102 Mr. D. Sharp on some 



Besides the //. maciiUcollls, Mr. Blackburn has also 

 found the H. eruditus, Westw. ; and as regards this little 

 mite, I may remark that I think it is probably nearly 

 cosmopolitan, and it may be expected to have been de- 

 scribed under various names. I do not consider, however, 

 that it can be the species intended by Fabricius, under 

 the name of Bostrichiis ruficollis (Syst. El. ii. p. 388), as 

 Ferrari has suggested (Berl. Zeit. 1868, p. 255). The 

 little atom can probably live on a great variety of food, 

 and Avill pretty certainly be found to vary a good deal in 

 minor particulars. Cryphalus aspericollis, Woll., from 

 the Canary Islands and Ascension Island, seems to me 

 the same species ; and also Hypothenemus hispidulus, 

 Leconte; and it is also quite probable that Stephanoderes 

 seriatus, Eich., is, as suggested by Leconte, the same 

 thing. 



Mr. Blackburn finds the insect in the bark of a species 

 of acacia on the plains of Oahu. 



CERAMBYCID^. 



Clytarlus ( Sharp, Trans. Ent. Soc. Lond. 1878, p. 20/). <i 



Mr. Blackburn has now discovered two other species of 

 this I'emarkable genus of Longicorns ; the two are striking 

 from the great difference that exists between them. Their 

 divergence from the two species previously described is 

 in opposite directions, and is so great that if these insects 

 are treated in the same manner as the rest of the Cly tides 

 have been by modern authorities, they will have to be 

 considered as two genera, distinct from Clytarlus. In 

 C. rnicrogaster the femora are much incrassate, the incras- 

 sation being nearly gradual from near the base to the apex, 

 with a tendency to an apical knob in addition. The little 

 C. modestus, on the other hand, has the basal half of the 

 femora very slender, while the outer half is abruptly in- 

 crassate. Besides this the hind body is reduced to a mere 

 appendage in C. rnicrogaster (in the male at least, for 

 that is the only sex I have seen), while it is well developed 

 in C. modestus. I find, however, that the two original 

 species, C. rohustus and C cristat^is, by no means agree 

 in the form of the femora ; and the development of the 

 hind body, as I have described in C. robustus, is liable to 

 great difference in the sexes of one species. As there are 

 no doubt other allied species to be discovered in the 



