4" tHE CANADIAN ENTOMOLOGISt. 



equal numbers. Whether development n-as retarded or deranged by 

 indoor raising is uncertain, as I never took even a single specimen by 

 beating, though evidently excessively abundant. The individuals vary 

 from 5 to 9.5 mm. in length. The general color of all bred was ochreous 

 brown, nearly uniform on the thorax and variously interspersed on the 

 elytra with small yellowish spots. My specimens from New Jersey and 

 Florida are entirely cinereous, mottled on the elytra with darker spots, and 

 look as if belonging to a different species. The ^ of this species is dis- 

 tinguished from that of all the others by a very unique and striking 

 character, viz., the pygidium deeply concave, with the cavity sbiooth and 

 surrounded by an acute rim, fimbriated with long silken hairs. The beak 

 of the $ does not equal in length that of either of the two preceding 

 species, but is, in most cases, as long at least as the body ; the posterior 

 margin of the hind femoral tooth is oblique ; the pygidium is very pilose 

 and fimbriate, and the scape of the antennae is short — about equal to the 

 first two joints of the funicle (sometimes shorter and sometimes longer, 

 the relative length of these parts not being a constant). The careful 

 observance of these characters will readily separate it from any of its 

 allies. 



B. nasicus Say. — This species was bred abundantly from the acorns 

 of the white and chestnut oaks, and six examples from those of the scarlet. 

 The first example appeared June ist, and one or two daily till July 6th, 

 between which and the i6th about one hundred and fifty were observed, 

 and scattering ones till the present writing (Oct. ist). Some larvae and 

 pupae are still in the earth. In nature, this species is taken here by 

 beating from about the 10th of May till the last week in July in great- 

 abundance, and individuals occur till near October. The prevailing 

 colour of the vestiture above is ochreous, variegated on the thorax and 

 elytra more or less with brownish markings, many examples, however, are 

 nearly uniform in colour, varying from pale ochreous to dark brown, and 

 I have a specimen from Florida that might be called cinereous. The beak 

 of the % is- about the length of the body in the majority of individuals, 

 and in the remainder either longer or shorter in about equal numbers. 

 The species may be distinguished at a glance from all others except caryx 

 by the larger posterior femoral tooth, the hind border of which meets the 

 femur at a right angle, with no tendency to become sinuate or obtuse. 



B. caryce Horn. — This species has not been taken here, and was not 



