70 
10. 
ita 
we Callisolidi blackea 
Ittinois NATURAL History SuRVEY BULLETIN 
with discoidal margins pale, calli 
and posterior part of disk black, 
forming a ray behind each callus, 
thus leaving median line pale...... 
Te ete Se ren Rh alnicola, p. 70 
Second antennal segment without 
prominent, exserted hairs or, if such 
hairs present, their length never 
more than twice thickness of seg- 
ment; pronotal disk without distinct 
rays, sometimes black, but Jateral 
margins not distinctly paler...... 
_aphidiphagus, pen! 
Fann finere math two brown or fus- 
cous bands near apex; apical half 
of membrane with a distinctly 
rounded fuscous spot, usually con- 
nected at base by a fuscous streak 
that extends up between large 
AreOesew en fase hela et AE One 8 
Hind femora with but one fuscous 
band; apical half of membrane pale 
or clouded with fuscous, but fus- 
cous area not forming a rounded 
Spouen apicaltia | jee eee 9 
broad piceous ray 
behind each; in pale specimens, calli 
may be somewhat brownish, but, 
in such case, median line anal mar- 
gins of disk distinctly pale, leav- 
ing a dark brown ray behind each 
callus; hemelytra with clavus and 
corium piceous, embolium pale... . 
Focal tek ae te eee teen borealis, p. 71 
Calli more or less invaded with brown- 
ish or pale areas, distinct rays not 
apparent behind calli; hemelytra 
and pronotum more uniformly 
colored, fulvo-testaceous to dark 
DEGWHISH.. cp eee ec eee: 
ee aa fasciolus var. castus, p. 70 
Dorsum uniformly very dark brown; 
calli and scutellum black......... 
Ba tae Re a eee ee davisi, p. 72 
Dorsum pale to testaceous and brown- 
ish, frequently becoming fuscous 
or black but always with some pale 
areas; calli margined with black or 
Citirel yablack on heen. 6 ene 10 
Calli black only around margins, dor- 
sum rich brownish to deep brown, 
Shining eee nitenatus, p. 72 
Calli entirely black, or, if not, dorsum 
pallid and with three darkened 
spots on each hemelytron, one at 
apex, one at middle and one at base.11 
Dorsum fuscous to black, usually with 
V ol. 22,,A7tae 
a pale median line running over disk 
and scutellum; hemelytra darkened 
to such an extent that three blotch- 
like, fuscous spots are not apparent 
..quercicola var. quercicola, p. 71 
Dorsum pallid brown with three dark 
spots, one at base, one at middle 
and one at apex of each hemelytron; 
calli usually entirely black, but, in 
pale specimens, calli only margined 
with black. ...... eee 
Deraeocoris betulae Knight 
Deraeocoris betulae Knight (1921, p. 129). 
No Illinois specimens; known from the 
New England and Middle Atlantic states; 
occurs on birch (Betula lutea). Male geni- 
talia as in fig. 106. 
Deraeocoris alnicola Knight 
Deraeocoris alnicola Knight (1921, p. 132). 
No Illinois specimens; known from Con- 
necticut, Ontario, New York; occurs on 
alder (Alnus incana). Male genitalia as in 
fig. 106. 
Deraeocoris fasciolus Knight 
Deraeocoris fasciolus Knight (1921, p. 123). 
ApuLts.—Length 6.50, width 2.80-3.10; 
usually slightly smaller than borealis (Van 
Duzee), disk of pronotum more uniformly 
colored, calli more or less invaded with 
brownish or pale and without distinct rays 
behind; left genital clasper very similar to 
that of borealis, but right clasper distinctive, 
fig. 106. 
In the variety fasciolus castus Knight 
(1921, p. 125) the tibiae are uniformly yel- 
lowish rather than partly dark, as in the 
typical form; castus has not been taken in 
Illinois. 
Hasits.—Occurs on hawthorns (Cra- 
taegus sp.) and apple trees, where it feeds 
on the rosy aphid, Macrosiphum rosae (Lin- 
naeus). In New York the author found 
the white, wax-coated nymphs of D. fascio- 
lus frequenting the aphid-curled leaves, feed- 
ing on aphids and their honeydew excretions. 
Illinois Records——NortTHERN ILLINOIS: 
July, 14, 1¢.- ANTIocH: “Augaei=aee 
Frison, Knight & Ross, 19. GaALENA: 
June 30, 1932, Dozier & Mohreiges 
MonrTIcELLo: June 11, 1934, Frison & De- 
