366 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM 



and second abdominal sternites absent, seventh generally not modi- 

 fied, eighth emarginate in male; tarsi 5-segmented, fourth segment 

 lobed beneath. 



Remarks. — This large genus is well represented in all parts of 

 Ajnerica. It is easily recognizable by its slender form and apically 

 enlarged abdomen. The subgenera that have been named are not 

 sufficiently well known to me to permit me to place the West Indian 

 species in their proper positions. 



I have seen from the We^t Indies 67 specimens, representing 

 3 species. 



KEY TO WEST INDIAN SPECIES OF ASTENUS 



1. Supraantennal ridge joining upper margin of eye as a distinct Binooili line. 



3. juvus 

 Supraantennal ridgo not reacliiug to upper uiargin of eye 2 



2. Elytra maculate or bicolored 2. cubensis 



Elytra not maculate, unicolorous 1. cinctiventris 



1. ASTENUS CINCTIVENTRIS (Sharp) 



Bunius citictiventris Sharp, 188C, p. 601. 



Astenus citictiventris (Sliarp) Bebnhauer and Schubi rt, 1912, p. 215. — Biebig, 

 1833, p. 517. 



Description. — Rufotestaceous to testaceous, usually with indefinite 

 piceous or cloudy areas on head and pronotum, and seventh abdominal 

 tergite piceous except at apex. Head slightly longer than broad; 

 eyes at about their length from the neck; sides evenly and strongly 

 rounded to base; with dense umbilicate punctures indistinct, obscured 

 in front by ground sculpture; a band of ground sculpture separating 

 the punctures from the front edge of clypeus; supraantennal ridge 

 disappearing before the eye; beneath with rather coarse abrupt punc- 

 tures; ground sculpture strong in front but vague posteriorly; united 

 goilar suture scarcely at all depressed at base. Pronotum two-sevenths 

 longer than wide, about seven-eighths as wide as head, widest at an- 

 terior three-eighths, sides nearly straight in front, feebly arcuate and 

 mcKlerately converging behind; with umbilicate punctures dense but 

 indistinct and frequently united longitudinally. Elytra widest at 

 middle, nan-ovv^ed to both ends; with moderate asperate punctures, 

 moderately dense but not serial. Abdomen moderately and densely 

 somewhat serially muricately punctate. Male, eighth sternite with 

 a small triangular emargination; ninth tergite with a deep narrowly 

 triangular notch between short processes. Female.^ unknown. 

 Length, 3 to 4 mm. 



Type localify. — Guatemala. 



Types. — A series in the British Must-um (one labeled type). 



