.440 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM 



Trinidad: Balandi-a Bay (lilackwelder station 97). 



South America: (Koch, 193G; Bornhauer and Schiibort, 1914, as hilhicatiis). 



North America: (i<]richon, 1840; Horn, 1884; Koch, 193G), Florida, Virginia, 



Massachusetts, New Jersey, New Yobk, Rhode Island, Quebec (U.S.N.M. ; 



etc.). 



Specimens examined. — I have seen 7 examples in Dr. Cameron's col- 

 lection, 12 in the United States National Museum, and 96 collected by 

 me during 1935-37. 



Remarks. — This species evidently ranges from the Massachusetts 

 coast to South America by way of the West Indies but has not been 

 recorded from the Gulf of Mexico or from Central America. AVest 

 Indian examples seem to be identical with North American ones. 



This is the only species of Staphylinidae so far recorded from Mona 

 Island. It belongs in the subgenus Euremvs Bierig. The descrip- 

 tion was drawn from a series from Puerto Rico. 



The example in the United States National Museum from Miami, 

 Florida (from Bierig collection, as 7'uffron.'^), differs decidedly from 

 the series herein identified as bistriatus in the extent of the ground 

 scul])ture of the head and pronotum. This specimen is apparently 

 immature, but if it is really the ruffrons of Bierig, then tliat name 

 may represent a valid species. On the basis of the West Indian ex- 

 amples and the original description I believe that tmfifrons is the same 

 as histriatus. 



I have found it under seaweed and drift on sandy beaches. 



LXVI. Genus ERICHSONIUS Fauvel 



BisniuH Tho.mson, 1860, p. 168. (Not Stephens, 1829.) 

 Erichmnius Fauvet,, 1872, p. 427. (Not Schubert, 1911.) 

 Artohius Fauvel, 1876, p. 72. 

 Ncobisnius Ganoi.hauer, 1895, p. 464 (new name for Erichsonius). 



Genotypes. — Staphylinus cinerascens Gra venhorst = Erichsoniu^ 

 cinerascens (Gra venhorst) (designated by Tottenham, 1939). Of 

 Acfohius, StaphyJ'rmis cinerascens Gv'A\QX\\\OY?,t= Actohms cineras- 

 cens (Gra venhorst) (Rules, Article 30, II, /) ; of Neohisnius, Staphy- 

 linus cinera.'fcens Gravenhorst^A^eo^/s/y/M-s cinerascens (Graven- 

 horst) (Rules, Article 30, II, /) . 



Diagnosis. — Head and pronotum without dense umbilicate punc- 

 tures, not margined beneath the eyes; antennae widely separated at 

 the front of head, outer segments densely pubescent from the fourth 

 joint; labrum bilobed; palpi moderately stout, fourth segment of 

 maxillary longer than third, subulate, labial similar to maxillary; 

 gular sutures very ai)proximate posteriorly but not united ; lateral 

 margin of pronotum double, the lines united near the coxal articula- 

 tion; anterior coxal cavities entirely open behind; front coxae large, 

 exserted; posterior coxae contiguous, "triangular''; first and second 



