September, 1941 
half of pronotal disk usually distinctly 
bronzed. Membrane slightly smoky, with 
apical part of cells and a narrow transverse 
spot at apex of cuneus darker, veins pale to 
dusky. Legs greenish, each tibial spine with 
fuscous spot at base. Venter bright green 
to yellowish green. Genital claspers, fig. 164, 
distinctive for species. 
FeMALE.—Length 5.50, width 1.95. Form, 
color and pubescence very similar to those 
of male. 
Host PLtant.—Alder (Alnus incana). 
Known DistriBuTION.—lIllinois, Minne- 
sota, New Hampshire, New York, Nova 
Scotia, Quebec. 
Illinois Record.—HeErop: June 20, 1935, 
DeLong & Ross, 1 2. 
Neolygus geneseensis Knight 
Lygus (Neolygus) geneseensis Knight (19174, 
p. 609). 
Mave.—Length 5.00, width 2.05. General 
color yellowish brown to dark brown and 
fuscous. Allied to viburni Knight, having 
much the same color, but differs in being 
slightly smaller, having a longer rostrum 
and differently shaped genital claspers, fig. 
164. 
FEMALE.—Length 4.90, width 2.10; very 
similar to male, but more uniformly yellow- 
ish brown; distinguished from viburni by 
having uniformly yellowish antennae, and 
by the rostrum, which extends to posterior 
margins of hind coxae. 
Foop PLANts.—White oak 
alba) and post oak (Q. stellata). 
Known DistripuTion. — Georgia, IIli- 
nois, Iowa, Maryland, Massachusetts, 
Michigan, Mississippi, Missouri, New 
York, Pennsylvania, Virginia. 
Illinois Records.—Fifteen males and 13 
females, taken May 25 to July 4, are from 
Beach, Charleston, Elizabethtown, Frank- 
fort, Galena, Geff, Grand Detour, Harvard, 
Marshall, Oakwood, Palos Park, St. Joseph, 
White Heath, White Pines Forest State 
Park. 
(Quercus 
Neolygus viburni Knight 
Lygus (Neolygus) viburni Knight (19174, 
p. 609). 
Mave.—Length 5.20, width 2.08; width 
of head 1.03, vertex 0.38. Rostrum short, its 
apex scarcely attaining posterior margins 
of mesocoxae. Similar to omnivagus 
KNIGHT: PLANT Bucs, or MiriIpAE, oF ILLINOIS 
159 
Knight, but is smaller and more yellow- 
ish brown than that species. It also is closely 
related to geneseensis Knight, but is more 
robust and has a shorter rostrum; the apical 
half of the second antennal segment is dark- 
ened, and the general coloration is a richer 
yellowish brown. Claspers, fig. 164, distinc- 
tive for species. 
FEMALE.—Length 5.30, width 2.28; very 
similar to male in coloration, but usually 
not so dark. 
Foop Prant.—Sheepberry (Viburnum 
lentago). In New York state this bug often 
occurs in such numbers that foliage of its 
host is badly injured. 
Known DistripuTIon.—Connecticut, 
Illinois, Michigan, Minnesota, New York, 
Ohio, Pennsylvania. 
Illinois Records.—GaALENA: 
1932,. Dozier Xa iViohr;, 1-45" 179". 
BURG: July 16,:1892, 29. 
June 30, 
GALES- 
Neolygus communis Knight 
Pear Plant Bug 
Lygus (Neolygus) communis Knight (19162, 
p. 346). 
This species, fig. 165, is suggestive of 
invitus (Say), but may easily be distin- 
guished from it by the two black rays on the 
disk of the pronotum, the reddish lateral 
stripe on the body and the larger size. 
Ma ce.—Length 5.50, width 2.30. Anten- 
nae with second segment dark brownish to 
fuscous, sometimes with basal half paler; 
third dark brown; fourth fuscous. Prono- 
tum greenish, darkened with brown on 
basal half; two black rays on disk, one be- 
hind each callus and, in the darkest speci- 
mens, extending across calli, widened behind 
and nearly reaching hind margin. Scutellum 
greenish, darkened with brown; rarely with 
a longitudinal, median, fuscous line. Hem- 
elytra dark brown to fuscous, darker on 
apical half of corium and across tip of em- 
bolium; cuneus clear, tinged with yellow, 
extreme tip sometimes slightly darkened; 
membrane darkened. Legs greenish to yel- 
lowish, posterior femora and often interme- 
diate femora with two reddish annulations 
near each apex; frequently entire apical 
halves reddish. Venter pale greenish with a 
broad, lateral band and the genital segment 
dark brownish red; genital claspers dis- 
tinctive for species, fig. 164. 
FEMALE.—Length 5.40, width 2.40. More 
