September, 1941 
tender foliage. In times of rain or cold 
weather the nymphs retreat under the bud 
scales which remain on the trees. Up to the 
fourth instar the nymphs are greenish yel- 
low, but later they become tinged with 
pink; in the last instar the wing pads be- 
come brownish while the body is pink. In 
western New York the nymphs are develop- 
ing during May and usually begin maturing 
during the first week of June; the adults 
may remain on the trees up to the middle of 
July. Eggs are laid mostly in late June and 
early July in the oak twigs; there they pass 
the winter, and the nymphs come forth with 
the bursting of the buds the following 
spring. 
Known DistrinuTion.—Connecticut, 
Illinois, Iowa, Maryland, Massachusetts, 
Michigan, Minnesota, Missouri, New York, 
Ontario, Virginia, Wisconsin. 
Illinois Records.—Twenty males and 18 
females, taken May 9 to July 6, are from 
Algonquin, Antioch, Beach, Cedar Lake, 
Dongola, Dubois, Elizabeth, Frankfort, Ga- 
lena, Glen Ellyn, Goreville, Grand Detour, 
Harvard, Meredosia, Oregon, St. Anne, Sa- 
vanna, Urbana, Willow Springs, Zion. 
Neolygus fagi Knight 
Lygus (Neolygus) fagi Knight (19174, p. 
603). 
Not as yet collected in Illinois; known 
from Massachusetts, New Hampshire, New 
York, Ohio, Vermont. Feeds on _ beech 
(Fagus grandifolia) and birch (Betula 
lutea). 
Neolygus inconspicuus Knight 
Knight 
Lygus (Neolygus) inconspicuus 
9174, p. 612). 
Mave.—Length 4.50, width 2.08. Gen- 
eral color pale greenish; a transverse brown- 
ish spot at apex of corium and on area of 
clavus bordering scutellum; in general ap- 
pearance, resembling ftiliae Knight and cla- 
vigenitalis Knight, but differing greatly from 
those species in form of genital claspers, 
fig. 164. 
FEMALE.—Length 4.80, width 2.25; very 
similar to male in size and coloration; simi- 
lar in size and general appearance to cla- 
vigenitalis and tiliae; distinguished from the 
latter by the pale scutellum, and from the 
former by being more greenish with a paler 
| scutellum. 
KNIGHT: PLANT Bucs, or MirIDAE, oF ILLINOIS 
161 
Foop PLANT.—Muscadine grape 
rotundifolia). 
Known DistriBuTION.—Connecticut, 
Georgia, Illinois, Indiana, Iowa, Maryland, 
Michigan, Minnesota, New York, North 
Carolina, Oklahoma, Virginia. 
Illinois Records.—NorTHERN ILLINOIS: 
JuneelO. ALDRIDGE: May 3) 1932,-H. LL. 
Dozier, 1 9. ELIZABETH: July 6, 1917, 1¢@. 
FREEPORT: July 4, 1917, 1 @. Orecon: June 
June 11, 1933, Mohr & ‘Townsend, 19¢@. 
WILLow Sprincs: July 3, 1904, W. J. Ger- 
hardy or ant, 
(V itis 
Neolygus tiliae Knight 
“eee (Neolygus) tiliae Knight (19174, p. 
Mare.—Lenegth 4.60, width 1.74; rather 
small, scarcely as large as invitus (Say). 
General color greenish yellow, with base ot 
pronotum darker, and scutellum, clavus and 
corium dark fuscous to black. Genital 
claspers distinctive, fig. 164. 
FEMALE.—Length 5.00, width 2.00. 
Lighter colored than male and_ usually 
slightly larger; pronotum yellowish, scutel- 
lum and clavus only slightly darkened, apex 
of corium with a triangular dark patch, 
much resembling belfragii (Reuter) in this 
respect; similar in size and general appear- 
ance to inconspicuus Knight and clavigent- 
talis Knight; distinguished from inconspi- 
cuus by having front of head more conic 
and scutellum darker; clavigenitalis differs 
from this species in being generally more 
brownish with a paler scutellum. 
Foop PLrant.—Linden (Tilia americana). 
Known DistriBuTION.—Connecticut, 
Illinois, Iowa, Massachusetts, Minnesota, 
New York, Ohio, Ontario, Pennsylvania, 
Vermont. 
Illinois Records.—Sixty-seven males and 
53 females, taken June 8 to July 19, are 
from Algonquin, Antioch, Elizabeth, Frank- 
fort, Freeport, Galena, Galesburg, Kamps- 
ville, Monticello, Oregon, Urbana, Wauke- 
Cate 
Neolygus caryae Knight 
Lygus (Neolygus) caryae Knight (19174, p. 
15) 
Matre.—Length 4.80—-5.70, width 2.10. 
General color varying from dark brown or 
black ‘to yellowish brown with more promi- 
nent dark areas on pronotum and apex of 
