MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 195 



Remarks. — This species is also very distinct. It is similar only to 

 huhhardi in the structure of the clypeus, but differs from that and 

 other Osorius by the rounded basal angles of the pronotum. 



I find no record of its habits. 



25. OSORIUS LAEVICEPS Notman 



Osorius laeviceps Notman, 1925, p. 7, 15, 25. — Scheerpeltz, 1933, p. 1134. — Dab- 

 LINGTON, 1937, pp. 287, 301. 



Description. — Piceous, elytra frequently rufescent. Head ten- 

 elevenths as Avide as pronotum; eyes relatively prominent; clypeus 

 truncate, angles not prominent; labrum truncate, alutaceous; outer 

 antennal segments about as wide as long; very coarsely and densely 

 punctate except at middle ; without trace of ground sculpture. Pro- 

 notum one-tenth wider than long, strongly narrowed posteriorly, 

 base three-fourths as wide as apex ; sides feebly sinuate ; basal angles 

 rounded; lateral margin not wider posteriorly: with impressed mid- 

 line outlined by serial punctures; with coarse impressed punctures; 

 generally separated by about their diameter ; without trace of ground 

 sculpture. Elytra a little wider than pronotum, one-sixth longer 

 than wide, sides moderately arcuate; with coarse shallow punctures 

 generally separated by about their diameter; slightly coriaceous but 

 not alutaceous. Abdomen with large shallow dense punctures, not 

 alutaceous. Anterior face of front tibia with setigerous punctures 

 in single series. Length, 3I/4 to 3% mm. 



Type locality. — Puerto Rico, San Juan. 



Types. — Holotype in American Museum of Natural History. 



Records- — The following are the records known to me: 



Hispaniola: Dominican Republic, Sanchez (Darlington, in M.C.Z. and U.S.N.M.). 



Puerto Rico: San Juan (Notman, 1925; Darlington, 1937), Adjuntas (Black- 

 welder station 49), Maricao (Blackwelder station 47A), Mayagiiez (Black- 

 welder station .50B, 50C), El Yunque (Darlington, in M.C.Z. and U.S.N.M.) 



Specimens examined. — I have examined the type in the American 

 Museum of Natural History, 28 examples from the Museum of Com- 

 parative Zoology, and 40 collected by me in 1935-37. 



Remarks. — My specimens have not been directly compared with 

 the type but I believe them to be the same. The above description 

 was taken principally from a specimen from Mayagiiez. 



Notman records that the type was taken by sifting. My speci- 

 mens were collected from dung, from rotting cocoa pods, and in 

 quantity from the rotting "fruit" of an imported palmlike tree. 



26. OSORIUS JAMAICENSIS, new species 



Description. — Piceous, pronotum and elytra rufopiceous. Head 

 not distinctly narrower than pronotum; eyes relatively prominent; 

 clypeus truncate, angles not prominent; labrum feebly emarginate 



