THE CANADIAN ENTOMOLOGIST. 29 



bles ; the legs stout, with one claw ; the pro-legs well developed ; the 

 segments gradually tapering from the seventh to the head, the others not 

 varying much in diameter, except the last, which is tapering and terminated 

 with two short black hooks ; the body has a few long stiff hairs. These 

 larvje were taken in the act of excavating galleries similar to the ones in 

 which the pup^e of E. terminatus were found. 



Whether the larvae are carnivorous is unknown, but they are certainly 

 lignivorous, as the work of their burrows shows. The Cleridse are said 

 to be parasitic in the larva state, but this species looks like an exception, 

 as that much misapplied term is scarcely elastic enough to embrace a larva 

 that is at the most only carnivorous. 



Xanthoma villosula Mels. Two forms at least are recognized in this 

 species. The first is the typical, entirely brownish rufous, and usually 

 taken on oak, especially white oak, in June and July ; it is so abundant 

 and well known as to require no further notice. The other is slightly 

 larger, with the thorax a little less convex and more coarsely punctured ; 

 the under sides except the legs are black ; the antennae, mouth parts and 

 feet are always yellowish ; the head, thorax and elytra vary from ferrugin- 

 ous through all degrees of cloudiness to deep black. Like the other form, 

 in life they are densely coated with an amorphous white powder that gives 

 them the appearance of having been dusted with flour, and is so fugitive 

 as to be only imperfectly preserved by the most careful handling possible. 

 This form appears to feed on hazel alone, though it may be taken on any 

 bush in its vicinity. While perhaps not separable from the first form by 

 any constant structural characters, yet for the benefit of collectors it might 

 be well that it should as a color variety have a name. 



When color variations are in any way constant, they are as necessary 

 in a complete cabinet as typical forms, and might be named and cata- 

 logued with great advantage to collectors and no detriment to science. 



Nemognatha nemorensis Hentz. This beetle has a wide range, ex- 

 tending from the Atlantic to Colorado. It is probably not so rare as it 

 seems to be, owing perhaps to the character of its food plant and its 

 apparent resemblance to certain common and undesirable species of 

 Lampyridae, both of which may cause it to be readily overlooked. I find 

 it abundantly throughout July on two species of Rudbeckia growing in 

 meadows bordered with woods (R. speciosa and R. hirta), which rarely 

 yield any Coleoptera except Acmaeodera pulchdla. The insects belong- 

 ing to this genus and the next (Gnathium) are remarkable for having the 



