192 
19; 
20. 
Die 
22: 
, 
24. 
ILLinois NATURAL History SURVEY BULLETIN 
Pronotal disk uniformly deep black, 
with a narrow, pale area at basal 
margin; scutellum yellowish, with 
an oblique, black mark on either 
side of median line beginning at 
middle of disk and extending to 
margin at a point slightly beyond 
middlcay aot nigricollis, p. 197 
Pronotal disk pale grayish to very 
deep gray, always paler on middle 
and never deep Diack aces 20 
Scutellum with distinct black mark on 
either side of apical half extending 
from lateral margin obliquely ceph- 
alad to near middle of disk........ o1 
Scutellum with black spot at margin 
on either side of apical half, this 
mark scarcely longer than broad, 
at most not extending more than 
halfewayetosmicdicrolcdisk ee eee 24 
Pale areas at lower margins of pro- 
pleura extending upon sides of ster- 
num; hind femora mostly black ex- 
cept at base; pale spots small, 
largest spot not wider than narrow 
pale band located slightly beyond 
midcdierotvapical alizes aeons. 
Wa LE ee husseyi, p. 199 
Pale areas at lower margins of pro- 
pleura not extending upon sides of 
sternuniy fea eb eee DD: 
Hind femora of female with large ir- 
regular pale spots on anterior face, 
these spots connected by a longi- 
tudinal, almost colorless bar which 
does not attain subapical pale band; 
length 7.30—-7.60....onustus, p. 194 
Hind femora of female with small 
spots; without distinct, longitudinal 
pale’ baron anterior facet 24,2. a. ee ia 
Membrane with infuscation on cen- 
tral area tending to separate into 
small specks; front of head with 
black, transverse striations on either 
Side Gfmedianeline 4pm. ae ee 
Rune iy sewer neglectus, p. 194 
Membrane more uniformly infuscated, 
color not separating into small 
specks; front of head without dis- 
tinct, black striations even when 
hemelytra are very dark; reddish 
lines usually evident on frons..... 
ek, CR ees, ee spicatus, p. 196 
Hind femora with distinct white band 
placed slightly beyond middle of 
apical half, and usually with large, 
50: 
Vol. 22, Art. I 
light-colored spots near middle... .25 
Hind femora without distinct white 
band on apical half; light-colored 
spots usually rather small........ 27 
. Second antennal segment black except 
at base, dorsal aspect not distinctly 
paler; scutellum and clavus clothed 
with erect black hairs intermixed 
with prominent white, silky pubes- 
CenCe wv) oka buenoi, p. 197 
Second antennal segment distinctly 
almost white or yellowish on dorsal 
aspect, darker at apex and on area 
bordering light-colored basal an- 
nulus......... 0.45 seen 26 
26. Propleura mostly black, only lower 
margin white; tibiae with distinct 
light-colored and black bands..... 
ie poe canadensis, p. 193 
Propleura mostly pale, with a longi- - 
tudinal, black ray crossing coxal 
cleft; tibiae light to dusky, not 
banded Sy arundinicola, p. 198 
. Cortum with very heavy, triangular 
black mark set obliquely across apex; 
hind femora with two or three large 
white spots on dorsal surface; cun- 
eus usually reddish. .erectus, p. 199 
Corium with light, almost interrupted 
fuscous mark set obliquely across 
apex; hind femora with small white 
spots only; cuneus rarely if ever red- 
dish=) scar brevifurcatus, p. 194 
28. Apical half of corium distinctly green- 
ish; second antennal segment black 
with pale annulus at base........ 
BPE NS penipecten, p. 199 
No part of corium distinctly green. . .29 
. Hemelytra more brownish than black; 
dark color on apical area of cortum 
and on middle of clavus broken into 
small spots......... 73 30 
Hemelytra sometimes brownish, but 
usually black; dark area not dis- 
tinctly broken into small spots... .31 
Second antennal segment uniformly 
black except for pallid annulus at 
base; vertex narrow, its width less 
than dorsal width of an eye....... 
eligi rt 2 See ae schotti, p. 197 
Second antennal segment chiefly yel- 
lowish brown, black at apex and on 
area bordering pallid basal annulus; 
vertex wider, equal to dorsal width 
of an €ye;. ua. cee salicis, p. 196 
