MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 153 



marginal ridge to the anterior angle, in the number of fine costulae 

 on the disk of the pronotum and posterior part of the head, in the 

 distinctness of the obsolete costa of elytra between the first and second, 

 and in other characters. 



I have taken this species flying at dusk, under bark of rotting logs, 

 and under chips on stumps of the breadfruit tree. 



5. THORACOPHORUS EXILIS (Erichson) 



Glyptoma ectile Ekichson, 1S40, p. 910.— Lacordaike, 1854, p. 149. — Fattvel, 1865, 



pp. 63, 65. 

 Thoracophorus exilis (Ericlisou) Motschulsky, 1859, p. 67. — Beknhauer and 



Schubert, 1910, p. 26.— BEmNHAUER, 1921b, p. 170. 



Description. — Rufofermgineous, opaque. Head as wide as pro- 

 notum ; sides acutely margined ; with two longitudinal elevated lines. 

 Pronotum nearly as wide as elytra, anterior angles right, not at all 

 prominent; sides straight in front, posteriorly moderately suddenly 

 sinuately narrowed ; subdepressed, moderately uneven ; with five feebly 

 elevated longitudinal ridges, the external pair submarginal. Elytra 

 one-half longer than pronotum ; with four longitudinal costae, inter- 

 stices smooth. Length, 1^2 w^n^- (From Erichson.) 



Type locality. — St. Thomas. 



Types. — Either in the Hope Museum, Oxford, or the Zoologische 

 Museum, Berlin. 



Records. — The following are the records known to me: 



St. Thomas: (Erichson, 1840; Lacordaire, 1854; Fauvel, 1865). 

 [South America: Brazil (Bernhauer and Schubert, 1910).] 



Specvmens examined. — I have seen no specimens that I can associate 

 with this name and description. 



Remarks. — This species should be amply distinct by the presence of 

 the fifth elevated line on the pronotum, although this might be an error 

 in description for the situation that is found in T. simplex. At present 

 it must be retained in our lists as a species not recognized since the 

 original description. 



I assume that the locality "Brasilien" cited by Bernhauer and Schu- 

 bert is an error, as they do not cite the type locality and I find no 

 other record of South America. Erichson's original citation was: 

 "Habitat in Americae merid. ins. St. Thomae, Dom. Moritz." 



Erichson makes no specific mention of habits, but records this genus 

 from under bark. 



6. THORACOPHORUS DUBITANS, new species 



Description. — Piceoferrugineous. Head very deeply grooved and 

 strongly ridged; side margins strongly elevated from the acute pos- 

 terior angles to the antennal fossae, the front margin rather finely 

 carinate; with a large rounded prominence over the antennal fossa 



449008—42 11 



