216 Memoirs on the Coleoptera 



proceeds posteriorly a fine impressed line, curving outwardly and 

 obsolete before attaining the coxae. This is a decidedly remarkable 

 species. 



Reveniopsis n. gen. 



This genus apparently belongs near the preceding genera, but 

 the mandibles, though non-decussate and prominent when closed, 

 have their inner edges not perfectly straight but subdenticulately 

 crenate. The beak is rather thick, compressed and laterally 

 strongly, closely punctate basally, rather slender, cylindric and 

 smoother distally, somewhat broadly convex above, with a fine 

 carina at each side, and with the punctures arranged in regular, 

 widely spaced series; it is separated from the head by a rather deep 

 reentrant angle; antennae medial, the first funicular joint as long 

 as the next two, the second also somewhat elongate, the outer 

 joints gradually wider, compact, the club short, oval, gradual and 

 not as long as the preceding three joints. The prosternum is 

 peculiar, having an elongate-oval parallel area, coarsely, densely 

 punctate, flat and with smooth beaded periphery, extending be- 

 tween and rather widely separating the coxae. The legs are normal, 

 the claws long, free and divergent. The prothorax is deeply 

 constricted at apex, the tubulation very abrupt and with parallel 

 sides, the scutellum small, transversely quadrate and in close 

 contact with the elytra, the latter deeply and abruptly grooved. 

 The type is the following: 



Reveniopsis seriatirostris n. sp. — Somewhat broadly, obtusely oval, convex, 

 polished black and glabrous throughout; beak ( 9 ) thick, evenly and moderately 

 arcuate and a third longer than the head and prothorax, the antennse piceous; 

 prothorax fully two-fifths wider than long, the sides distinctly converging, very 

 evenly and feebly arcuate from base to apex, where they are abruptly turned 

 inward, becoming transverse for a short distance to the tubulation, which is 

 truncate, distinctly punctured and less than half as wide as the base; surface 

 smooth, becoming sparsely and rather finely punctured at the sides, these punc- 

 tures each with a very minute dark erect hair; basal lobe well developed, some- 

 what long and cuspidiform, with the apex broadly obtuse; lateral impressions 

 at base very feeble; elytra oval, with strongly arcuate sides and moderately 

 narrow apex, barely at all longer than wide, a fifth wider than the prothorax 

 and twice as long, the humeri slightly prominent; grooves deep, a fourth as wide 

 as the intervals, which have single series of extremely minute punctules, becoming 

 larger and somewhat strong laterally; abdomen convex, with fine sparse punc- 

 tures, rather coarse and close latero-basally. Length 4.0 mm.; width 2.6 mm. 

 Brazil. A single female, sent by Desbrochers des Loges, who stated that he had 

 received it under the name "lugubris Dej." 



This interesting generic type can be identified easily by the very 

 abruptly tubulate prothorax, glabrous surface and very peculiar 

 structure of the prosternum; the rather thick beak is relatively 

 longer than in most of the preceding genera of this section. 



