
Scutellum closely punctured. Hemelytra a little more sparsely punctured; 
furnished with a few small groups of closely set punctures. Venter im- 
punctate except along margins but finely, regularly, aciculate and more or 
less flecked with red as are also the ventral thoracic plates. Margins of 
abdomen without black points; last ventral segment of male without black 
spot. A black dot at the base of each coxal cavity and in addition one 
near the middle of the mesostethus. Other characters as in £. variolarius. 
This form is closely allied to #. variolarius and to avoid 
