428 Memoirs on the Coleoptera 



in any of the preceding, the striae much coarser, especially toward the sides 

 and somewhat coarsely, closely and not linearly punctate throughout, the 

 intervals with the minute sparse punctures very distinct and unilineate; 

 pygidium nearly similar and loosely punctate; under surface very coarsely 

 punctate, the abdomen smooth medially, the fifth segment in the type with 

 the apical margin slightly thickened and bordered medially by a narrow 

 eroded line; prosternal lobe broadly and deeply impressed medially. Length 

 3.35 mm.; width 2.25 mm. Mexico (Frontera in Tabasco), — Townsend. 

 One specimen, apparently female convexa n. sp. 



Of the two species described by Mr. Champion, the Mexican 

 ceruginosa is subopaque above, and, in the Guatemalan viridicolor, 

 the surface above is said to be somewhat flattened and the pro- 

 thorax moderately convex and gradually narrowed from base to the 

 abrupt tubulation. I am uncertain whether or not the black 

 coloration in the single type of incerta may be due to accidental 

 causes, but the punctuation is much finer. As in many other 

 large genera of the Barinae, the species of Eurhinus and Eurhinopsis, 

 although widely distributed through the neotropics, seem to be 

 unknown along the immediate Pacific coastal regions. 



Barycerus Schon. 



In this remarkable genus, which without any doubt at all is 

 allied to the two preceding, the body is oblong-oval, convex, shining 

 and glabrous, the beak very short and thick, not clearly separated 

 by an impression, though with the usual large frontal fovea, very 

 feebly arcuate, strongly sculptured and with long bifid and broadly 

 decussate mandibles. Antennae very short, medial, the funicle and 

 club very broad and flattened, the distal funicular joints very 

 transverse and somewhat overlapping, or with subimbricate arrange- 

 ment, the short and broadly oval, very flat club having arcuate 

 sutures, the first segment half the mass, shining and glabrous. 

 The prosternum is very feebly concave, separating the coxae by but 

 little more than half their width, and with the posterior lobe flat, 

 arcuato-truncate and extending to the mesocoxal tangent. The 

 legs are normal but short, the tarsi narrow and the claws free, 

 arcuate and divergent. The prothorax has the same prominently 

 rounded basal lobe as the preceding genera, but the scutellum is 

 very different, being transversely quadrate, parallel and partially 

 free. The elytra are grooved, the pygidium well developed, trans- 

 verse, vertical, convex and extremely densely punctate and opaque. 

 The type and only known species is the following: 



Barycerus collaris Gyll. — Regularly oblong-suboval, convex, more especially 

 so anteriorly as in all the preceding species, polished, black throughout, the 

 pronotum bright rufous; beak (c?) not quite three-fifths as long as the prothorax, 

 abruptly flattened medially above, the prothorax a third wider than long, evenly 



