MONOGRAPH OF WEST IXDIAN STAPHYLINIDAE 199 



30. OSORIUS TRINITATIS, new species 



Description. — Castaneous, head, disk of pronotum, and apical third 

 of elytra picescent. Head scarcely narrower than pronotum; eyes a 

 little prominent; clypeus evenly but only moderately deeply emargi- 

 nate, the angles somewhat prominent but not at all tuberculate; 

 labrum truncate, slightly emarginate above the declivity, with traces 

 of ground sculpture throughout; outer segments of antennae much 

 wider than long; with rather indefinite coarse shallow punctures 

 obscured by very indefinite ground sculpture. Pronotum one-six- 

 teenth wider than long, moderately narrowed to base with the sides 

 nearly even and only slightly arcuate; apex about one-third wider 

 than base; the hind angles broadly rounded; margin not distinctly 

 wider basally; disk with median impunctate stripe irregularly out- 

 lined, elevated only near base ; with moderate and round but irregu- 

 lar and very shallow punctures, not coalescing but somewhat 

 obscured by traces of ground sculpture. Elytra one-sixteenth wider 

 than pronotum, one-tenth longer than wide, widest at apical fourth, 

 sides feebly arcuate; surface very uneven, without distinct punc- 

 tures but with indistinct tubercles throughout, with traces of minute 

 ground sculpture on the coriaceous surface. Abdomen with distinct 

 moderate punctures separated by about twice their diameter and 

 somewhat obscured by the indistinct ground sculpture. Anterior 

 face of front tibia with a regular series of setigerous punctures 

 placed a little laterally. Length, 3 mm. 



Type locality. — Trinidad, 10 miles north of Arima, elevation 1,800 

 feet. 



Types. — Holotype, in Museum of Comparative Zoology, and one 

 paratype. United States National Museum (No. 52501), collected 

 on IMarch 28, 1935, by Dr. N. A. Weber. 



Records. — The following is the only record known to me: 



Trinidad: Arima (Weber, in M.C.Z. and U.S.N.M.). 



Specimens examined. — I have seen only the two types. 



Remarks. — This species differs from iveberi very greatly in the 

 sculpture of the head, as well as in size and the shape of the antennal 

 segments. 



I have received no record of its habits. 



31. OSORIUS EXIGUUS Notman 



Osorius exiguus Notman, 1925, pp. 7, 16, 25. — Scheerpeltz, 1933, p. 1133. — Dar- 

 lington, 1937, pp. 287, 300. 

 Osorius micros Notman, 1925, pp. 7, 22, 25.— Darli ngton, 1937, pp. 287, 301. 

 (Not Sharp, 1887.) 



Description. — Rufopiceous to rufotestaceous. Head nine-tenths as 

 wide as pronotum; eyes scarcely at all prominent; clypeus truncate, 



