178 CASEY 



where the first segment appears to be virtually free, the first suture 

 not differing to external view from the others. 



The species are extremely rare in collections but, in greater likeli- 

 hood than actual rarity, perhaps, they may be abundant only at 

 certain very short periods of the year or in relatively few limited local- 

 ities, like Buprestis confiuenta and some others of this family, and as 

 also frequently noted in the Cerambycidae. The genus was conse- 

 quently wholly unknown to me in nature, until Prof. Wickham very 

 kindly lent me the only example that he had secured during many years 

 of skillful collecting. This specimen has served as the type of the 

 diagnosis given in the table of genera on p. 53; it appears to satisfy 

 the general characters of opulenta Fall, which is closely allied to hlon- 

 deli Mars., the true type of Trachykele, and was taken at Nanaimo, 

 Vancouver Island. It is glabrous, very densely and rather finely 

 cribrate and bright green throughout, the elytra with a few small and 

 irregular black spots. These spots are observed under higher power 

 of amplification to be due, not to pubescence, but to actual black- 

 ness of the integument, accompanied by a strong granulato-reticula- 

 tion of the surface, which gives them their velvety appearance. 



