144 — HETEROMERA. 
marked with piceous in the middle, the labrum, eyes, antenn, and tips of the mandibles piceous; the 
prothorax flavous, with a median vitta (narrowing a little behind and not quite reaching the base) and the 
sides very narrowly (the piceous marking on the flanks just visible from above) piceous; the elytra piceous, 
each with a rather broad pale flavous vitta on the disc near the suture. Head very finely and thickly . 
punctured ; prothorax rather convex, transverse, not so wide as the head, scarcely narrower at the apex 
than at the base, the sides a little sinuate behind and feebly rounded, the disc with a long deep oblique 
depression on either side behind the middle (the depressions separated from each other by a median ridge), 
a transverse depression on each side in front, and a deep transverse one in the centre at the base, the 
basal and apical margins raised, the former grooved within and slightly emarginate in the middle, the 
surface very finely and closely punctured ; elytra a little flattened on the disc, longitudinally grooved at 
the base near the shoulders, and with a sharp carina below the latter running parallel with the lateral 
margin nearly to the apex, the suture also sharply raised, the surface very finely and closely punctured ; 
beneath densely punctured, piceous, the prothorax (except the flanks) and the venter (except the hind 
margins and sides of the segments) more or less flavous or testaceous; legs flavous or testaceous, the 
tibiz and tarsi and the tips of the four hinder femora brownish or piceous. 
Length 4-43 millim. (<¢.) 
Hab. Mexico (Sallé); Guatemata, Sinanja in Vera Paz (Champion); Panama, 
Bugaba (Champion). 
One example only from each locality. The specimen from Bugaba is immature and 
has the head and thorax flavous, the elytral vitta much broader, and the depressions on 
the thorax shallow. The elytra do not exhibit the slightest trace of impressed or 
raised lines on the disc, though the suture is sharply raised and there is a sharp carina 
running along the side close to the lateral margin. 
COPIDITA. 
Copidita, Leconte, New Species Col. p. 164 (1866). 
~ Numerous species from Central America are provisionally referred to Copidita. 
They chiefly differ from the type of the genus, C. quadrimaculata (Motsch.), from 
Sitkha and California, a male example of which is contained in the British Museum, 
in having comparatively shorter elytra and less elongate antenne, and the fifth ventral 
segment unemarginate laterally in the male; and from Osacis in the bifid mandibles. 
The form of the head, eyes, and thorax is similar to that of Oxacis; the eyes, as in the 
type, are coarsely granulated (in one species, C. nigripennis, they are much more finely 
granulated); the penultimate joint of the tarsi (as in the type) is spongy-tomentose 
beneath ; the claws are feebly dilated at the base; the antenne have eleven joints in 
both sexes, the eleventh constricted or emarginate at the middle, the first about as long 
as the third. Numerous undescribed species from Tropical South America, the 
Antilles, Tahiti, &c. are, no doubt, congeneric with those from Central America; but 
of the various species from the Antilles referred to Copidita by Mr. C. O. Waterhouse, 
probably one only, C. dateralis, having bifid mandibles, really belongs to it as here 
understood. 
