MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 441 



abdominal sternites absent; intersegmental membranes of abdomen 

 with a pattern of irregular rounded sclerotized areas arranged in 

 longitudinal bands ; femora unarmed. 



Remarks. — The name Xeohisnius was proposed by Ganglbauer ap- 

 parently under tlie impression that Erichsonius was preoccupied. 

 However, the two previous uses (Dana, 1849, and Westwood, 1849) 

 both use the spelling Erichsonia., which does not preoccupy Erich- 

 sonius under our present code of nomenclatural procedure. It there- 

 fore becomes necessary to restore Erichsonius as the valid name of 

 this genus. 



Seven species of this genus have been described from the West 

 Indies, and I have made every effort to recognize them. I have seen, 

 type material of five of these species and have material in con- 

 siderable series from Cuba to Grenada. These I am unable to separate 

 into more than one species. This one may very likely be found on 

 some part of the mainland of America as well, but I have not been 

 able to recognize it among the species available to me. 



1. ERICHSONIUS HUMILIS (Erichson) 



Philonthus hnmilis Erichson, 1840, p. 512. — Cheveolat and Fauvel, 1863, p. 



435.— Leng and Mxjtchlee, 1914, p. 406.— Wolcott, 1924, p. 78 ; 1936, p. 197. 

 Neobisnius hnmilis (Erichson) Bernhaueb and Schitbebt, 1914, p. 323. — Leng 



and MuTCHLEE, 1914, p. 406.— Bierig, 1933, pp. 50, 54. 

 NcoMsnitts margipaUens Bernhauer and Schubert, 1914, p. 323. (Not Lath- 



rohiuin margipaUens Duval, 1857, p. 41.) 

 NeoUsnius limiatus Cameron, 1922, p. 118. — Scheerpeltz, 1933, p. 1327. 

 Neobisnius funerulus Cameron, 1922, p. 119. — Scheerpeltz, 1933, p. 1327. 

 Neobisnius nigrocoeruleus Cameron, 1922, p. 118. 

 Neobisnius nigrocaeruleus Scheerpeltz, 1933, p. 1327 (misspelling). 

 Neobisnius carbonarius Bierig, 1933, p. 49. 

 Neobisnius demmeli Bierig, 1933, p. 54. 



Description. — Piceous, the pronotum sometimes rufescent, narrow 

 apex of elytra and abdominal segments generally pale. Head sub- 

 quadrate with angles broadly rounded, seldom visibly narrowed be- 

 hind eyes ; eyes separated from base by a little more than their length ; 

 with moderate punctures of even size, generally separated by less than 

 their diameter but rather indistinct posteriorly; sometimes with very 

 indistinct ground sculpture. Pronotum over one-fifth longer than 

 wide, widest in anterior fourth and thence emarginately narrowed to 

 rounded base; smooth midline narrow, not outlined by punctures in 

 series ; punctures similar to those on head but generally denser, with- 

 out large smooth areas but punctures indistinct at sides; sometimes 

 with very indistinct ground sculpture. Elytra with fine and rather 

 dense submuricate punctures, not distinct if viewed from behind. 

 Abdomen very finely and moderately densely submuricately punctate, 

 with indistinct ground sculpture. Male^ eighth sternite with a small 



449008 — 42 29 



