MONOGRAPH OF WEST ENTDIAN STAPHYLINTDAE 211 



for the ridge. Pronotum with punctures indistinct because of fre- 

 quent uniting transversely, giving ahnost a coarsely wrinkled appear- 

 ance; without ground sculpture; scarcely longer than wide, widest 

 near middle, arcuately narrowed in front with angles obsolete, feebly 

 emarginate behind with the angles obtusely rounded. Elytra 

 scarcely longer than broad, nearly one-third wider than pronotum; 

 with humeral callus feeble ; punctures larger than those on pronotum, 

 irregularly shaped, less uniting except at the sides; without ground 

 sculpture. Abdomen not margined; with shallow punctures finer 

 than on elytra and becoming still finer apically; with indistinct 

 ground sculpture. Tarsiis with fourth segment not bilobed ; posterior 

 tarsus long, first segment longer than fifth. Male, all sternites 

 flattened, especially apically, eighth with a narrow excision one-third 

 as wide as apex and twice as long as wide, with apex very narrowly 

 rounded. Female, sternites unmodified. Length, 4 mm. 



Type locality. — ^Trinidad, St. Augustine. 



Types. — HolotyjDe, male, and two paratypes in the Museum of 

 Comparative Zoology; three paratypes in the United States National 

 Museum (No. 52538) ; all collected in April 1929 by Dr. P. J. Dar- 

 lington. 



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



Trinidad: St, Augustine (Darlington, in M.C.Z. and U.S.N.M.). 



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



Remarks. — This species is very distinct by the concavity of the 

 vertex and the nature of the punctation. It is isolated from all other 

 West Indian species by having simple tarsi in conjunction with an 

 unmargined abdomen. 



I have received no record of its habits. 



2. STENUS CHAPINI, new species 



Description. — Shining black. Head rather feebly longitudinally 

 impressed between the eyes; labrum broadly rounded; with very 

 coarse and deep punctures separated by less than half their diameter 

 by narrowly convex intervals, no central smooth space; vertex con- 

 stricted behind ; without ground sculpture. Pronotum very coarsely 

 feebly punctured, separated by less than their diameter, with occa- 

 sional intervals lower so that the punctures are somewhat united 

 irregularly; one-sixteenth longer than wide; widest at middle, 

 scarcely narrowed to apex, moderately narrowed to base; without 

 ground sculpture. Elytra nearly one-half wider than pronotum, 

 one-tenth wider than long; with humeral callus feeble and a slight 

 impression mesad ; punctures as coarse as on pronotum but more fre- 

 quently and distinctly united in irregular rows; with sparse pu- 

 bescence. Abdomen strongly margined throughout; with moder- 



