38 COLEOPTEEA COLLECTED IN CANADA. 



the antecedent ones ; head short, eyes black ; thorax granulate, of 

 same width as elytra — the sides depressed, rounded posteriorly, with 

 two anterior obtuse augles, and finely serrated beneath — disc elevated, 

 on which are several tubercles ; scutellum black, elevated ; elytra 

 with three ridges longitudinally arranged — tbe two anterior form a 

 series of tubercles, and the exterior reaches from base to apex, where 

 there are two large tubercles on each elytrum — margin of a darker 

 color, and densely serrated beneath. Length 4 liues. Toronto, rare. 

 In some characters it agrees with Kirby's specimen. The rare 

 occurrence of the species in this neighborhood prevent a determina- 

 tion of the sexes at present. Their attachment to Boleti and other 

 vegetable excrescences confine them to old forests. 

 OPLOCEPHALA— Neomida 



BICORNIS. Oliv. Ent. 3, 55. Kirb. N. Z. 235 (Arrbeuoplitis). viresoens Lap. 23, 341. 

 Hispa E- Mant. p. 215. 



5 Antennae black, the three first joints attenuated and rufous ; 

 clypeus armed with a pair of minute teeth ; head dark green, glossy, 

 armed behind the eyes with a pair of cylindrical vertical horns, which 

 are rufous at the apex ; thorax rounded at the sides and minutely 

 punctured; scutellum triangular ; elytra dark green, glossy, slightly 

 furrowed and punctured in the furrows ; beneath black, glossy, and 

 punctured ; legs rufous. Length 2 lines. 



2 same color as 5 ; the head is transversely impressed between the 

 eyes, and unarmed. 



Ths species is one of the most common of our fungivora : in sum- 

 mer they devour fungi and other excrescences on decayed trees, and in 

 winter they hybernate and are found congregated in large numbers 

 under the bark. 



STATYBA. ARTHROMACKA 



AENEA Say, Long's Exp. 2, 2S7. doaacioides Kirb. N. Z„ 237. 



Antenna? longer than the head and thorax, tawny-yellow, black 

 at base — 1.1-articulate : 3d to 10th of equal length, downy and ring- 

 ed with black— apical articulation longest ; above black- bronzed, 

 glossy, with a slight tint of green — thickly and irregularly punc- 

 tured ; thorax cylindrical ; elytra wider than thorax, rounded poste- 

 riorly ; body beneath glossy, breast densely punctured ; femora? cla- 

 vate ; joints of tarsi tawny-yellow. Length 5 lines. Toronto, on 

 young oak trees. Bare. 



One distinctive character by which this insect may be determined 

 is, that the tarsi are conspicuously dilated, and, behind the cysts tbe 

 joint supporting the ungues is surrounded by a transparent ring at 

 the base. At " first sight," its resemblance to a Donacia, as Mr. 

 Kirby states, is merely from color ; that alone probably led him io 



