MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 119 



dense, intervals convex; with no definite traces of ground sculpture. 

 Length, 3 mm. 



Type locality. — Haiti, Port-au-Prince. 



Types.— VioVA\\^^\ U.S.N.iM. No. 52373, collected by W. A. Hoffman 

 on November 1, 193-4; three paratypes from Barahona, Dominican 

 Kepublic, collected in September 1938 by Dr. P. J. Darlington. 



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



Cuba: Boqiieron, Oriente (Darlington, in M.C.Z.). 



Hispaniola: Haiti, Port-au-Priuoo (Hoffman, inU.S.N.M.) ; Dominican Republic, 

 Baraliona (Darlington, in M.C.Z. and U.S.N.M.). 



Specimens examined. — I have seen only the four types and another 

 example collected by Dr. Darlington. 



Remai'ks. — The type is presumably a male because of the develop- 

 ment of the cephalic and pronotal horns. No abdominal characters 

 were observed to support this assumption. 



The type was taken at night. 



Subfamily Osoriinae 



The elevation of this group to the rank of subfamily was proposed 

 in a previous paper ^ that resulted from this same study. At the 

 same time several genera were transferred from the old tribe Piestini, 

 where they were out of place, and united to form a part of the new sub- 

 family. A very homogeneous group has resulted, but it is one that 

 can be subdivided with ease on the basis of less fundamental characters. 



This subfamily is distinguished by the complete absence of parater- 

 gites on the abdominal segments. While this situation is possibly not 

 entirel}^ unique in the Staphylinidae, it serves readily for recognition 

 of the subfamily, both in the West Indies and elsewhere. 



Thirteen genera are known to occur in the AVest Indies, two of them 

 new. They belong to three tribes and eight subtribes. 



KEY TO WEST INDIAN GENERA OF OSORIINAE 



1. Anlcrior coxa conical, proniincnt, (uul with a transverse sulcus 



on anterior face (Osoriini)— 2 



Anterior coxa usually small, globose, never with a transverse sulcus ^ 



2. Integuments above glabrous; anterior tibiae at most a little expanded 



and with a few moderate spinules 3 



Integuments with sparse pubescence or with tibiae greatly expanded 

 and armed with many large spinules 4 



3. Prosternal process abruptly elevated from presternum ; 



metasternum inipunctate XXIII. Holotrochus 



Prosternal process continuous with prosternum; metasternum generally 

 punctate XXII. Neotrochus 



• Blackwoldcr, 1942, p. 78. 



