144 
within areoles, distinctly paler; 
lene thes:Q07 eae plagifer, p. 144 
3. Posterior tibiae uniformly pale; femora 
pale or only rarely dusky near apex; 
embolium and basal half of corrum 
pale in both sexes. ..neglectus, p. 144 
Posterior tibiae fuscous, almost black 
near base; posterior femora black 
apically or with dark color forming 
two bands; embolium and basal half 
of corium pale in some female speci- 
TENS Oe Bel ee pettiti, p. 145 
Xenoborus commissuralis Reuter 
Xenoborus commissuralis Reuterin Van Duzee 
(1908, p. 112). 
Apu tts.—Length 6.40, width 2.30. Gen- 
eral color uniformly pale greenish, becom- 
ing yellowish after death; antennae, a 
narrow streak along commissure of hemely- 
tra, tips of tarsi, and tip of rostrum, very 
dark fuscous, almost black; membrane pale 
translucent; brachium and a streak beyond 
apex of larger areole dusky. 
Foop Piant.—Black ash (Fraxinus 
nigra); occurs during July and August. 
Known DistrisuTion.—lllinois, Iowa, 
Minnesota, New York, Nova Scotia, On- 
tario, Quebec. 
Illinois Records.—NorTHERN ILLINOIS: 
i 4534 9.) GADESBURG? shally 1G) 1 S92"92,0"- 
Xenoborus plagifer (Reuter) 
Tropidosteptes plagifer Reuter (1909, p. 51). 
Aputts.—Length 5.00, width 1.90. Gen- 
eral color pale yellowish testaceous; anten- 
nae, calli, male usually with a spot either 
side of median line on pronotal disk, clavus 
except claval vein, and spot on apical area 
of corium, very dark brown, almost black; 
scutellum yellow; membrane fuscous, with 
an oval spot on middle of apical half, 
and area within areoles, distinctly paler; 
female with pale areas broader, infuscation 
on apical half of membrane forming a ray 
at either side behind areoles. Male clas- 
pers as in fig. 157. 
Foop PLant.—Black ash (Fraxinus_ ni- 
gra); occurs during August and September. 
Known DistripuTion.—lIllinois, Minne- 
sota, New York, Ontario, Wisconsin. 
Illinois Records.—NorTHERN ILLINOIS: 
2A 0,9 . (SALESBURG pept. 1.2, sl ooo. 2 au 
2.0% 
ItLino1is NATURAL History SuRVEY BULLETIN 
Vol. 22; Art 
Xenoborus neglectus Knight 
Xenoborus neglectus Knight (1917c, p. 82). 
Mate.—Length 5.40, width 2.10. Gen- 
eral color black with pale areas; antennae 
almost black, paler on base of first segment; 
head with lower half of face fuscous; front 
pale, flecked with reddish; carina and a 
small median dash at middle of vertex al- 
most black. Pronotum not carinate, punc- 
tation and pubescence nearly as in plagifer 
(Reuter); collar and large median spot 
or ray on disk white or pale yellow; pale 
ray extending from outer angle of callus 
PLAG/IFER 
NEGLECTUS 
Fig. 157.—Male left 
Xenoborus. 
claspers of 
genital 
along lateral margin of disk to basal angle; 
scutellum pale yellowish, mesocutum almost 
black. Hemelytra very dark brown, almost 
black; embolium, basal angle of corium and 
cuneus, pale translucent; membrane uni- 
formly fuscous. Legs pale yellowish; hind 
femora sometimes dusky near apices, but 
never distinctly banded. Claspers as in fig. 
7s 
FremMALeE.—Membrane slightly paler on 
middle; a black ray present behind each 
callus; lateral margin and basal angle of 
disk remaining yellowish. 
~ Foop Piants.—Occurs during June and 
probably breeds on black ash (Fraxinus 
nigra). Found on pignut (Carya glabra) 
in Illinois. 
Known DistrisuTion.—lIllinois, Michi- 
gan, New York, Ohio, Ontario. 
Illinois Record.—East DuBugquE: June 
1, 1933, on Carya glabra, Ross & Townsend, 
TAN Soo 
