MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 165 



tinguish them, be reduced to the rank of subgenus. On the other 

 hand, both Holotrochus and Paralispinus are sufficiently distmct 

 generically from Osorlus. 



In this genus I can place definitely only the four species from the 

 West Indies. Of the numerous other species assigned to Holotrochus 

 some will undoubtedly be transferred to Neotrochus. This is indicated 

 by the descriptions of several Central and South American species, 

 but I am unable to make the necessary investigations at this time. 



I have examined 130 specimens belonging to four species, of which 

 one is new. 



KEY TO WEST INDIAN SPECIES OF NEOTROCHUS 



1. ProDotum with minute ground sculpture 4. smithi 



Pronotvun without ground sculpture on disk 2 



2. Elytra sparsely punctate ; coriaceous 1. minor 



Elytra not at all punctate; coriaceous 3 



3. Pronotum distinctly wider than long ; over 3 mm. in length 3. cylindrus 



Pronotum .scarcely at all wider than long ; length 3 mm. or less_ 2. trinitatis 



1. NEOTROCHUS MINOR (Fauvel) 



Holotrochus minor Faxtvel, 1863, p. 437. — Beenhatjee and Schubert, 1911, p. 

 142.— Cameeon, 1913, p. 325.— Leng and Mutchleb, 1914, p. 404. (Not 

 LeConte, 1877.) 



Description.~-V\QQO\\s, to rufopiceous. Head with moderate and 

 very abrupt punctures separated by two to four times their diameter ; 

 without ground sculpture; antennae with segments 7 to 10 trans- 

 verse ; labrum over three times as wide as long, not rounded in front. 

 Pronotum one-fifth wider than long ; sides arcuate, widest at anterior 

 third; with only a trace of depressions at posterior angles; with 

 abrupt rather coarse punctures, separated by one to three times their 

 diameter; without ground sculpture. Elytra scarcely wider than 

 pronotum, only a trifle wider than long; rather coarsely but irregu- 

 larly punctate, punctures separated by one to three times their 

 diameter; slightly coriaceous but without ground sculpture. Meta- 

 stemunb irregularly punctate. Abdomen with very large but very 

 shallow punctures and scaly ground sculpture. Male^ eighth sternite 

 broadly and feebly lobed posteriorly ; ninth sternite narrow, broadly 

 truncate, narrowly separating the lateral plates which are broadly 

 triangular; ninth tergite truncate and bordered with slender setae. 

 Female, eighth sternite strongly lobed posteriorly ; ninth sternite en- 

 tirely absent ; ninth tergite truncate and bordered with slender setae. 

 Length, 2^2 to 3 mm. 



Type locality. — "Colombia (Caracas), Salle; Cuba, D. F. Poey" 

 (= Venezuela and Cuba). 



Types. — Presumably in the collection of Blanche Rancin, Caen, 

 France. 



