MORDELLISTENA. 331 
collts, from which it may be separated by the less transverse thorax and by the coarser 
elytral pubescence, the latter with intermixed black hairs. MW. nigripilis has a longer 
thorax and the elytral pubescence black. In the Sallé collection the two specimens 
(3) of the variety are labelled WM. rubronotata, Dugés; and some of those with the 
thorax black are ticketed M. luteifrons, Dugés. The head is usually very broad in 
both sexes, but in three examples collected by Hége it is smaller and narrower. 
37. Mordellistena nigripilis. 
Moderately elongate, somewhat cuneiform, above and beneath black, the anterior part of the head sometimes 
reddish-testaceous ; the pubescence on the elytra uniformly black, that on the prothorax blackish-brown. 
Palpi black or piceous, the basal joints sometimes paler, the apical joint of the maxillary pair elongate- 
triangular ; antenne moderately long in the male, shorter in the female, black, joints 3 and 4 short, 
subequal, 5 much longer and stouter than 4, 5-10 longer than broad in the male, almost as broad as long 
in the female; prothorax not much broader than long; elytra moderately elongate; beneath brownish- 
cinereous-pubescent ; pygidium moderately long in the male, shorter in the female, about twice the length 
of the hypopygium ; legs black, the hind tibial spurs testaceous; the hind tibia and the first joint of the 
hind tarsi each with three, the second joint of the hind tarsi with two, short, parallel, oblique ridges. 
Var. The head and prothorax broadly reddish-testaceous in front; the anterior coxee, and sometimes the 
anterior femora also, testaceous ; the elytra with a little brownish-cinereous pubescence at the extreme 
base. 
Length to end of the elytra 23-33, to tip of the pygidium 34-4, millim. (¢ 9.) 
Hab. Mexico, Amula, Chilpancingo, Tepetlapa, Acaguizotla (ZZ. H. Smith), Tupa- 
taro ({Hége). 
Six examples of the type, three of the variety. Very near I. luteifrons, but differing 
from that species in the less transverse thorax and the black elytral pubescence. 
38. Mordellistena laticollis. (Tab. XIV. figg. 25, ¢ ; 25a, maxillary palpus, 
$3; 256, maxillary palpus, @ .) 
Moderately elongate, slightly cuneiform; the head flavo- or reddish-testaceous, with a sharply-defined black 
patch on the vertex (not quite reaching the eyes or occiput), in one example black with nearly the anterior 
half flavous; the prothorax black, with the anterior half, or nearly so, abruptly flavo-testaceous (the black 
colour extending a little forwards on the middle of the disc), the apex in the middle sometimes marked 
with black ; the scutellum, elytra, and pygidium black, the elytra in one example with the lateral margins 
posteriorly and the apex brownish ; the pubescence on the dark parts brownish-cinereous, paler elsewhere. 
Head short and broad, strongly transverse, the eyes rather large ; maxillary palpi testaceous, stout in the 
male, more slender in the female, the last joint in the male stout and triangular, and with its inner and 
apical sides equal in length—in the female considerably narrower,—the second joint also stout in the 
male ; antenne very short in both sexes, black, the basal four joints obscure testaceous, joints 3 and 4 
narrow, subequal, 5-11 a little thickened, 5 longer and stouter than 4, 8-10 nearly as broad as long in 
the female; prothorax short, very strongly transverse, narrowed behind, the hind angles rather obtuse ; 
elytra moderately long; beneath, the head and prothorax excepted, black, the pubescence brownish- 
cinereous; pygidium slender and moderately long in the male, short and conical in the female ; anterior 
and middle femora and tibize, and the hind tibial spurs, testaceous, the rest of the legs usually in great 
part piceous or black; the hind tibie and the first joint of the hind tarsi each with three or four, the 
second joint of the hind tarsi with one or two, short, faint, oblique ridges. 
Length to end of the elytra 3, to tip of the pygidium 33, millim. (d 9 .) 
2UU 2 
