March, 1845.] 221 



elytrum with two or three ashy vittce. 3 — 4£ 1. long; 1 — 1£ !. wide. Penn- 

 sylvania. 



Black, densely clothed with a fine, short pile : head finely and densely sha- 

 greened ; clypeus truncate at apex ; labrum narrow, transverse ; palpi fili- 

 form, terminal joint acuts at tip ; antennas inserted before the eyes, nearly half 

 the length of the body, fuscous, pubescent, sometimes the two first joints dull 

 testaceous, joints compressed, basal joint clavate, second small, subglobose, 

 third and fourth almost equal, the former very slightly longer than the latter : 

 thorax convex, comparatively narrower before and wider behind than in cervina, 

 Fabr., dull rosaceous, with a large suboval black spot each side of the middle; 

 medial line obsolete, with a small impression in front of the scutel, which is 

 suborbiculate or cordate, color of the thorax : elytra slightly convex, feebly 

 contracted behind the shoulders; punctate-striate, interstices flat, confluently 

 and minutely transversely corrugated; lateral edges, suture, and two or three 

 longitudinal bands, ashy, they are somewhat obsolete except when viewed in a 

 lateral oblique direction : feet and beneath, dull blackish, ashy sericeous; tarsi 

 almost simple, basal joint subclavate, the three following ones slightly dilated, 

 hardly cordate; claws very minutely ciliated or pectinated. In consequence of 

 the second and third antennal joints of this coleoptera being almost equal, and 

 the tarsal joints simple and not cordate, it cannot strictly be placed in the genus 

 Atopa, but it certainly approaches, in other characters, nearer to it than to any 

 other genus. This species feeds exclusively on the Alder. 



2. A. bicolor. Black, beneath reddish-brown. 3 1. long; 1^1. wide. Penn- 

 sylvania. 



Drilus bicolor, Melsh. MS. 



Black above, or pitchy glossy ; head shining, very minutely punctured ; eyes 

 black ; antennas rufo-testaceous, with the second joint small, subobconic, third 

 and remaining joints subequal ; mouth and palpi testaceous; labrum sub- 

 quadrate, color of the antennas : thorax convex before the middle, widest in the 

 middle, narrowed before, as wide at base as the elytra, with the sides rounded 

 from base to apex ; shining, impunctured, basal and lateral margins finely 

 wrinkled ; basal edge bisinuate, with the hind angles acute : scutel triangular 

 or subcordate: elytra finely and obscurely punctate-striate, interstices broad, 

 subconvex, minutely punctured; sides slightly widest in the middle, thence to 

 the apex obtusely arcuated : beneath pale reddish-brown ; feet testaceous ; 

 tarsi . 



3. A. fusca. Castaneous, beneath and feet testaceous. 2f 1. long; 1 I. 

 wide. Pennsylvania. 



Drilus fuscous, Melsh. MS. 



Chestnut-brown, slightly pubescent; head finely wrinkled, with distant 

 minute punctures, with the front short, very obtusely rounded at apex ; clypeus 

 transverse, distinctly separated from the front, testaceous; labrum quadrate 

 testaceous ; ante.nnaz as in the preceding species, testaceous : thorax short, 

 convex before the middle, depressed towards the lateral and posterior margins ; 

 anterior edge somewhat waved, projecting in the middle over the vertex of the 

 head ; base much wider than the apex, with the sides rounded ; basal edge 



