40 ILLINOIS NATURAL History SURVEY BULLETIN 
rather than partly, black belong to the va- 
riety crataegi Knight (1929d, p. 264). 
Foop Piants.—Hickory (Carya_ sp.), 
hawthorn (Crataegus sp.); Illinois speci- 
mens were taken also on ash (Fraxinus sp.). 
Known DIstTrIBUTION. — Illinois, Iowa, 
Michigan, New England, New York. 
Illinois Records.—Sixty-three males and 
67 females, taken May 31 to July 4, are 
from Champaign, Dixon, Frankfort, Ha- 
vana,» |olietss acon, jopariand, Urbana 
White Pines Forest State Park. 
Plagiognathus suffuscipennis Knight 
Plagiognathus suffuscipennis Knight (1923d, 
p. 454). 
This species is distinguished by its trans- 
lucent, pale yellowish brown hemelytra; the 
second antennal segment is pale yellowish 
brown, darker at the base. 
Mave.—Length 3.40, width 1.30. Head 
width 0.68, vertex 0.36. Rostrum reaching 
hind coxae. Antennae, first segment, length 
0.23; second, 0.81; third, 0.54; fourth, 0.36. 
Pronotum, length 0.45, width at base 0.98. 
Body blackish brown; pubescence yellowish 
to dusky; scutellum black; cuneus uniformly 
translucent yellowish brown like corium. 
Legs yellowish testaceous; femora with two 
series of fuscous dots on anterior face and a 
group of six or eight spots on apical half of 
posterior face. 
FEMALE.—Length 3.20, width 1.37; very 
similar to male in coloration, but more ro- 
bust in form. 
Foop PLANtT.—Spruce (Picea mariana). 
Known DistrisuTion.—lIllinois, Maine, 
Minnesota, New York. 
Illinois Records——AntiocH: July 5-7, 
1932, Frison et al., 19. GaLeNa: June 30, 
1932, on spruce, Dozier & Mohr, 102,89. 
KeEITHSBURG: June 15, 1932, on spruce, H. 
La Doziers 6 45308 
Plagiognathus guttulosus (Reuter) 
Psallus guttulosus Reuter (1876, p. 89). 
This species is distinguished by its pale 
color and its numerous reddish brown dots. 
It has been placed in the genus Psallus up 
to the present time, but the possession of a 
single type of simple pubescence refers it to 
Plagiognathus. 
Mave.—Length 3.00, width 1.20. Head 
width 0.69, vertex 0.30. Rostrum reaching 
posterior margins of hind coxae. Antennae, 
V olieeskaree ee 
first segment, length 0.21; second, 0.99; 
thickness equal to that of first segment; 
third, 0.34; fourth, 0.26. Pronotum, length 
0.52, width at base 0.99. Body pale, thickly 
dotted with reddish brown to dusky brown 
points; calli shaded brown; median line of 
pronotal disk paler. Body clothed with pale 
to yellowish simple pubescence. Legs pale; 
femora thickly dotted with brown, hind pair 
darker; tibial spines pale, but with black 
dot around base of each. 
FEMALE.—Length 3.00, width 1.40; very 
similar to male in color and pubescence. 
Foop PLANT.—Oak (Quercus sp.) 
Known DIstTrisuTION. — Florida, 
nois, Mississippi, Texas. 
Illinois Records——CHAMPAIGN: June 6, 
1888, at electric light, 1 ¢. Dusois: May 
21, 1917, 1@ ; May 22/510) 7esaen 
Ili- 
Plagiognathus repetitus Knight 
Plagiognathus repetitus Knight (1923d, p. 
53% 
Breeds on cranberry (Vaccinium) in 
Massachusetts. Not yet collected in Illinois, 
but occurs in Massachusetts, Michigan, 
New Jersey, New York. 
Rhinocapsus Uhler 
No Illinois species; Rhinocapsus vandu- 
zeet Uhler occurs from New England west 
to Michigan and south to North Carolina. 
Microphylellus Reuter 
KEY TO SPECIE. 
1. Hemelytra more or less pale; embo- 
lium, cuneus and *basalaehalieon 
corium almost colorless or yellow- 
ish; scutellum light, with median 
line black. ...... 1... 2 
i) 
Second antennal segment and femora 
uniformly pale <7. macu- 
lipennis var. maculipennis, p. 41 
Second antennal segment dark brown 
to black, femora with fuscous dots. 
lipennis var. fuscicornis, p. 41 
3. Second antennal segment black, first 
segment pale on apical half....... 
ree nigricornis, p. 41 
Second antennal segment pale, or 
fuscous‘at base only.) eee 4 
