EURHINOPSIS.—STETHOBAROIDES. 399 
from Colombia, the type of which I have seen, is not unlike the present insect, but it 
is congeneric with 2. cyaneus, Gyll. 
STETHOBAROIDES, gen. nov. 
Mandibles decussate ; rostrum arcuate, moderately long, the antenne inserted behind the middle, the club 
acuminate-ovate ; prothorax transverse, subconical, abruptly constricted and tubulate in front, feebly 
bisinuate at the base, the median lobe emarginate ; scutellum free, oblong, narrow, puarallel-sided; elytra 
rounded-triangular, with obliquely truncated humeri, leaving the upper portion of the mesothoracic 
epimera exposed, sharply crenate-striate, separately rounded at the apex; pygidium exposed, transverse, 
subvertical ; prosternum (fig. 35) deeply sulcate, the sulcus widening tv the anterior cuxe, and then 
narrowed and margined between them, the basal process short; anterior cox separated by about one- 
half, and the intermediate and posterior coxw by nearly twice, their own width; mesosternum depressed, 
exposed, connate with the metasternum ; ventral segments | and 2 connate in their median third; femora 
sublinear, unarmed ; tibie strongly unguiculate; tarsal claws minute, narrowly separated; body sub- 
rhomboidal, flattened and glabrous above. 
Type, S. nudiventris. 
A genus including two closely allied species. ‘The type superficially resembles the 
North-American Stethobaris ovata, Lec.*, but differs from it in the fully exposed 
pygidium, the more approximate anterior cox, the long, parallel-sided scutellum, the 
obliquely truncated humeri, the less elongate antennal club, &c. 
1. Stethobaroides nudiventris, sp.n. (Tab. XX. figg. 3, 3a, b, 6.) 
Black, shining, the elytra very finely alutaceous. Head finely punctate, shallowly transversely grooved or 
feebly foveate between the eyes; rostrum in the ¢ moderately stout, about as long as the head and 
prothorax, and closely striato-punctate to the tip, in the 2 longer, smoother, and more slender, the 
antenne inserted just behind the middle in the ¢ and at the basal third in the 9. Prothorax strongly 
transverse, rapidly narrowed from the base; somewhat closely punctate, except along the median line, 
the punctures fine on the disc and coarse at the sides. Scutellum smooth, canaliculate. Elytra depressed 
along the suture, the crenate striz deep aud sulciform, the interstices flat, broad on the disc, narrower 
at the sides, and obsoletely seriate-punctate. Beneath almost glabrous, coarsely and closely, the ventral 
segments 1-4 very sparsely and finely, punctate. 
3. Metasternum broadly excavate, and the first ventral segment slightly depressed, in the middle, and the 
fifth segment usually with a deep central fovea. 
Length 22-34, breadth 13-1} millim. (¢ 9.) 
Hab. Mexico, Toxpam in Vera Cruz (Sallé; Mus. Dresden); British Honpburas, 
Belize, Rio Hondo (Blancaneaurx).—Cotomsia (Jus. Brit.). 
Numerous examples, one of the males wanting the fovea on the fifth ventral 
segment. 
9. Stethobaroides piliventris, sp.n. (Tab. XX. figg. 4, 4a, 3.) 
3. Very like S. nudiventris, but larger and more elongate; the rostrum more elongate (as long as in the @ of 
S. nudiventris); the prothorax very sparsely and minutely punctate on the disc; the elytra relatively 
longer, more gradually narrowed from the base, transversely depressed on the disc at a little beyond the 
* Elliptobaris nudicollis (antea, p. 251) is not unlike S. ovata, but it has long, divergent tarsal claws, 
setulose elytra, &c. 
