86 COLEOPTERA. 



appears to vary considerably in colour. In size and build 

 it is not unlike B. looigulus (which I have indeed seen con- 

 founded with B. opacns)j but its duller thorax and want of 

 a dorsal channel will at once serve to distinguish it from 

 that species, in which moreover the posterior angles of the 

 thorax are more obtuse, though not in so decided a degree 

 as in B. opacus. 



47*. Bagous nodulosus, Schon. 

 This species cannot be regarded as British, since I find 

 that the specimen taken by myself, upon the authority of 

 which I was induced to record it as such, is a very large, 

 somewhat elongate, and much abraded example of B. 

 lutulentus. I was in a great measure led into this error by 

 the specimens representing the latter in the British Museum 

 Collection (on which I, at that time, relied) ; these are very 

 few in number, small in size, in bad condition, and asso- 

 ciated with B. petrosus, so that I do not now wonder at my 

 inability to make my insect agree with B. lutulentus, as there 

 represented ; and, as it certainly would not correspond with 

 any other British member of the genus, I was erroneously 

 led to refer it to B. nodulosus, which, from description, it 

 seemed to resemble in size and structure. 



E. C. Rye. 



November, 1863. 



