336 HETEROMERA. 
broader than long; elytra moderately elongate, subparallel in their basal half; beneath in great part 
cinereo-pubescent ; pygidium comparatively stout, moderately long, shorter and blunter in some examples, 
about twice the length of the hypopygium ; the hind tibie and the first joint of the hind tarsi each with 
two (rarely three) short, faint, oblique ridges near the tip, the second joint of the hind tarsi with one or 
two ridges. 
Length to end of the elytra 2-3, to tip of the pygidium 24-31, millim. (¢ 2.) 
Hab. Mexico, Saltillo in Coahuila (Dr. Palmer), Chilpancingo, Xucumanatlan, 
Mexico city (H. H. Smith), Puebla, Guanajuato (Sallé), Tupataro (Hége), Amecameca 
(Flohr). 
Not uncommon in Central and Northern Mexico, whence we have received numerous 
examples. I am unable to identify the species with any of those described from North 
America. ‘The pygidium varies in length, it being shorter and stouter in some males 
than in others. The legs, antenne, and palpi are black. 
47. Mordellistena dispersa. 
Broader, larger, and more robust than M. sparsa; the upper surface with a brassy lustre; the antenne, palpi, 
and legs similar in form and colour; the dense coarse pubescence consisting of intermixed dark brown and 
yellowish-cinereous hairs, the light-coloured hairs on the elytra not forming distinct, transverse, irregular 
patches, but seattered here and there (as on the prothorax) over the surface ; head large and broad, almost 
as wide as the prothorax, the latter broad, strongly transverse; the pygidium stout, conical, short; the 
hind tibie and the first joint of the hind tarsi each with four, the second joint of the hind tarsi with two, 
short oblique ridges. 
Length to end of the elytra 34, to tip of the pygidium 43, millim. (@.) 
Hab. Mexico, Amula in Guerrero 6000 feet (7. H. Smith). 
One specimen only, apparently quite distinct from M/. sparsa. The pubescence 
consists of intermixed dark brown (not black) and yellowish-cinereous hairs, the latter 
showing no tendency to form transverse fascicles on the elytra as in W/. sparsa; the 
carine on the hind legs are also more numerous. 
48. Mordellistena tessellata. (Tab. XV. figg. 5, ¢; 5a, maxillary palpus.) 
Moderately elongate, very narrow, subparallel, above and beneath black, the pubescence dense and rather 
coarse ; the elytra with numerous rather large, transverse or oblique, patches of cinereous hair, these 
patches tending to form irregular fascie, for the rest black-pubescent; the pubescence on the head and 
prothorax, and at the base of the pygidium, partly cinereous. Head very convex ; maxillary palpi (¢ ) 
piceous with the basal joints paler, the apical joint very long, stout, and cultriform; antennz (¢ ) mode- 
rately long, slender, filiform, piceous, the four basal joints flavo-testaceous, joints 3 and 4 subequal, 
5 considerably longer but not much stouter than 4, 5-10 equal in length and breadth, much longer than 
broad, 11 very much longer than 10; prothorax a little broader than long; pygidium moderately elon- 
gate; legs black, the anterior cox flavo-testaceous, the hind tibial spurs piceous; the hind tibie with 
three, the first and second joints of the hind tarsi each with two, very short oblique ridges near the tip. 
Length to end of the elytra 14, to tip of the pygidium 27, millim.; breadth 3 millim. (¢.) 
Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith). 
One male example only of this minute species has been received. Very like J. sparsa, 
but easily separable from the same sex of that insect by the much more elongate apical 
