Memoirs on the coleoptera

240
MEMOIRS ON THE COLEOPTERA
the base; prothorax strongly transverse, four-fifths as wide as the
elytra, the median teeth very stout, rapidly finely acuminate and
notably reflexed or hamate; punctures numerous, fine but deep;
scutellum broadly angulate at tip; elytra two-thirds longer than
wide, finely but strongly, rather sparsely punctate, the two inner
raised lines feeble; sides of the apical abdominal sinus (cf ) tumid on
the surface; tarsi unusually stout. Length (cf) 47.0 mm.; width
18.2 mm.; length and width of prothorax 6.2X15.0 mm.; width of
head 8.2 mm. Texas (El Paso), Dunn. [P. curvatus Lee., Col.
.curvatus Lee.
of Kansas and East. N. M., 1859, p. 19, Santa Fe] .
Head and prothorax smaller, the latter similarly very transverse 17
17 Lateral teeth of the prothorax long, very slender and spiculiform.
Body large, very stout, rufo-castaneous, the head and prothorax
piceous-black, convex, shining; head moderate, nearly as in curvatus;
antennae (9) slender, three-fifths as long as the body, the last
joint more than three times as long as wide, distinctly longer than
the preceding, the inner face beveled at tip and with a small pit at
the summit of the bevel; eyes separated by three-fourths their width;
prothorax more convex than in the others of this group and with
more numerous and stronger punctures, the long and very slender
anterior and middle teeth not or scarcely at all reflexed; scutellum
large, very obtuse; elytra three-fifths longer than wide, a third wider
than the prothorax, tapering but feebly, the apices broadly rounded,
the marginal impression just behind the humeri unusually developed,
the two inner raised lines very feeble; punctures fine and everywhere
sparse; tarsi rather slender, the canaliculation deep and dis-
tinct on the two posterior pairs. Length (9 ) 47-O mm.; width 20.0
mm.; length and width of prothorax (as here uniformly measured
from the apices of the middle teeth) 6.6X15.7 mm.; width of head
8.2 mm. Arizona (Grand Canon of the Colorado), T. Mitchell
Prudden spiculosus n. sp.
Lateral teeth acute and finely pointed but shorter and not . spiculiform. 18
18 Form moderately stout, convex, rather shining, piceous-black to
dark castaneous, the head (cf ) nearly as in curvatus but not quite
so large, or ( 9 ) notably small, the eyes nearly as in that species, the
antennae (cf ) not quite so stout basally, the last joint evenly elongateoval,
three times as long as wide and very much shorter than the
preceding, or ( 9 ) unusually slender, but feebly serrate distally,
with the last joint as in the male though only a little more than
twice as long as wide, unmodified on the inner face and much shorter
than the preceding; prothorax nearly as in spiculosus in general
form, rather strongly punctate; scutellum very obtuse; elytra twothirds
(cf ) to four-fifths (9 ) longer than wide, the punctures rather
small and sparse but strong and conspicuously impressed; tarsi
rather slender, canaliculate as in spiculosus; surface at the ends of
the apical abdominal sinus (cf ) not tumid as in curvatus. Length
(cf) 35-0-39-5. (9) 37-Q-43-Q mm.; width (cf) 14.5-16.2, (9)
13.8-17.0 mm.; length and width of prothorax (cf, 9) 5.5X10.0
mm.; width of head (cf) 6.8-7.5, (9) 6.0-6.8 mm. Colorado
(Boulder Co.). Abundant censors n. sp.