NORTH AMERICAN COLEOPTERA. 49 



A. |>ar<lalis Lee. — ModcM-ately elongate and convex, parallel, piceous, shin- 

 inj;; head in great part, sides of thoi-ax, legs and elytra yellow, the latter macu- 

 late with black spots. Antennre testaceous, club fuscous. Head convex, very 

 jilainly trituberculate % , or feeblj^ so 9 . surface coarsely and densely punctured 

 9 or more coarsely and less densely % ; front hemi-hexagonal, the clypeus very 

 feebly emarginate with rounded angles, the geniB feebly prominent and obtuse. 

 Thorax nearly twice as wide as long and not narrower in front % , or less wide 

 and slightly narrowed in front 9 , the sides strongly arcuate %, or feebly arcu- 

 ate 9 ' tliti hind angles distinct, but obtuse ; the base broadly arcuate, basal mar- 

 ginal line distiuct, disc convex, sparsely finely punctured, the punctures a little 

 coarser toward the side, more evident in the 9 ! color piceous, the sides rather 

 broadly yellow. Elj^ra narrower than thorax % or wider 9 , moderately deeply 

 striate, strife crenately punctured, intervals .slightly convex and sparsely punctu- 

 late, the punctures very distinct 9 • or scarcely so % ; color pale yellow with 

 piceous spots arranged in a design as follows : a small spot at base of fifth interval, 

 others on the intervals 3-4-5 forming a semi-circle, the intervals 7-8 with a broad 

 stripe extending from the humeral umbone three-fourths to apex, and with other 

 spots between the end of this stripe and the suture. Body beneath sparsely, 

 indistinctly punctate. Mesosternum opaque and alutaceous at sides with an oval 

 smoother space at middle, not carinate between the coxse. Anterior tibite smooth 

 in front, tridentate externally, obsoletely crenate above, the first tarsal joint 

 shorter than the second. Posterior femora alutaceous, sparsely punctate, the fii-st 

 tai-sal joint nearly as long as the next three. Length .22 inch ; 5.5 mm. 



il/rt?e.— Head almost entirely yellow, merely the occiput and a median oval 

 space piceous, the front distinctly tnberculate, the median tubercle quite promi- 

 nent. Spur of anterior tibia rather stout, feebly curved. Upper spur of middle 

 tibia truncate, its inner angle prolonged inward. 



Female. — Head piceous, the lateral and apical margins paler, front barely per- 

 ceptibly tuberculate. Spur of anterior tibia more slender, the upper spur of 

 middle tibia acute. 



The elytra! markiugs in this species are far less variable than in 

 inqidnatus, and form a very diflerent design. This is one of the 

 species which makes it nnadvisable to use the frontal tubercles as a 

 means of separating groups as the female is almost entirely devoid 

 of them. 



Occurs on the Pacific coast from San Francisco to Vanccjuver. 

 I have seen one in the cabinet of the late Mr. Wilt marked Filniore, 

 Nebraska. 



A. leopardllS Horn.— Oblong, slightly broader posteriorly, dark brownish, 

 entire mai-gin of head and sides of thorax paler, elytra dark reddish yellow, 

 indistinctly maculate, legs rufo-te.staceous. Antennre pale. Head moderately 

 convex, front indistinctly tuberculate, surface coarsely sparsely punctured. Cly- 

 peus hemihexagonal, feebly emarginate in front, the angles rounded, genre mod- 

 erately prominent, but obtuse. Thorax nearly twice as wide as long, slightly 

 narrowed in front, the sides feebly arcuate, hind angles distinct, but obtuse ; base 

 arcuate with fine marginal line, di.sc convex, coarsely rather sparsely ininctate 

 over the entire surface with finer punctures intermixed. Elytra as wide at base 



TRANS. AMEK. ENT. SOC. XIV. (7) .MARCH, 1887. 



