184 
Ittinotis NaturAL History SURVEY BULLETIN 
KNown DistriBUTION.—Connecticut, 
Illinois, Kansas, New York, Ohio. 
Illinois Record.—NortTHERN ILLINOIS: 
Dine at O a 
Phytocoris 
Fallen 
KEY TO GROUPS 
1. Wing membrane confusedly sprinkled 
with discolored or dark spots, or with 
numerous, minute, pale spots; me- 
dian lobe of male genital structure 
provided with a flagellum that lacks 
distinct teeth, fig. 175.Group I, p. 184 
TES! 
174 
_Fig. 173.—Head and first antennal segment 
of Phytocoris lastomerus. 
Fig. 174.—Head and first antennal segment 
of Phytocoris conspurcatus. 
Wing membrane marbled, uniformly 
dark brown or uniformly light col- 
ored, never with many minute spots 
(except perhaps in some forms of 
guercicola); margins of dark areas of 
membrane sometimes separating 
into small specks, but general effect 
more mottled than spotted; median 
lobe of male genital structure with a 
flagellum bearing distinct teeth, figs. 
LGA 3. fk aaa ne reek tice Sitesi 2 
. Length of first antennal segment less 
than owidthroteherd ke eee ae ee 3 
Length of first antennal segment great- 
er, thanswidth ofshead.s...., wae eae 4 
. First segment of antennae red with 
vellow spots...... Group IV, p. 201 
First segment of antennae not red 
with yellow spots, but yellow, yellow 
with dark spots or brown to almost 
blacks is. ee Group III, p. 199 
Vol. 22, Art. I 
4. Antennae more black or fuscous than 
pallid; if second segment has a broad, 
pale area at middle, then dorsum 
chiefly dark brown to black; general 
coloration dark brown or black on a 
less -dark background: 773 
Re an. Group II, p. 191 
Antennae more nearly pale, yellowish 
or reddish rather than dark brown 
or black; second segment sometimes 
partly brown, but with larger pallid 
than brown areas; general coloration 
usually yellowish to reddish on a 
paler background. ..Group IV, p. 201 
Group I 
KEY TO SPEGiFe 
. First antennal segment greatly thick- 
ened; thickness nearly equal to dor- _ 
sal width of an eye, figy | /3.3eeee y) 
First antennal segment more slender; 
thickness distinctly less than dorsal 
width of an eye, fig. 174.3 eueee 3 
. Basal three-fou ths of second antennal 
segment yellowish, apical one-fourth 
black or very dark brown......... 
Rees Oe 8... lasiomerus, p. 185 
Second antennal segment uniformly 
yellowish, or very slightly dusky 
only at apex. ..pallidicornis, p. 185 
. Second antennal segment dusky yel- 
low to pale brown, white at base; 
clavus pallid; corium with an ob- 
lique, dark brown band on basal 
half that joins a brown area ex- 
tending along claval suture; length 
3.80-4:00 ies breviusculus, p. 190 
Second antennal segment chiefly 
black, usually with white bands... 4 
. Second antennal segment black at 
base, with a light-colored band 
more distad; length of first antennal 
segment greater than width of pro- 
notum at base; four small, black, 
conical projections, two on either 
side of median line, present near 
posterior margin of pronotum..... 
2 aahnc re antennalis, p. 185 
Second antennal segment with a light- 
colored band at base, black beyond 5 
. Third antennal segment with pale 
band at base and at middle....-+. 6 
Third antennal segment with pale 
band at base only, or annuli en- 
tirely wanting........ 97 7 
