MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 299 



slightly uneven; without ground sculpture. Elytra sparsely, finely, 

 and irregularly submuricately punctate, surface between smooth and 

 flat; without ground sculpture. Abdomen finely, sparsely, and 

 minutely submuricately punctate; without ground sculpture. Male^ 

 vertex between the eyes with a circular depression divided by a 

 longitudinal carina which ends posteriorly in a smooth excrescence 

 and which bears several long haii*s; eighth sternite feebly broadly 

 emarginate. Female^ unknown. Length, 2i/2 mm. 



Tyye locality. — Dominica, one-fourth mile north of the Boery 

 River on coastal plain. 



Types. — Holotype, male, U.S.N.M. No. 52407, collected by me on 

 June 26, 1936. 



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



Dominica: (Blackwelder station 252). 



Specimens examined. — I have seen only the unique type. 



Re7neirh8. — Like personata this is distinguished by its carinate 

 head but differs from it in having the carina distant from the neck, 

 between the eyes. 



The type was caught flying at dusk. 



XL. Genus RUGILUS Samouelle 



Rugilus Samouelle, 1819, p. 173. 



Stilirus Lepeletieb and Skrvule, 1825, p. 495. 



Stilicosoma CASKr, 1905, p. 219. 



Genotypes. — Paederus orhiculatus YiihviQ,mii=^ Rugilus orbiculatus 

 (Fabricius) (original designation; also designated by Curtis, 1828). 

 Of Stilicvji, Paederus orhicidatu-s FahYic'n\s=Stilicus orbiculatus 

 (Fabricius) (designated by Thomson, 1861) ; of /Stilicosoma, Stili- 

 GU8 rufipes Germar^ Stilicosoma ruflpcs (Germar) (monobasic). 



Diagnosis. — Head not emarginate posteriorly, with dense umbilicate 

 punctures but without ground sculpture ; antennae posteriorly flexile, 

 not strongly geniculate, basal segment not much elongate, first and 

 second not large with rest small; labrum large and broad, not much 

 emarginate, bidenticulate at middle, with outer angles more or less 

 toothed; fourth segment of maxillary palpus subulate; gular sutures 

 united ; neck less than one-fifth as wide as head ; pronotum strongly 

 narrowed in front but not prolonged; prosternum carinate between 

 coxae but not much dilated under them; anterior coxae large, ex- 

 serted; middle coxal cavities confluent; posterior coxae contiguous, 

 "conical"; first and second abdominal sternites absent; seventh ster- 

 nite sometimes and eighth always emarginate in male; apex of 

 posterior tibia with a ctenidium only on inner sides. 



Remarl-s.—ln Casey's key to the Paederini the statement that this 

 and related ffenera l\ave the prosternum "greatly dilated laterally 



