HETEROMERA. 567 
front, deeply bisinuate at the base, the marginal carina not visible from above, the base finely margined ; 
scutellum strongly transverse ; elytra oblong-oval, much wider than the prothorax, very feebly margined 
at the sides (the margin not visible from above); legs rather short, moderately stout; anterior and inter- 
mediate tarsi with the third and fourth joints, and the hind tarsi with the penultimate joint, lobed 
beneath ; the basal joint of the hind tarsi very elongate, much longer than the other joints united; claws 
pectinate; prosternum abruptly declivous behind ; intercoxal process of the abdomen narrow ; epipleure 
extending narrowly to the apex; body elongate, narrow, obovate, densely pubescent, winged. 
This genus is proposed for a remarkable Cistelid from Western Mexico. It is allied 
to Hymenorus, but differs from it in having the thorax elongate, subcylindrical, and 
narrow, much narrower than the elytra and very little wider than the head. The 
single specimen received is, no doubt, of the male sex, the eyes being exceedingly 
large. In the form of the thorax it approaches Hymenorus longicollis. 
1. Hianes angusticollis. (Tab. XXIII. fig. 20.) 
Moderately convex, pitchy-brown, feebly shining, thickly clothed with coarse, decumbent hairs. Head closely 
punctured in front, sparsely so behind, the middle of the vertex smooth, the eyes black, narrowly sepa- 
rated, the palpi rufo-testaceous; antenne ferruginous; prothorax distinctly longer than broad, parallel 
for three-fourths of its length, the sides feebly rounded in front, the hind angles subrectangular, the entire 
surface very densely, finely punctate ; elytra oblong-oval, barely three times as long as, and much broader 
than, the prothorax, widest about the middle, punctate-striate, the punctures very closely placed, shallow, 
and rather coarse, the interstices almost flat, very thickly punctured, densely so towards the base ; 
beneath shining, thickly, rather coarsely punctate, the punctures on the venter finer; legs ferruginous, 
the femora slightly infuscate, the tarsi paler. 
Length 63, breadth 2} millim. 
Hab. Mexico, Acapulco (Lohr). 
One specimen. 
AMAROPSIS. (To follow the genus Pitholaus, p. 446.) 
2. Last joint of the maxillary palpi elongate-triangular, its apical and outer sides about equal in length, each 
very much longer than the inner side; head small ; eyes comparatively small, rounded (if viewed from 
above), very widely separated, feebly emarginate, and rather finely granulated; antenne elongate, 
exceedingly slender, joint 1 stout, 2 very short, 3 considerably shorter than 4, 4-11 elongate, gradually 
increasing in length, and a little dilated on the inner side towards the tip; prothorax transverse, 
nearly twice as wide as the head, parallel at the sides behind, moderately convex, finely margined (the 
carina visible from above), truncate in front, bisinuate at the base, and with distinct basal foves ; 
scutellum transversely triangular ; elytra rather depressed, much wider than, and about three and a half 
times as long as, the prothorax, subparallel in their basal half, with the humeri rounded ; legs moderately 
long, very slender ; anterior and intermediate tarsi with the third and fourth joints, and the hind tarsi 
with the penultimate joint, lobed beneath ; the basal joint of the hind tarsi longer than the other joints 
united; claws pectinate; prosternum abruptly declivous behind; intercoxal process. of the abdomen 
narrow, triangular; epipleure extending narrowly to the apex; body oblong-oval, rather depressed, 
glabrous, metallic, winged. 
The single species for which this genus is proposed has the facies of a small Amara. 
It approaches the European Gonodera, Muls., from which it may be known by the 
lobed penultimate joint of the tarsi, the relatively longer basal joint of the hind tarsi, 
the very slender limbs, &c. 
4DD2 
