586 Mr. T. Vernon Wollaston on the 



Hexartlirum (for the culinaris, Germ., and the submuri- 

 catuSy Bohm. ), and Brachytemnus (for the porcatus, Mull. ), 

 there still remains a residuum, even amongst its smaller 

 members, which future monographers will in all pro- 

 bability further divide ; yet, having reduced its hetero- 

 geneous material thus far, and since I am not professedly 

 in this paper examining every described species (some of 

 which would not be readily accessible), I am content to 

 leave the group partially pruned, and to treat it as repre- 

 sented by those particular exponents which I have been 

 able to inspect, and a list of which will be found in my 

 general summary at the close of the present memoir. As 

 thus curtailed, therefore, I believe that Rhyncolus will be 

 found to possess by no means so universal a range as the 

 different Catalogues would lead us to conclude, none of 

 its members being, apparently, of a large stature. At the 

 same time, however, I would not wish to imply that its 

 area of distribution is unnecessarily restricted ; but merely 

 to call attention to the fact that a vast proportion of the 

 species which figure as Rhyncoli in various papers and 

 local enumerations have in reality nothing in common 

 with the universally-acknowledged generic type. 



For the characters which separate this genus from 

 Phlceophagus, with which it has occasionally been con- 

 founded, the observations which I have given under the 

 latter will suffice. 



113. CAULOPHILTJS (Wollaston, Ins. Mad. 315. 1854). 

 The insect on which this genus was established in 1854, 

 and which I captured twenty-six years ago in the island 

 of Madeira, is still unique ; and in its general appearance 

 it somewhat resembles at first sight a small state of the 

 European Rhyncolus cylindrirostris, Oliv. (= lignarius, 

 Mshm.). Nevertheless when closely inspected it will be seen 

 to be structurally dissimilar in many respects ; and I doubt 

 indeed if it can be actually associated with the Rhyncoli at 

 all. Thus, in addition to its rostrum being obsoletely 

 divided from the head by a very obscure frontal line, or 

 depression, its antennae are by no means on the true 

 Rhyncolus pattern, their club being considerably larger 

 and thicker, but nevertheless more acute at the apex, 

 their funiculus less incrassated (the basal joint being very 

 conspicuously smaller, and the terminal ones narrower 

 and more transverse), and their scape more clavate. Its 

 eyes also are very much more developed, as well as 



