112 BULLETIN 182, UNITED STATES NiATIONAL MUSEUM 



The single example from Trinidad dijffers from all the others in 

 having the gular sutures continued as a definite deeply impressed 

 suture to the base of the labium. As there is a slight degree of varia- 

 tion in this character, and as I have only the one female from Trini- 

 dad, I think it is not worthy of specific segregation. 



I have collected this species from dung and manure, in refuse 

 from a lime press, flying at dusk, and flying to lights. 



XII. Genus BLEDIUS Samouelle 



Bledius Samouelle, 1819, p. 174. 



Subgenus Eesperophilus Stephens, 1829, p. 292. 



Blediodes Mot.sant and Ret, 1879, p. 134. 



Tadunus Schiodte, 1879, p. 147. 



Bargus Schiodte, 1879, p. 148. 

 Subgenus Elbidus Mulsant and Ret, 1879, p. 130. 

 Subgenus Astycops Mulsant and Ret, 1879, p. 195. 

 Subgenus Pucerus Mut.sant and Ret, 1879, p. 212. 

 Subgenus Belidus Mulsant and Ret, 1879, p. 215. 

 Subgenus EuceratoUcdius Znojko, 192.9, p. 203. 

 Subgenus Cotysops Tottenham, 1939, p. 225. 



Genotypes. — Staphylinus armatus V^TVL%v=Oxytelus armatus {Vmi- 

 z&r) = Bledius armatus (Panzer) (original designation). Oi Hesper- 

 ophilus, Staphylinus fracticomis 'P2iy\i\x\\= Bledius fracticornis (Pay- 

 kull) (designated by Westwood, 1838; the designation of arenarius 

 Paykull by Thomson, 1859, is therefore invalid) ; of Blediodes., Staphy- 

 linus fracticornis V2cf&x\S\.— Blediodes fracticornis (Paykull) (desig- 

 nated by Tottenham, 1939) ; of Tadunus., Staphylinus fracticomis 

 ^2iy\ii\\\— Tadunus fracticomis (Paykull) (designated by Tottenham, 

 1939) ; of Bargus., Bledius erraticus Erichson=5(2r^«5 erratlcus 

 (Erichson) (designated here; the designation of fracticomis Paykull 

 by Tottenham, 1939, is invalid since this was not one of the originally 

 included species) ; of Elhidus., Oxytelus hicomis Ahrens^^ Bledius 

 {Elhidus) hicornis (Ahrens) (monobasic) ; of Astycops, Bledius 

 (Astycops) suhterraneus Erichson (designated here; talpa Gyllen- 

 hal, designated by Thomson, 1859, is considered a synonym) ; of 

 Pucerus, Bledius {Pucems) verres Erichson (monobasic) ; of Belidus, 

 Bledius (Belidus) a7igustus Muhnnt and "Rey (monobasic) ; oiEucera- 

 tohledius., Bledius {Euceratohledius) fwcatus (Olivier) (original 

 designation) ; of Cotysops., Staphylinus arenarius Vay^wW — Bledius 

 {Cotysops) arenarius (Paykull) (original designation). 



Diagnosis. — Body more or less cylindrical ; without ocelli ; clypeus 

 separated from vertex by a suture; labrum transverse; antennae 

 strongly geniculate, 11-segmented; gular sutures united in front; sub- 

 mentum transverse ; maxillary palpi subulate ; prosternum prolonged 

 beneath coxae, separating the cavities but not the coxae ; coxal cavities 



