September, 1941 
Mave.—Length 3.00, width 1.08. Head 
width 0.60, vertex at basal margin 0.34, 
narrowest point on front 0.27; strongly in- 
clined vertically. Rostrum extending behind 
posterior coxae. Antennae with first seg- 
ment pale; second, 0.66 in length, pale with 
dusky tinge. Pronotum, width at base 0.91. 
Hemelytra fusco-brownish to black, base of 
cuneus pale; clothed with golden to dusky 
pubescence intermixed with more closely 
appressed, silvery, woolly pubescence. Legs 
very dark brown, apices of femora and tibiae 
pale; tibial spines black, a fuscous spot at 
base of each. 
FEMALE.—Length 2.90, width 1.30; more 
robust than male, but very similar in colora- 
tion; hemelytra usually more brownish. 
Foop PLANT.—Spruce (Picea sp.). 
Known DistrisuTion.—lIllinois, Minne- 
sota, New York. 
Illinois Record.—AnriocH: July 5-7, 
Fs2eon spruce, Frison ef al..2 2,29. 
Psallus strobicola Knight 
Psallus strobicola Knight (1923d, p. 467). 
This species is very dark fuscous, almost 
black; the antennae and the legs, except for 
the coxae, are yellow; the body is clothed 
with closely appressed, silvery, silky pubes- 
cence. 
Matve.—Length 3.50, width 1.33. Head 
width 0.72, vertex 0.33 measured across pos- 
terior corners of eyes; black; eyes reddish 
brown. Rostrum, length 1.25, reaching hind 
margins of posterior coxae, yellow, basal 
segment black. Antennae yellow; first seg- 
ment, length 0.17; second, 0.97; third, 0.62; 
fourth, 0.39, slightly dusky. Pronotum, 
length 0.53, width at base 1.08. Hemelytra 
uniformly very dark fuscous; clothed with 
closely appressed, silvery, silky pubescence 
intermixed with more erect dark pubescence 
similar to that of the pronotum and scutel- 
lum; emboliar margins very slightly arcu- 
ate; membrane and veins uniformly fuscous, 
border of cuneus not perceptibly paler. Legs 
yellow, coxae almost black except at apex; 
tibial spines black without dark spots at 
bases. 
FEMALE.—Length 3.10, width 1.36; more 
robust than male, but otherwise very similar. 
Foop PLANT.—Pine (Pinus strobus). 
Known DistrisuTion.—lllinois, Minne- 
sota, New York, Ohio, Quebec. 
Illinois Records. — GaALENA: June 30, 
1932, on Pinus strobus, Dozier & Mohr, 
KNIGHT: PLANT Bucs, or MirIpDAE, oF ILLINOIS 45 
3d, 4100) KEITHSBURG: June 15,1932, H. 
L. Dozier, 1¢, 49. Mount Carro.: 
June 15, 1932, on Pinus strobus, Frison & 
Mohr, 28,19. Urpana: June 11, 1915, 
19. WuHuite Pines Forest STATE PARK: 
July 4, 1932, on grasses, Dozier & Mohr, 
1 @; July 4, 1932, on Pinus strobus, Dozier 
& Mohr, 29. 
Psallus astericola Knight 
Psallus astericola Knight (19304, p. 125). 
Known only from Iowa. Breeds on prairie 
aster (Aster sericeus), which grows only on 
undisturbed, native prairie. 
Psallus morrisoni Knight 
Psallus morrisoni Knight (1923d, p. 464). 
Not taken in Illinois; known from Mas- 
sachusetts, Minnesota, New York. 
Psallus bakeri (Bergroth) 
Agalliastes signatus Uhler (1895, p. 55). Pre- 
occupied. 
Chlamydatus bakeri Bergroth (1898, p. 35). 
This species has previously been placed in 
the genus Chlamydatus, but its two types of 
pubescence, its longer antennae, and the 
form of its pseudarolia place it in Psallus. 
ApuLtTs.—Length 2.60-2.90. General col- 
or fuscous to black, two spots on vertex and 
frequently base of cuneus paler. Legs yel- 
lowish to dusky yellow; hind femora fre- 
quently dark fuscous; femora with two or 
three black dots on dorsal surface before 
apex; tibiae pale, spines black with a prom- 
inent black spot at base of each. Clothed 
with pale, simple hairs intermixed on dor- 
sum with some silky, silvery pubescence. 
Foop PLant.— Sage brush (drtemisia 
SDN)\e 
Known  DyistriputTion.— Occurs _ fre- 
quently in the states west of the Mississippi 
River. 
Illinois Records.—Granpb Detour: July 
12, 1934, DeLong & Ross, 34,29. OrzE- 
GON: July 4, 1932, on Artemisia canadensis, 
Dozier & Mohr, 102, 339. Rockton: 
July 5, 1932, Dozier & Mohr, 29. 
Psallus seriatus (Reuter) 
Atomoscelts seriatus Reuter (1876, p. 91). 
This is the well-known cotton flea hopper, 
distinguished by its pale color, the black 
