66 ILtino1s NATURAL History SURVEY BULLETIN 
median portion of disk black, broad pale 
areas with dark punctures present at lateral 
margins; propleura very dark brown, lower 
margins pale. Scutellum black, basal angles 
paler; minutely, sparsely pubescent. Hem- 
elytra glabrous, pale, translucent and 
marked with fuscous, but without large 
spots on basal half as in venatorius; clavus 
black on either side of commissure, slender 
dark markings bordering claval veins; cori- 
um with punctures; radius, and large spot 
on inner apical angle, dark fuscous to black; 
embolium scarcely darkened at apex, ex- 
treme outer edge black, width 2.50. Cuneus 
pale, translucent, inner apical margin black- 
ish. Membrane pale, smoky within areoles, 
veins slightly darker, a fuscous mark border- 
ing apical margin of larger areole. Legs 
pale and marked with black; femora with 
apical half marked and spotted with black, 
an irregular pale but spotted subapical an- 
nulus; tibiae with four paler bands but more 
or less interrupted with dark spots, pubes- 
cence short, not attaining length of true 
spines. Venter pale greenish with reddish 
marks. 
FEMALE.—Length 7.40, width 2.77; very 
similar to male in coloration, but differs in 
pilose character of antennae. 
Hasits.—This species occurs on the bark 
of willow trees where it may be predacious 
on aphids and other small insects. 
Known  DistrisuTIon. — Illinois, Iowa, 
Kansas, Minnesota, Mississippi, Nebraska, 
Oklahoma, South Dakota, Texas. 
Illinois Records.—Five males and 8 fe- 
males, taken June 17 to Sept. 7, are from 
Alton, Chicago, Galesburg, Havana, Law- 
renceville, Metropolis, Mount Carmel, 
Rosiclare, Savanna. 
Eustictus filicornis (Walker) 
Capsus filicornis Walker (1873, p. 96). 
Megacoelum grossum Uhler (A887, p. 70). 
Not taken in Illinois; known from Dis- 
trict of Columbia, Florida, Maryland, Mas- 
sachusetts, New Jersey, New York, Penn- 
sylvania, Virginia; occurs on yellow pine 
(Pinus echinata). 
Eustictus venatorius Van Duzee 
Eustictus venatorius Van Duzee (1912, p. 
Not taken in Illinois; known from New 
York, where it occurs on hickory trees. 
Vol. 22; Arr 
Eustictus necopinus Knight 
Eustictus necopinus Knight (1923d, p. 481). 
Not taken in Illinois; known from British 
Columbia, District of Columbia, Massa- 
chusetts, New York, Ontario; occurs on 
aspen. 
Deraeocoris Fieber 
KEY TO GROUPS AND 
SUBGENERA 
1. Claws not cleft or only slightly cleft, 
fig 342 2c Group C, p. 72 
Claws deeply cleft near base, figs. 33 
Sb. be ices bis. dee aa Z 
2.. Scutellum punctate. 2 eeeneaee Group 
A, Subgenus Camptobrochis, p. 66 
Scutellum impunctates =. (ase 3 
3. Dorsum practically glabrous, at most 
only sparsely and finely pubescent 
(not rubbed specimens), rarely with a 
few hairs at anterior angle of pro- 
notum; hind tibiae with a row of 
spines or heavily chitinized hairs on 
anterior face... eee Group B, p. 69 
Dorsum heavily pubescent or hairy, at 
least with long hairs at anterior 
angles of pronotum; hind tibiae 
without distinct spines on anterior 
face, usually closely set with promi- 
nent long hairs...) eee Group 
D, Subgenus Euarmosus, p. 73 
Group A 
KEY TO SPEGIES 
1. Dorsum bright red; clavus, a pair of 
large spots on corium and pronotum 
black] ...) 23.447 See histrio, p. 69 
Dorsum not red and black as above... 2 
2. Cuneus red or stained with reddish; 
membrane hyaline or with only a 
fuscous spot at apex, or a point either 
side of middle... .... = a= S 
Cuneus infuscated or marked with 
black, rarely reddish; if reddish, 
membrane distinctly black; mem- 
brane usually heavily marked with 
fuscous; if not, cuneus without a 
trace of reddish.....) )aee 4 
3. Length of second antennal segment not 
equal to length of pronotum; two 
fuscous spots on apical half of mem- 
brane, darkest specimens developing 
