September, 1941 
Legs uniformly pale yellowish, without 
spots. 
Foop PLant.—Leafcup (Polymnia cana- 
densis ). 
Known DistriBpuTIoN.—Originally de- 
scribed from Illinois and known also from 
Indiana and Ohio. 
Illinois Records.—Sixty-seven males and 
66 females, taken April 4 to Oct. 29, are 
from Apple River Canyon State Park, 
Bloomington, Cave-in-Rock, Kappa, Oak- 
wood, Savanna, Urbana, Zion. 
Macrolophus Fieber 
REY LOS PECLES 
1. Length of first antennal segment equal 
to or slightly greater than width of 
head across eyes; length of second 
segment distinctly greater than 
basal width of pronotum......... 
ok Sei a aaa tenuicornis, p. 56 
Length of firs: antennal segment less 
than width of head across eyes... 2 
2. Postocular space of head nearly equal 
to lateral width of an eye; a fuscous 
stripe present at dorsal margin of 
eye; second antennal segment with 
apical one-fourth black; basal two- 
thirds of corium without fuscous 
points at bases of hairs except one 
row bordering claval suture....... 
he ae ane brevicornis, p. 55 
Postocular space of head little more 
than half lateral width of an eye; 
second antennal segment with a 
narrow fuscous area at apex; co- 
rium with three or four rows of 
fuscous points on basal two-thirds. 
Ma artes a's ds separatus, p. 55 
Macrolophus separatus (Uhler) 
Dicyphus separatus Uhler (1894, p. 194). 
Mave.—Length 4.30. Head width 0.54, 
vertex 0.28; lateral width of an eye 0.20, 
space between eye and pronotal collar, 0.11; 
without trace of a fuscous vitta behind 
dorsal margin of eye. Rostrum, length 1.79, 
scarcely attaining posterior margins of hind 
coxae. First antennal segment, length 0.38, 
black; second, 1.17, yellowish, narrow area 
at apex black; third, 1.28, slender, yellowish 
to dusky; fourth, 0.51, fusco-brownish. Pro- 
notum, length 0.66, width at base 1.06. 
FEMALE.—Length 4.20. Head width 0.56, 
KniIcHuT: PLANT Bucs, or MirIpDAE, oF ILLINOIS 55 
vertex 0.29; lateral width of an eye 0.20, 
space between eye and pronotal collar 0.11. 
First antennal segment, length 0.34; second, 
1.00, practically equal to width of pronotum 
atebase:; thirdss1 20a tourths0.02: 
Foop PLants.—Found breeding on Ge- 
rardia pedicularia; also occurs in Illinois 
on leafcup (Polymnia sp.). 
Known Distrisution. — Florida, Ili- 
nois, Indiana, Maryland, New York, Ohio. 
Illinois Records. — BLoomINcTon: July 
13a LOS 7 elie eelerison «llores CHICAGO: 
Aug. 4, W. J. Gerhard, 1 6, Fm. GoLcon- 
pA: June 22, 1932, Ross, Dozier & Park, 
eee LUARDEN’ ee tem -9 LOS 2 Le 
Doziere2ie71l0 ® KANKAKEE? opept. 19, 
1930, on Gerardia pedicularia, Frison & 
Ross, 28 ¢, 659. St. ANNE: Aug. 4, 1936, 
Frison & Burks, 19. Ursana: Aug. 25, 
LOSOe Heel Knights cid. 05912 1930, on 
Polpniiiioaspoe Uali er TisOn, Toon Ose 
ZON an Ulva One 3 2am ee Liew Pisoni, Ose, 
AOR 
Macrolophus brevicornis Knight 
Macrolophus brevicornis Knight (19261, p. 
15) 
This species is suggestive of tenuicornis 
Blatchley, but the antennae are distinctly 
shorter, with the first segment not equal to 
the width of the head; it is distinguished 
from separatus (Uhler) as shown in the key. 
Mare.—Length 3.60, width 0.96. Head 
width 0.48, vertex 0.26; lateral width of an 
eye 0.16, or a trifle greater than space 
(0.11) between eye and base of head where 
collar normally fits. Rostrum reaching to 
middle of hind coxae, length 1.34. Antennae, 
first segment, length 0.34, scarcely equal to 
width of vertex plus dorsal width of an eye; 
second, 0.88, being a trifle greater than 
width of pronotum at base, apical one- 
fourth black; third, 1.03; fourth, 0.43. Pro- 
notum, length 0.54, width at base 0.84. 
General coloration usually lemon yellow, 
sometimes greenish yellow; head with a 
fuscous stripe behind dorsal margin of eye; 
hemelytra with fuscous points more distinct 
than in tenuicornis, basal two-thirds of cori- 
um without fuscous points at bases of hairs, 
except one row bordering claval suture. 
FEMALE.—Head width 0.47, vertex 0.25; 
lateral width of an eye 0.16, space between 
eye and pronotal collar 0.11. Antennae, first 
segment, length 0.33; second, 0.75, not equal 
to width of pronotum at base; third, 1.00; 
