120 
i) 
Ittinois NATURAL History SURVEY BULLETIN 
Hemelytra behind posterior silvery 
line polished on area exterior to 
radtaleveinionl yaaa ee cee 8 
Hemelytra with erect, short, black 
bristles eatin’, ROS ee taco eee are 5 
Hemelytra clothed only with fine, re- 
cumbent pubescence, this pubes- 
cence sometimes black, but not 
erectsandibristiclike aaramn seen ee 4 
. Third antennal segment black, nearly 
as thick-as irstceg ich tran. 
x .vanduzeei, p. 120 
eect anesirell eeeariayt: pale, with 
apical half infuscated, slender, 
scarcely thicker than fouren seg- 
MCN tye eee uhleri, p. 122 
. Pronotum with silvery, silky and to- 
mentose pubescence; length 5.00. . . 
saath lp See ae strobicola, p. 122 
Pronotum without silvery, silky and 
tomentosespubescences = nn ee 5 
. Length 4.50; posterior silvery line not 
interrupted on corium, but slightly 
dislocated at claval suture; second 
antennal segment gradually thick- 
ened toward apex..amoenus, p. 122 
Length not exceeding 3.90; posterior 
silvery line interrupted on corium 
but not dislocated at claval suture. 6 
Second antennal segment strongly 
clavate on apical one-third........ 
Sef i0 ae en gee laetus, p. 121 
Second antennal segment gradually 
thickened from middle to apex.... 7 
. Third antennal segment dark brown; 
fourth segment pale. . taxodii, p. 121 
Third antennal segment pale with 
apex darkened; fourth segment 
fsCOUuS thon ee juniperi, p. 123 
. Transverse silvery line of clavus and 
corlum continuous and _ straight, 
that of clavus bent slightly forward 
but nevyermdisconnected (ae 
Oe ein ee et perplexus, p. 121 
Transverse silvery line of clavus and 
corium dislocated at claval suture 
oF On coriumatradialveinea ae 9 
. Posterior silvery band widely dislo- 
cated at radial vein, inner portion 
set forward and forming a straight, 
transverse line with that on clavus; 
lengthen geminus, p. 122 
Posterior silvery band not widely dis- 
located on corium at radial vein, 
often sloping forward to join band 
on clavus, but not forming a 
Kol. 22, Arta 
straight, transverse line with claval 
band. ..3...... 0.) =n 10 
10. Hemelytra clothed with fine, soft, re- 
cumbent pubescence only. 11 
Hemelytra bearing sparsely set, erect, 
short, stiff hairs intermixed with 
soft, recumbent pubescence. ame 12 
11. Length of second antennal segment 
less than distance between tip of 
tylus and posterior margin of pro- 
notum; length 3.50. .walshii, p. 123 
Length of second |e eee segment 
equal to or slightly greater than dis- 
tance between tip of tylus and pos- 
terior margin of pronotum; length 
4.000 oo brunneus, p. 123 
12. Length of second antennal segment 
distinctly greater than distance be- 
tween tip of tylus and posterior mar- 
gin of pronotum; clavus with a dis- 
tinctly darker area bordering scutel- 
lum and commissure; length 4.50- 
5.00. ee clavatus, p. 124 
Length of second antennal segment 
equal to or only slightly greater 
than distance between tip of tylus 
and posterior margin of pronotum; 
clavus same brown color as corium; 
length 3.70-3.90 @eae setiger, p. 124 
Pilophorus vanduzeei Knight 
Pilophorus vanduzeei Knight (1923d, p. 540). 
Mace.—Length 5.00, width 1.66. Head 
width 1.25, vertex 0.66, from tip of tylus 
to basal margin of head 1.11; sharp basal 
margin of vertex beset with six black 
bristles, front sparsely clothed with silvery, 
deciduous and scalelike hairs, which are 
interspersed with erect bristles. Rostrum, 
length 2.27, scarcely attaining hind margin 
of middle coxae. Antennae, first segment, 
length 0.44, thickness 0.11; second, length 
2.22, gradually thickened from base toward 
apex (0.15 thick), dark brownish black, 
clothed with short black pubescence; third, 
length 0.80, thickness 0.08, uniformly black; 
fourth, length 0.72, pale, infuscated apically. 
Pronotum, length 0.94, width at base 1.53, 
anterior angles 0.83; anterior half of disk 
sparsely clothed with silvery, deciduous pu- 
bescence quite similar to that on front of 
head. Scutellum with apical half and slen- 
der lateral margins flat, abruptly convex 
on basal half but flattened basally, flattened 
apical half more or less covered with silvery, 
scalelike pubescence. Hemelytra, dark fus- 
