50 
14 
15 
16 
18 
19 
20 
21 
Surface opaque, conspicuously pruinose; thoracic punctures distinct, 
sparse, and irregularly placed, median line smoother; penultimate 
ventral of male with short arcuate ridge; fixed spur not long. 
15-17 mm . micans , Enoch. 
Surface shining, not pruinose; thorax not very coarsely or closely punc_- j 
tured. lo 
Transverse ridge short, strongly arcuate; female with last segment i 
emarginate... •••••• ....JJj 
Transverse ridge longer, straight or but slightly curved.19 
Ridge overhanging throughout. 
Ridge not overhanging. 18 
Ends of ridge at extreme hind margin of segment, and overhanging 
the next; clypeus feebly emarginate; oblong oval, rufocastaneous to 
piceous. 19 mm.... .......... • • —. ar^afa, Smith. 
22 
Ends of ridge distant from hind margin of segment; otherwise no 
superficially distinguishable from the preceding. 18-20 mm. 
1 dubia, Smith. 
Ridge small, distinct, the ends as well as the rest of the ridge near : 
the middle of the segment; claspers of male symmetrical; not ditter-i 
ing noticeably from the preceding. insperata, Smith.| 
23 
24 
25 
Ridge slightly curved, ends overhanging, declivous at middle; female 
with last ventral not emarginate; closely resembling the preceding. 
18—22 mm. fused , From.) 
Ridge nearly straight, not overhanging posteriorly, last ventral gran¬ 
ulate-punctate; female with last ventral emarginate; larger and 
more robust; thorax subangulate before the middle- grandis , Smith. 
Thoracic punctuation moderate; club of male antenna much shortei 
stem ....... • • • • 
Thoracic punctuation very coarse; club of male antenna about as long 
as stem. 
Penultimate ventral of male granulate and feebly impressed posterior- 
lv. feeblv elevated in front, elevation continued by plications ex¬ 
tending obliquely backward on each side, claspers large, expanded, 
with rounded posterior outline; thoracic punctures more or lesd 
sparse. 15-18 mm. fraterna, Harr 
Penultimate ventral of male similarly sculptured, but the elevation 
stronger and shorter, forming with the lateral oblique extensions ar 
approach to an acute ridge; claspers small, deeply emarginate be 
hind: thoracic punctures sparse, leaving irregular smooth spaces oi 
the disk. 15-17 mm. nova, Smith 
Penultimate ventral of male with a semicircular elevation in front o 
a deep smooth fovea; thorax broadest at base with a smooth spac<; 
each side of middle. 16.5-21.5 mm... marginahs, Eeq 
Penultimate ventral of male with the posterior border vertical at mid 
die, horizontal portion obliquely plicate each side; thorax widest a 
middle, obtusely angulate, punctures moderately close, sparser a 
sides of middle. 17-20 mm. corrosa ,, Fee 
Penultimate ventral broadly impressed and granulate at middle, torm 
ing an oblique declivity, each side of which is an obtuse elevatior 
thorax widest at middle, subangulate. 2c j 
Thorax with punctures irregularly confluent,. a distinctly elevate 
smooth median line: last ventral of male with apex acutely ema,5 
ginate. 21.5-23.5 mm. . .knochii, Hyi 
Thorax with punctures dense, but not confluent, median line somt 
times smoother; last ventral of male with a broad triangular 
gination, closed by membrane, at apex. 18-23 mm. rugosa, Met 
Sutural stria deeply impressed, sutural costa normal........... . 
Sutural stria feeble or wanting, sutural costa scarcely elevated-a 
Form more or less ovate, head and. thorax darker than elytra. 
Form elongate, parallel, color uniform. 
