iiU7.] 125 



than that of the thorax, g-round-sculpture coriaceous, pubescence scanty. 

 There appear to be no secondary sexual characters. 



Hah. Sandy beaches in vicinity of Pox't Stanley, Falkland Islands, 

 in decaying kelp {Macrocystis pyrifera'), December 191-i. 



Aijril 281/1, 1917. 



DESCEIPTION OF A NEW GENUS OF STAPHYLINIDAE. 

 BY MALCOLM CAMEROX, M.B., R.>., F.E.S. 



In 1875 C. O. Waterhouse (Ent. Monthly Mag. xii, p. 54) 

 described as Phytos7(s atriceps a species from Kerguelen Island, the 

 type of which is in the British Museum. In December 1914, at Port 

 Sfcxnley, Falkland Islands, I found this species occurring on sandy 

 beaches in the dry root-masses of the "kelp" (Ifacrocystis pyrifera) 

 thi'own up by the sea. Examination of these specimens shows that the 

 insect must be removed from Pliytosus, and the following new genus is 

 founded on it. 



Paeaphytosus, n. gen. 



Facies of Phytosus. Labrum transverse, gently rounded at the sides 

 Mandibles lightly curved, the right one furnished with a small tooth at the 

 middle of the inner border. Inner lobe of maxilla in front furnished with 

 spines internally, posteriorly ciliated ; outer lobe with the apex ciliated. 

 Maxillary palpi 4-joiuted, the first joint very small, second elongate, slightly 

 curved, the third a little longer than the second, the fourth subuliform, about 

 one-third of the length of the preceding. Mentum transverse, quadrilateral ; 

 anterior margin broadly emarginate, narrower than the posterior. Labium 

 ti'ansverse ; tongue narrow, elongate, simple. Labial palpi elongate, two- 

 jointed, the second joint about half the length of the first. I'araglossae not 

 extending beyond the tongue, ciliate internally. Tibiae ciliate externally, 

 not spiny. Tarsal formula, 4,4,5; the anterior and middle pairs with the 

 first three joints subequal, together a little shorter than the fourth ; the posterior 

 with the first four joints subequal, the fifth about as long as the three preceding 

 together. Claws simple. Apterous. 



This genus appears to stand near Fhytosus and Arena : from the 

 first it differs by the two-jointed labial palpi and the absence of spines 

 on the tibiae ; from the second by the two-jointed labial palpi and the 

 toothed right mandible. 



April 29th, 1917. 



