142 AMERICAN COLEOPTERA. 



49. A. patruele Smith. — Robust, ventricose, black, sparsely, finely pubes- 

 cent. Beak strong, subparallel, dull, finely punctate above, more coarsely at the 

 sides, about as long as the head and prothorax (% ), noticeably longer and very 

 finely punctulate ( 9 )• Antennae inserted rather near the base, first joint barely 

 as long as the next two, second reaching the eye. Front sulcate ; eyes moderately 

 prominent. Prothorax broader than long: apical constriction well marked; sub- 

 parallel in l>asal half; basal margin slightly expanded ; punctuation moderately 

 coarse, not dense ; basal fovea well marked. Elytra less than one-half longer 

 than wide; humeri prominent ; sides straight or feebly arcuate and slightly 

 divergent to just beyond the middle, thence more strongly rounded to apex. Strise 

 deep, intervals twice as wide as the strise, more or less convex. Punctuation 

 beneath somewhat variable, usually rather fine and sparse for this section. The 

 punctures are most closely placed at the sides of the metasternum and on the 

 last ventral, the short veutrals are entirely imininctate, or with at most one or 

 two feeble punctures at the sides. Legs rather slender; claws with a moderately 

 large tooth. Length 1.6-2.3 mm. ; .Oa5-.09 inch. (PI. IV, figs. 11, lift and 17). 



%. Sutural angles rounded; middle and hind tihise with a short, subapically, 

 dentate mucro. 



9 . Sutural angles not rounded ; tibiae unarmed. 



Occurs from the New England States to Florida, and westward to 

 Michigan, Illinois and Texas. 



This species is a common one in the Atlantic Coast region, and 

 shows very little variation, except in size and convexity of elytral 

 intervals. One example from Florida has the legs and antennae 

 rufescent. The only species occurring in the same region with 

 which this is at all likely to be confused is turhulentum, which differs 

 in rostral characters, flatter, narrower intervals and seneous lustre. 



50. A. walstiii Smith. — Elongate, black, pubescence fine but conspicuous. 

 Beak feebly curved, parallel, tip slightly widened, scarcely longer than the pro- 

 thorax( "J, ), as long as the head and prothorax, or at times much longer ( 9 ) ; 

 dilatation weak, two-fifths from the base ( % ), about one-third or one-fourth from 

 the base ( 9 ). finely sculptured and moderately punctate throughout; the tip a 

 little more shining. Front not sulcate and without conspicuous punctuation; 

 eyes moderately prominent. Antennfe somewhat variable, first joint equal to 

 the two or three following, second nearly ( % ), or third ( 9 ) reaching the eye. 

 Prothorax wider than long, though sometimes very slightly so; apex not very 

 much narrower than the base ; sides rounded behind the apical constriction, as 

 wide at or a little behind the middle as at base ; posterior sinuation usually well 

 marked ; punctuation moderate ; basal fovea not conspicuous. Elytra about 

 three-fourths longer than wide, wider behind the middle, sometimes subparallel 

 in the male ; humeri not large ; intervals nearly twice as wide as the stria;, more 

 or less convex. Beneath rather densely pubescent: spar.sely, finely punctate. 

 Length 1.8-2.2 mm. ; .07-.09 inch. (PI. IV, figs. 12, 12a and 18). 



%, . Sutural angles rounded ; middle and hind tibiie with a rather long simple 

 mucro. 



9 . Sutural angles not rounded : tibite unarmed. 



