the genus Griocephalus. 151 



Criocephalus deceptor, sp. n. 



Depressus, fusco-niger, breviter griseo-pubeseens, opacus ; thorace 

 fortiter transverso ; elytris bicostatis fortiter punctatis. Long. 

 20 ram. 



This species is an extremely distinct one, though it 

 looks at first sight very like a moderately-sized individual 

 of G. rusticus. It is however more depressed than that 

 species, and this character removes it from all the other 

 described species.* From C. rustims, G. deceptor differs 

 strongly by the tarsal structure, the third joint being only 

 slightly lobed. The unique specimen is much damaged ; 

 the presternum is not in the least degree protuberant or 

 convex, and the under-surface is remarkably flat. The 

 labrum is of the type of that of C. rusticus. 



Hob. Western Tibet, one specimen in the collection 

 of the British Museum, 



Criocephalus rusticus, Dej. 



Brunneo-ferrugineus, vel fusco-niger, subplanatus, elytris sat dis- 

 crete bicostatis, inter costas perspicue punctatis ; prothorace trans- 

 verso, ad latera fere regulariter rotundato, posterius plus minus 

 angustato. Long. 14-30 mm. 



The male has the basal portion of the antennas, and the 

 legs markedly thicker than the female. 



The synonymy of this species, as distinguished from 

 G. ferns, is very doubtful. Some of that given in the 

 Munich Catalogue is taken from writers who did not dis- 

 tinguish the two forms. The G. rusticus of Dejean's 

 Catalogue and collection is however certainly this species, 

 as is also Mulsant's G. rusticus, and var. B„ 1. c, p. 64, Also 

 G. rusticus, Woll. Cat, Col. Madeira (1857), p. 124 (nee 

 Col. Canar., for which see C. pinetorum). 



The species is readily distinguished by the strongly 

 transverse thorax, which is only one-fifth of the length of 

 the elytra, and by the gular area being very indefinitely 

 limited, rugose in front and feebly punctate behind, and 

 with only a few suberect long hairs, forming a strong 

 contrast to what exists in G. ferns. In finely-developed 



* There is an undescribed (?) species in the collection of the 

 British Museum, coming from the Amanns mountains of Asia Minor, 

 which is also very depressed ; but in other respects this insect is 

 very different from C. deceptor. 



