AMERICAN PHILOSOPHICAL SOCIETY. 567 



them has four only as stated in the description. Belongs to Fam. 

 1st. 



13. S. ATER Grav.— In my cabinet I find that I formerly 

 placed this species under the genus Astra^jseus Grav., from the 

 circumstance that the terminal joints of the palpi are more dilated 

 than in any other species of Staphylinus, that I am acquainted 

 with. The terminal joint of the maxillary palpi, is not longer 

 than the penultimate one, and the diameter is nearly, if not quite 

 as great ; the terminal joint of the labial palpi is very obviously, 

 dilated, oval, and its transverse diameter is nearly double that of 

 the last joint of the maxillaries. Still, however, as neither of 

 these joints can be called securiform, agreeably to the essential 

 characters of Astrapasus, we must agree with Glravenhorst, and 

 return the species to his third family of Staphi/Umis, from which 

 it certainly differs in the characters above stated. 



[Belongs to Ocypus. — Lec] 



XANTHOLINUS Dahl. 



1. X. emmesus Grav., Coleopt. Micropt. 176, belongs to this 

 genus. It is subject to vary in its coloring; the abdomen is often 

 piceous, and sometimes even still paler. 



2. X. cephalus. — Black ; antennse reddish-brown ; elytra and 

 feet honey-yellow. 



Inhabits Virginia. 



Body black, polished ; head elongated, sides parallel, punctured ; 

 punctures numerous and larger each side, excepting immediately 

 the line behind the eye obsolete on the longitudinal middle ; a 

 larger puncture each side at base ; and a slight longitudinal in- 

 dentation on the basal margin ; thorax as wide as the head ante- 

 riorly, becoming gradually a little narrower to the base ; a dorsal 

 series of five or six punctures; lateral four or five punctures; on 

 the anterior termination of this series a much dilated slight inden- 

 tation ; marginal puncture one ; basal edge each side and lateral 

 edge with a series of punctures ; elytra honey-yellow, irregularly 

 not profoundly punctured; pectus rufous; feet honey-yellow j 

 abdomen piceous black. 



Length one-fourth of an inch. 

 1834.] 



