38 Ittinois NATURAL History SuRvVEY BULLETIN 
width 0.69, vertex 0.34. Rostrum reaching 
only to middle of sternum. Antennae dark 
fuscous to black; first segment, length 0.17; 
second, 0.78, third, 0.39; fourth, 0.22. Pro- 
notum, length 0.52, width at base 1.04. Gen- 
eral color dark fuscous to black; vertex, 
median line of frons, median line and lateral 
margins of pronotal disk, claval suture, and 
base of cuneus, straw colored to yellowish. 
Legs straw colored to yellowish, femora 
dusky but with small, darker spots showing 
through; tibial spines and spots around their 
bases black. Body clothed with fine, short, 
pale to dusky pubescence. 
FEMALE.—Length 3.00, width 1.29. Rath- 
er similar to male in form and pubescence, 
but color much paler; pronotum yellowish 
with only calli black; frons with quadrate 
black spot on either side; median line of 
scutellum pale; hemelytra pale yellowish 
with fuscous confined to inner angles of 
clavus and apical half of corium, and with 
cuneus uniformly pale. 
Foop PLant.—Honey locust (Gleditsia 
triacanthos). 
Known  DistripuTion.— Illinois and 
‘Texas. 
Illinois Records.— Dotson: June 25, 
1932, Rocky Branch, Frison & Mohr, 19. 
FounTAIN BiuFF: May 15, 1932, Frison, 
Ross & Mohr, 1 ¢. Granp Tower: May 
12, 1932, Frison, Ross & Mohr, 5 9 ; May 
12, 1932, H. L. Dozier, 1 @. MAKANDA: 
Giant City State Park, May 21, 1932, H. 
L. Dozier, 19. 
Plagiognathus caryae Knight 
Plagiognathus caryae Knight (1923d, p. 448). 
Occurs on hickory (Carya ovata) and 
pecan (C. illinoensis). Not yet taken in 
Illinois; known from Mississippi, New York 
and ‘Texas. 
Plagiognathus repletus Knight 
Plagiognathus repletus Knight (1923d, p. 
49). 
This species is suggestive of albatus var. 
vittiscutis Knight but has the rostrum dis- 
tinctly shorter. 
Mave.—Length 3.70, width 1.25. Head 
width 0.69, vertex 0.30. Rostrum extending 
only to middle of intermediate coxae. Anten- 
nae, first segment, length 0.26; second, 1.10 
third, 0.69; fourth, 0.34. Pronotum, length 
0.56, width at base 1.10; black; area occupy- 
Vol. 220A che 
ing center of disk and extending between 
calli, pale yellowish. Scutellum yellowish; 
median line black. Hemelytra black; basal 
one-third of corium, embolium and cuneus, 
yellowish, translucent; membrane fuscous, 
veins paler. Clothed with simple yellowish 
pubescence. Legs yellowish; hind femora 
brownish on apical half except at extreme 
apex; two rows of black spots on anterior 
face; front and middle femora showing only 
three or four spots. 
FEMALE.—Length 3.90, width 1.40; more 
robust than male and rather similar in col- 
oration, but frequently with the pale areas 
broader. Very pale specimens may fail to 
show dark line on scutellum. 
The variety apicatus Knight (1923d, p. 
449) is generally darker on the dorsum than 
is the typical form; repletus apicatus has 
not been collected in Illinois. 
Foop PLants.—Walnut (Juglans nigra) 
and butternut (Juglans cinerea). 
KNown 1 DistrinuTIon.—Connecticut, II- 
linois, lowa, New York, Ohio. 
Illinois Records.—Nineteen males and 
36 females, taken June 5 to July 17, are 
from Alton, Freeport, Galena, Galesburg, 
Grand Detour, Hardin, Harvard, Marshall, 
Monticello, Palos Park. 
Plagiognathus davisi Knight 
Plagiognathus davisi Knight (1923d, p. 452). 
Known from Iowa and New York, but 
not yet taken in Illinois. 
Plagiognathus cornicola Knight 
Plagiognathus cornicola Knight (1923d, p. 
50). 
The general coloration of this species is 
fusco-brownish or ligneous with the calli 
darker; the second antennal segment is 
fusco-brownish and black at the base. 
Mave.—Length 3.40, width 1.24. Head 
width 0.69, vertex 0.32. Rostrum reaching 
near hind margin of middle coxae. Anten- 
nae, first segment, length 0.21; second, 0.82; 
fusco-brownish to fuscous, black at base; 
third, 0.60; fourth, 0.34. Pronotum, length 
0.54, width at base 1.10. General color 
fusco-brownish or ligneous, somewhat trans- 
lucent on hemelytra; cuneus evenly colored 
like corium; membrane fuscous, veins pale 
brownish. Body clothed with yellowish to 
golden pubescence. Legs fusco-brownish to 
black; tip of femora pale; tibial spines with 
