156 Mr. D. Sharp on 



the female to be G. rusticus. The female differs from the 

 male by its large size, black colour, and the usual differ- 

 ences in the length of the antennas and the structure of 

 the apex of the abdomen. 



" Abounds in the Ancient Pinals of intermediate and 

 lofty elevations " (Woll. 1865), but nevertheless is exces- 

 sively rare in collections. Recorded from the islands of 

 Palma, Teneriffe, and Hierro. 



The male is small (sometimes only 10 or 11 mm. long) 

 and of a brown colour, the gular area is very definitely 

 limited behind, almost semicircular, and is closely and 

 coarsely punctured, the bush of erect pubescence moderately 

 dense. 



The female has not been described. I have seen only 

 two specimens of it, one in my own collection and one in 

 Wollaston's Canarian collection, where it stands as G. 

 rusticus. It is more flat than the corresponding sex of G. 

 ferus, and has a more transverse thorax. The punctuation 

 of the gular area is remarkably definite, and extends over 

 a large space ; the prosternum is but little convex in front, 

 and the metathoracic episternum is much narrower. In 

 these latter respects, as well as in the more deeply divided 

 third tarsal joints, it approaches 0. rusticus. 



Criocephalus ferus, Mulsant. 



Transversim convexus ; mas fu^co-niger, femina nigricans ; opacus, 

 elytris bicostatis, inter costas tantum subtilissime punctatus. Long. 

 10-30 mm. 



The male is usually shorter and paler in colour than the 

 female and the prosternum is much less convex. This 

 species is rare in collections, and owing to this and to the 

 want of knowledge as to the sex-differences are due its 

 confusion with G. rusticus by entomologists. The two 

 forms are really profoundly different. The structure of the 

 labrum distinguishes the two absolutely, but there are 

 numerous other characters. In the male of C. ferus the 

 basal portion of the antennas is but little thicker than in 

 the female. In the female the front of the prosternum 

 is more convex, and the metathoracic episterna considerably 

 broader than in G. rusticus. The under-surface is altogether 

 more closely and finely punctate and pubescent and there- 

 fore less shining. The scutellum in G. ferus is never in 

 the least depressed along ths middle; and the sculpture 



