98 HETEROMERA. 
the lateral margin, and more or less dilated at the base and apex, leaving two large 
lateral spots flavous or fulvous, is described by Chevrolat as rufous: in our specimens 
the spots are each surrounded by a rather broad piceous line, the space within the 
piceous lines being rufous. 
CONOMORPHUS. 
Last joint of the maxillary palpi long, nearly twice as long as the third, moderately broad, subsecuriform, and 
with its apical side about as long as the inner, and very much shorter than the outer side, that of 
the labial palpi long, widening outwardly, and with its apex subtruncate ; mentum transverse, broadest 
behind, the anterior angles somewhat obtuse ; maxilla with the inner lobe largely developed and broad ; 
mandibles with the apex broad and feebly bifid; head large, slightly narrowed behind, the epistoma 
not defined, the antennary orbits very little raised (more distinct in C. gracilicornis) ; eyes moderately 
convex, rounded, entire, exceedingly large, and occupying the whole of the side of the head, narrowly or 
widely separated above, much more distant beneath; antennw more or less slender, in some species 
scarcely reaching the base of the prothorax, and in others extending beyond it, joint 3 twice as long 
as 2, 4 shorter than 3, joints 4-10 usually decreasing in length and increasing in width (in some species 
becoming triangular), each widening towards their apex, 11 ovate, somewhat pointed, and much longer 
than 10; prothorax as long as or longer than broad, subquadrate, subcylindrical, usually a little 
flattened on the disc, the sides immarginate or very obsoletely margined behind, the base feebly bisinuate 
or nearly straight, and with more or less distinct fovex, the fovee connected by a basilar groove; 
scutellum flat, transverse, or as long as broad; elytra exceedingly long, wider than the prothorax at the 
base, usually widest at or beyond the middle, the humeri rounded ; anterior cox cylindrical, strongly 
exserted, contiguous, the cavities open behind, but closed laterally ; mesosternum long, broadly and 
largely extended anteriorly, and closing the anterior coxal cavities, the coxe rather narrowly separated, 
the cavities closed; metasternum long, largely developed and convex, without median groove; posterior 
coxse transverse, rather widely separated by the produced and acutely triangular intercoxal process ; 
abdomen with five visible segments, the third and fourth with coriaceous hind margin ; legs moderately 
long; the penultimate joint of all the tarsi broadly lobed beneath; tibial spurs small, the first joint of 
the hind tarsi about as long as or rather longer than the following joints united; claws with the basal 
half broadly and angularly dilated within; body very elongate, widest behind and subconical, or sub- 
cylindrical, winged. 
This genus so closely resembles Stilpnonotus (= Calophthalmus, Thoms.), that it is 
with considerable hesitation I refer it to a different family, the open anterior coxal 
cavities notwithstanding (not easily seen unless the prothorax is detached); the only 
other apparent discrepancies between Conomorphus and Stilpnonotus being the more 
slender antenne, more convex eyes, and flat scutellum, and in the thorax having more 
or less distinct basal foveze, the latter connected by a basilar groove. The open 
anterior coxal cavities being regarded by most authors as a character of paramount 
importance for the purposes of classification, these genera are here referred to different 
families: but at the same time it is necessary to call attention to these closely allied 
forms, the one with open, the other with closed cavities. Conomorphus approaches 
Eurypus in some of its characters, from which it differs in its more conical and more 
cylindrical shape, more slender antenne, larger and less convex eyes, &c.; and in 
general facies it somewhat resembles Boros, a genus of Pythide. I include in it three 
species from Central America and two from Parana (one of which is described in a 
