44 ILLiIno1is NATURAL History SURVEY BULLETIN 
pair strongly thickened; coxae and 
tibiae dull yellow brown to dark 
brown, more or less tinged with 
reddish pe mage ancorifer, p. 46 
Legs chiefly black; femora more 
slender, black, apices of front and 
middle pairs pale; coxae deep 
black; tibiae very light yellow to 
dull yellow brown, black spots at 
bases of spines... ....drakei, p. 46 
Psallus parshleyi Knight 
Psallus parshleyi Knight (1923d, p. 465). 
The color aspect of this species is sug- 
gestive of Plagiognathus obscurus fraternus 
Uhler, but Psallus parshleyi is to be distin- 
guished by the sericeous, semiscalelike pu- 
bescence on its pleura and dorsum. 
Matve.—Length 4.50, width 1.70. Ros- 
trum just reaching hind margins of middle 
coxae. Second antennal segment, length 
1.26. Pronotum, width at base 1.37. Body 
black, basal half of cuneus, tip of embolium, 
and a small translucent spot near base of 
corium, pale. Legs pale yellowish; coxae 
fuscous at base; femora with dark line 
forming above and below on apical half, 
anterior face with three or four spots on 
apical half. 
FEMALE.—Length 4.00, width 1.66; more 
robust than male but very similar in colora- 
tion. 
Foop PLant.—Birch (Betula pumila). 
KNown DiIstriBuTION.—lIllinois, Massa- 
chusetts, Minnesota, New York. 
Illinois Record.—AntTiocH: July 5-7, 
1932. 0F rison efialoecso ceo e 
Psallus fuscatus Knight 
Psallus parshleyi var. fuscatus Knight 
(1923d, p. 466). 
This species is allied to parshleyi Knight, 
but is distinguished by its smaller size and 
uniformly black femora and hemelytra. 
Mare.—Length 3.70, width 1.40. Ros- 
trum reaching posterior margins of hind 
coxae. Second antennal segment, length 0.95, 
black. Pronotum, width at base 1.08. Body 
sparsely clothed with silvery, silky hairs 
intermixed with more erect yellowish pu- 
bescence. Body black, paler areas appearing 
very dark brown, cuneus uniformly black 
like corium. Legs black, tips of femora and 
tibiae yellowish, tibial spines with prominent 
black spots at bases. 
Vol. 223Artal 
FEeMALE.—Length 3.30, width 1.40; very 
similar to male in color and pubescence. 
Host Prant.—Alder (Alnus rugosa). 
Known  Distripution. — Illinois and 
Minnesota. 
Illinois Records. — Dotson: June 25, 
1932, Rocky Branch, Frison & Mohr, 19. - 
E1cHorN: June 24, 1932, on Alnus rugosa, 
Ross, Dozier & Park, 6¢, 109; June 13, 
1934, DeLong & Ross, 22,19. 
Psallus amorphae Knight 
Psallus amorphae Knight (19304, p. 125). 
This species is black, with the second an- 
tennal segment yellow except at the base. 
ApuLts.—Length 3.00-3.20, width 1.20- 
1.30. Rostrum extending to hind margins of 
middle coxae. Second antennal segment, 
length 0.87, yellow, black at base; pronotum, 
width at base 0.99. Body black, dorsum 
and sides clothed with rather closely ap- 
pressed silvery, silky to scalelike pubescence. 
Foop PLants.— Lead plant (4Amorpha 
canescens and A. fruticosa). 
KNown DIsTRIBUTION.—Previously 
known only from Iowa and Minnesota. 
Illinois Records.—Granp Detour: July 
2, 1932, Dozier & Mohr, 59. Movuwnps: 
May 23, 1932, H. L. Dozier, 1a OouAnWe 
KA: June 13, 1932; HMDS Do7ierwe 
STARVED Rock STATE Park: July 14, 1932, 
Dozier & Park, 19. 
Psallus alnicola Douglas & Scott 
Psallus alnicola Douglas and Scott (1865, 
p. 414). 
Not taken in Illinois; known from Colo- 
rado, Idaho, Michigan, Minnesota, New 
Hampshire, New York, Oregon, Washing- 
ton; Europe. Breeds on alder (Ad/nus rugo- 
sa) in cool, humid surroundings. 
Psallus alnicenatus Knight 
Psallus alnicenatus Knight (1923d, p. 466). 
Not taken in Illinois; known from Michi- 
gan, Minnesota and New York. 
Psallus piceicola Knight 
Psallus piceicola Knight (1923d, p. 469). 
This species is very dark brown, almost 
black; the hemelytra are more brownish 
than the rest of the dorsum, and the anten- 
nae and base of the cuneus are pale. 
