Entomological Society. 497 



forwarded by Captain Boyes, the interior of which was found to con- 

 tain a mass of dried dung, partially eaten, and a dead larva. 



Mr. A. White exhibited drawings of various remarkable species of 

 Crustacea, and read the description of a new genus of Brachyura 

 somewhat allied in appearance to Plagusia of Latreille. 



" The two divisions of Plagusia and Grapsus were formed by La- 

 treille and Lamarck for the reception of certain Crabs, to which, from 

 their square carapace and frequently perpendicular sides, Latreille 

 gave the name of Quadrilateres. By De Haan the former of these 

 genera has been divided into two, his Philyra depressa being founded 

 on the Cancer depressus figured by Herbst, while he retains the name 

 of Plagusia for those species of which the Cancer squamosus of Herbst 

 (i. 260. t. 20. f. 113) is the type : of this last group he is acquainted 

 with four species, two of which he describes. Professor Edwards 

 only sectionally divides the genus Plagusia, and describes a new spe- 

 cies from the Cape under the name of PL tomentosa. A careful 

 perusal and comparison of the description given by Linnaeus of his 

 Cancer Chabrus (M. L. U. Reg. 438) has made me consider the 

 Plagusia tomentosa synonymous with the Linnaean species ; in which 

 case P. Chabrus must stand in the list for P. tomentosa. Were there 

 any just ground for separating the Plagusice depressa and tomentosa, 

 the name Philyra, De Haan, ought to be changed, because already 

 used for one of the genera of the Leucosiadous family of Crustacea. 

 " Without referring to the divisions of the marked group called 

 Grapsus, I may here exhibit a sketch of a most remarkably formed 

 genus from one of the Government voyages, somewhat allied to Pla- 

 gusia, but differing much from it in appearance and even in family. 

 '• Telmessus, White. Carapace depressed, somewhat pentagonal, the 

 latero-anterior sides being the longest ; the latere -posterior sides 

 have two teeth in the middle, the latero-anterior sides have two 

 broad dentated teeth between the external angle of orbit and the 

 strongly developed, wide dentated division, the end of which forms 

 one of the prominent angles of the carapace ; the beak is very wide, 

 and is formed of three broad teeth, the lateral forming the internal 

 angle of orbit ; the central is the widest, and by three notches at 

 the end is divided into four small teeth ; the inner antennie are 

 small, and not contained within a groove of front ; the outer an- 

 tenncB are very large, two basal joints thick and strong, and 

 project beyond notch of front. The external pedipalps have the 

 3rd joint pointed at the end ; it is oblong-ovate. Legs very long, 

 compressed ; tarsi longer than the joint before them, somewhat 

 compressed. 

 " Telmessus serratus. Surface covered with small warts arranged in 

 some places in lines, with hairs proceeding from the front of them. 

 " The specimen is a male." 



The following papers were also read : — 



•' Description of a new genus of Lamellicorn Beetles apparently 

 belonging to the family Aphodiidec, from India.'* By J. O. West- 

 wood, F.L.S. 



Ch^toi'isthes, Westw. Corpus oblongum, glabrum, dorso valde 



