MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 223 



area behind middle of disk; without ground sculpture; pubescence 

 very short. Elytra two-thirds wider than pronotum, one-fourteenth 

 wider than long; humeral callus rather prominent; punctured simi- 

 larly to pronotum but more coarsely and a little more sparsely and 

 regularly ; the intervals unevenly convex ; without ground sculpture ; 

 pubescence distinct. Abdomen not margined; punctures smaller than 

 on pronotum, a little shallower, intervals flat ; without distinct ground 

 sculpture ; pubescence distinct. Tarsus with fourth segment bilobed. 

 Male^ seventh and eighth sternites with denser and finer pubescence, 

 eighth with a broad semicircular emargination ; ninth flattened trans- 

 versely but somewhat concave longitudinally, narrowed posteriorly 

 with a small arcuate emargination between the two spinif orm apices ; 

 seventh, eighth, and ninth sternites with very indefinite ground sculp- 

 ture. Female^ apical segments without special modifications, sculp- 

 ture as in male. Length, 4I/2 to 5 mm. 



Type locality. — Trinidad, St. Augustine. 



Types. — Holotype, male, and three paratypes in the Museum of 

 Comparative Zoology ; three paratypes in the United States National 

 Museum (No. 52424) ; collected in April 1929 by Dr. P. J. Darlington. 



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 seven types. 



Remarks. — This species is distinguished by the size and length of 

 the median smooth area of the head, as well as by the spiniform apices 

 of the ninth sternite of the male. 



I have received no record of its habits. 



17. STENUS LUCENS Cameron 



Stentts (Meftostenns) luccns Cameron, 1913b, p. 329.— Leng and Mutchler, 1917, 

 p. 198.— ScHEERPELTZ, 1933, p. 1192. (Not Benick, 1917.) 



Description. — Black. Head with eyes broader than elytra ; with 

 rather broad, raised, almost impunctate central space, rest of surface 

 with moderately large not very close punctures; central space and 

 interstices smooth and polished without trace of ground sculpture; 

 glabrous; antennae long and slender. Pronotum widest at middle, 

 scarcely longer than wide, equally narrowed in front and behind, 

 impressed on either side at the widest part ; punctures much finer and 

 more sparing than on the head, interstices smooth and polished; 

 glabrous. Elytra shorter than pronotum, transverse; with distinct 

 humeral callus and impression internal to latter; disk impressed; 

 punctures fine and scattered as on pronotum, interstices smooth, 

 polished; glabrous. Abdomen margined, gradually narrowed to apex, 

 with a few scattered punctures at base of segments, rest of surface 

 almost impunctate; pubescence scanty. Tarsus with fourth segment 



