September, 1941 KNIGHT: 
as long as either first or third seg- 
Poet sOLenearly SO 40 24 Aes ante te: 3 
CAA AY 
~ 
X 
N 
. 
wal pve HMA cc 
Fig. 104.—Head and pronotum of Eustictus 
salicicola. 
3. Head strongly produced and nearly 
- horizontal, facial angle acute, tylus 
projecting beyond apex of first an- 
tennal segment, fig. 108; emboliar 
margin thin and broadly expanded, 
Beseheariy patallel i 2. 2S. 2. 
ioe a Eurychilopterella, p. 73 
Head less produced, scarcely surpassing 
middle of first antennal segment, fig. 
107, facial angle either one of 90 
degrees or only slightly less; embo- 
PgenCl as ABOVE sts: chat. a» 
Eustictus Reuter 
KEY LOPSPECIES 
1. Hind tibiae with long, fine hairs on 
basal half, these hairs distinctly 
feueertham true spines..-.-...<..- Dp 
Hind tibiae with minute pubescence on 
basal half, these hairs not so long as 
BUCESDINCS. Win bi So agi ke asta sees 3 
2. Pronotal disk uniformly very dark 
brown; legs chiefly reddish, tibiae 
without paler bands; length 8.00— 
OE ee filicornis, p. 66 
Pronotal disk black, but paler near 
basal margin; legs pale testaceous 
and marked with black, tibiae dis- 
tinctly marked with four alternating 
Paterand fuscous bands.2........°. 
. 1 ee venatorius, p. 66 
3. Pronotal disk with median portion 
black; broad, pale areas with dark 
punctures present at lateral margins; 
width of vertex of male only slightly 
greater than thickness of first an-. 
tennal segment; length, male 6.90, 
Female f740. on. see on salicicola, p. 65 
Pronotal disk chiefly dark brown, not 
PLANT Bucs, or MiriIpAE, oF ILLINOIS 65 
paler at lateral margins; width of 
vertex of male twice as great as thick- 
ness of first antennal segment; 
length, male 5.50-6.00, female 7.00 
bg OF ch oGAEs ONG TD AES necopinus, p. 66 
Eustictus salicicola Knight 
Eustictus salicicola Knight (1923d, p. 482). 
This is allied to venatorius Van Duzee, 
but differs in the form of its antennae, its 
tibial pubescence and the color pattern of 
the dorsum. 
Matre.—Fig. 105. Length 6.90, width 
2.40. Head width 1.19, vertex 0.08, height 
of eye 0.77; eyes prominent, projecting above 
Fig. 105.— Eustictus salicicola, o. 
vertex and below gula. Rostrum, length 
2.77, attaining posterior margins of hind 
coxae. Antennae, first segment, length 0.81, 
pale, marked with black; second, 2.31, dark 
fuscous, paler on basal one-sixth but with 
faint dark spots, extreme apex paler, rather 
densely covered with fine, short, pale pubes- 
cence, a few hairs slightly longer, but none 
exceeding thickness of segment; third, 1.05, 
black, paler apically; fourth, 0.91, black. 
Pronotum, length 1.25, width at base 2.00; 
