Oy ILLINOIS NATURAL History SURVEY BULLETIN 
Orectoderus Uhler 
Orectoderus obliquus Uhler 
Orectoderus obliquus Uhler (1876, p. 320). 
Mace.—Length 8.00, width 2.30. Head 
elongate, inclined, width 1.22, vertex 0.60. 
Rostrum extending to near apex of middle 
coxae. Antennae with first segment yel- 
lowish, length 0.47; second, 2.42, apical 
one-third distinctly thickened, yellowish to 
orange, thick part black; third, 1.55; fourth, 
0.86; last two segments orange. Pronotum, 
length 1.30, width at base 1.81; lateral 
margins rounded, slightly concave. General 
color black, shining; legs yellowish to orange 
colored. Body sparsely clothed with short, 
yellowish pubescence. A color variation has 
the basal half of cuneus and basal one-third 
of corium white. 
FEMALE.—Length 6.00, width of abdomen 
2.40. Brachypterous, antlike in form, head 
broader than pronotum; hemelytra greatly 
reduced, extending to base of abdomen, there 
turning upward, the tips vertical and taper- 
ing to a point; two basal segments of ab- 
domen constricted into a pedicel, the remain- 
ing segments forming a globose portion, the 
pleural fold prominent. General color pice- 
ous to black; antennae yellowish to orange, 
tips of second and third segments blackish. 
Hasits.—Occurs on the ground among 
grasses and associated with ants. 
KNown DistrisuTion.—Alberta, Colo- 
rado, Connecticut, Illinois, Maine, Mani- 
toba, Massachusetts, Montana, New Bruns- 
wick, New Mexico, New York. Uhler 
(1876, p. 320) records this species from 
Illinois. 
Teleorhinus Uhler 
No Illinois species; Teleorhinus tephrosi- 
cola Knight is known from Missouri, New 
Jersey, New York, and may eventually be 
taken in Illinois. It breeds on hoary pea 
(Tephrosia sp.). 
Coquillettia Uhler 
Coquillettia amoena (Uhler) 
Orectoderus amoenus Uhler (1877, p. 426). 
Mave.—Length 6.40, width 1.77. Head 
width 0.90, vertex 0.41. Antennae dark 
brown; first segment, length 0.38; second, 
2.20; third, 2.00; fourth, 0.95. Pronotum, 
Vol. 225Arie 
length 0.99, width at base 1.43. General 
color dark orange brown; abdomen, tarsi 
and second antennal segment becoming fus- 
cous; basal half of corium transparent, 
apical part bright orange brown, but with 
a slender dark brown margin; basal one- 
third of cuneus white, slightly translucent; 
membrane and apical two-thirds of cuneus 
very dark brown, almost black. 
I'EMALE.—Length 5.50, wingless; antlike 
in form, head wider than pronotum; abdo- 
men with first two segments constricted to 
form a pedicel, remaining segments forming 
a globose, polished, minutely and’ sparsely 
haired gaster with conspicuous pleural fold. 
General color brown; third and fourth an- 
tennal segments and apex of second, tarsi, 
and apices of tibiae, fuscous to black; globose 
portion of abdomen, and tergite of second 
segment, dark chestnut to pitchy black. 
Known DistripuTion. — Florida, I[li- 
nois, lowa, New Mexico, North Carolina, 
Texas. The only Illinois record is that in 
the original description where Uhler stated: 
“Other specimens have been secured in... 
Illinois.” 
Occurs on high prairie among grasses and 
appears to be associated with ants, such as 
Formica (Neoformica) pallide-fulva var. 
incerta Emory. The wingless female bugs 
resemble this ant in form and color so nearly 
that one must look rather closely to separate 
them. 
DICYPHINAE 
KEY TO GENERA 
1. Eyes large, postocular space of head 
less than half lateral width of an 
eye; first antennal segment always 
short, fig. 94..... Cyrtopeltis, p. 53 
Eyes small, postocular space much 
longer, figs. 95, 97; or first antennal 
segment very long, fig) 93 =a 2 
i) 
Hemelytra hyaline, completely trans- 
parent and glassy, with a well-de- 
fined, red or fuscous Y-shaped 
mark, fig. 98; pseudarolia absent, 
fig. 32; form broader {2a 
Daan! een. ene Hyaliodes, p. 56 
Hemelytra opaque or at least milky, 
and with brown, scattered spots or 
widely suffused brownish areas; 
pseudarolia prominent, figs. 29, 53; 
form narrower, fig. 97, 7) 2 
3. Pronotal disk with an arcuate, deep 
