143 
21 Thoracic punctuation moderate; club of male antenna much shorter 
titiSiii stj0in •••*•••« .... .... 
Thoracic punctuation very coarse; club of male antenna about as long 
as stem. 
22 Penultimate ventral of male granulate and feebly impressed posteriorly 
feebly elevated in front, elevation continued by plications extending 
obliquely backward on each side; claspers large, expanded, with 
rounded posterior outline; thoracic punctures more or less sparse. 
15-18 mm. fraterna, Harr. 
Penultimate ventrai of maie similarly sculptured, but the elevation 
stronger and shorter, forming with the lateral oblique extensions an 
approach to an acute ridge; claspers small, deeply emarginate behind; 
thoracic punctures sparse, leaving irregular smooth spaces on the 
disk. 15-17 mm. nova, Smith. 
23 Penultimate ventral of male with a semicircular elevation in front of 
a deep smooth fovea; thorax broadest at base with a smooth space 
each side of middle. 16.5-21.5 mm.. marginalis, Lee. 
Penultimate ventral of male with the posterior border vertical at 
middle, horizontal portion obliquely plicate each side; thorax widest 
at middle, obtusely angulate, punctures moderately close, sparser at 
sides of middle. 17-20 mm. corrosa, Lee. 
Penultimate ventral broadly impressed and granulate at middle, form¬ 
ing an oblique declivity, at each end of which is an obtuse elevation; 
thorax widest at middle, subangulate. 24 
24 Thorax with punctures irregularly confluent, a distinctly elevated smooth 
median line; last ventral of male with apex acutely emarginate. 
21.5-23.5 mm. . . .knochu, Gyll. 
Thorax with punctures dense, but not confluent, median line some¬ 
times smoother; last ventral of male with a broad triangular emar- 
gination, closed by membrane, at apex. 18-23 mm. rugosa, Mels. 
Sutural stria deeply impressed, sutural costa normal.26 
Sutural stria feeble or wanting, sutural costa scarcely elevated.29 
Form more or less ovate, head and thorax darker than elytra.27 
Form elongate, parallel, color uniform. 
Last ventral of male convex, penultimate with a subcircular rugose 
depression, limited in front by a small narrow arcuate elevation, 
feeble at middle, on each side more distinctly and sharply elevated, 
extending obliquely outwards; clypeus deeply and acutely emarginate, 
front glabrous; thoracic punctures moderately coarse,_ rather sparse. 
2^. i'j ^ ro id... %YYtjp\%Cht(L ^ Horn* 
Last ventral of male with smooth cupuliform depression, penultimate 
with elongate concavity at middle along hind margin, in front of 
which is a short obtuse punctate arcuate elevation; front with erect 
hairs, clypeus broadly not deeply emarginate; thoracic punctures 
rather coarse and sparse, irregularly placed, 15-16 mm.... balia, Say.' 
Last ventral of male broadly concave, penultimate with a feeble arcu¬ 
ate elevation; front with short erect hairs, clypeus deeply emargi¬ 
nate; thoracic punctures coarse and deep, sparsely and irregularly 
placed, often leaving large smooth spaces. 14.5-16 mm.. villifrons , Lee. 
Last ventral of male concave, penultimate with an obtuse transverse 
ridge divided by a depression at middle; rufotestaceous; clypeus 
emarginate; thorax moderately coarsely punctate, not closely, but 
somewhat irregularly. 14-18 mm. limula , Horn. 
Hind tibia of male with one spur fixed.jj* 
31 Surface with erect hairs, those of elytra in rows (sometimes indistinct 
from rubbing); base of thorax channeled each side; penultimate ven¬ 
tral of male with a broad and long transverse impression, limited at 
each end by a smooth oblique plica, space in front slightly elevated, 
last ventral broadly concave; clypeus emarginate; thorax variolately 
and irregularly punctate. 16.5-19 mm. flirt tula, Knoch. 
25 
26 
28 
29 
30 
