104 
Algonquin, Antioch, Apple River Canyon 
State Park, Dubois, Elizabeth, Galena, 
Meredosia, Muncie, Oregon, Valley City. 
Orthotylus nyctalis Knight 
Orthotylus nyctalis Knight (1927e, p. 181). 
This species is very similar to lateralis 
Van Duzee in color, but its form is more 
slender; the two differ chiefly in the struc- 
ture of the male genital claspers. 
Mare.—Length 5.10, width 1.40. Ros- 
trum extending slightly beyond middle of 
intermediate coxae. Antennae very dark 
fuscous, with second segment uniformly 
dusky yellow. Coloration nearly as in late- 
ralis, but darker. Clothed with simple, sub- 
erect, bristly, pale hairs. Ground color pale, 
with lateral margins of pronotal disk, dorsal 
halves of propleura, and all but narrow area 
at apex of first antennal segment, black; 
outer half of corium, base of clavus, apical 
half of cuneus, episterna, and dorso-lateral 
margins of venter, fuscous to blackish; mem- 
brane pale fuscous with veins and narrow 
areas of membrane bordering veins, clear. 
Genital claspers as in fig. 128. 
FEMALE.—Length 4.80, width 1.64. An- 
tennae dusky yellow, third segment pale to 
dusky, fourth dusky. More robust than 
male, but very similar in color and pubes- 
cence. 
Known DistrisuTion. — Illinois, Iowa, 
Minnesota, New York, Wisconsin. 
Illinois Records. — Oakwoop: July 5, 
1936, Mohr & “Burks, 19. WiLLow 
SPRINGS: July 21, 1912, on poplar, W. J. 
Gerhard, 1 ¢@, xe. 
Orthotylus lateralis Van Duzee 
eens lateralis Van Duzee (19164, p. 
ie 
Mave.—Length 4.60, width 1.47. Head 
pale yellowish, frons and tylus_ blackish. 
Rostrum, length 1.30, extending upon tips of 
middle coxae, yellowish, apex black. An- 
tennae with first segment black; second 
cylindrical, black, clothed with fine, short, 
dusky pubescence; third and fourth black. 
Pronotum. black; ventral margins of pro- 
pleura pallid; disk behind calli and the an- 
terior margin, pale to yellowish; calli brown- 
ish to black. Scutellum pallid, lateral mar- 
gins narrowly fuscous; mesoscutum yellow- 
ish to fuscous. Hemelytra dark fuscous; 
base of corium, embolium and base of cu- 
ILLino1is NATURAL History SURVEY BULLETIN 
V ol. 225 AG 
neus pale translucent. Membrane and veins 
pale fuscous, central area paler. Body be- 
neath pale to yellowish; sides of thorax and 
venter dark fuscous. Dorsum clothed with 
simple, suberect, pale to dusky pubescence. 
Legs pale greenish; apical half of hind 
femora fuscous; tibiae dusky; tarsi fuscous. _ 
FEMALE.—Length 4.80, width 1.50. More 
robust than the male; similar in color but 
pallid areas more extensive. 
KNown DIstrIBUTION.—Described from 
Colorado and since recognized from Illinois, 
Iowa, Minnesota and Oklahoma. 
Illinois Records.—GALEsBuRG: July 16, 
1892, on “cottonwood,” Stromberg, 39. 
MontTICELLO: June 28, 1914, C. A. Hart, 
1307 
Orthotylus modestus Van Duzee 
Orthotylus modestus Van Duzee (19164, p. 
Mare.—Length 4.40, width 1.44. Ros- 
trum reaching to middle of intermediate 
coxae. Antennae fusco-brownish, first seg- 
ment darker. General color fuscous to 
blackish. Head and paler parts of hem- 
elytra tinged with yellowish; embolium pale, 
base of corium, rather broad area along 
radius, and cuneus, greenish yellow; mem- 
brane uniformly infuscated, veins scarcely 
paler. Body clothed with moderately prom- 
inent, simple, pale yellowish pubescence. 
Genital claspers distinctive for species, fig. 
1283 
FEMALE.—Length 4.50, width 1.47. Gen- 
eral color pale greenish. Legs darker; dor- 
sum marked with blackish; spot at base of 
tylus, transverse mark across bases of calli, 
mark paralleling basal margin of pronotal 
disk which approaches but does not attain 
lateral angles, basal angles and median spot 
at base of scutellum, all but basal angles of 
clavus, and spot on inner apical angle of 
corium, fuscous to black; membrane uni- 
formly dark fuscous. 
The black markings vary greatly in extent 
and intensity, in some cases being indistinct 
or absent. The uniformly green-colored 
specimens of this species constitute the va- 
riety immaculatus Knight (1923d, p. 520). 
Host Prants.—Willows (Salix fragilis 
and S. nigra). 
Known DistripuTion.—Connecticut, 
District of Columbia, Illinois, Indiana, 
Iowa, Michigan, Minnesota, New Jersey, 
New York, Ohio, Ontario, Pennsylvania. 
