NORTH AMERICAN COLEOPTERA. 22.') 



Elytra uniform in eolor and more elongate jocosiiN. 



Elytra very densely puiu-late, apical pale border much wider externally. 



Jiiciiiidus. 



Abdomen very sparsely punctured and sliining 13. 



l.'i. — Elytra yellow, a piceous spot on each elogaiitiiliiM. 



Elytra dark, bordered at tip with yellow 14. 



14.— Head and thorax with numerous punctures. 



Meththorax nearly black, elytra widely testaceous at tip teriliiiialiK. 



Metathorax reddish, elytra narrowly bordered at tip iiinbri|><'iiiiiN. 



Head and thorax very sparsely punctured; metathorax pale...lo|>i<liilii!«. 

 A. cinerasceilS Grav.— Form moderately elongate, piceous, opaque; legs 

 piceo-testaecous, the tibiae and tarsi usually darker; antennte shorter than the 

 head and thorax, brownish, slightly thicker externally, the joints all longer than 

 wide; head quadrate, very densely finely punctured and opaque, the vertex less 

 punctured: beneath densely punctured, more coarsely than above; thorax not 

 wider than the head, very little longer than wide; sides sinuate; surface rather 

 closely coarsely punctate, leaving a narrow smooth space at middle ; elytra slightly 

 broader than the thorax, feebly convex, longer than wide conjointly, densely and 

 finely punctured, sub-opaque, finely pubescent; abdomen densely very finely 

 punctured and opaque, the segments paler at their apices; beneath densely, less 

 finely punctured. Length .Ifi — .20 inch ; 4 — 5 mm. 



^o/e. —Anterior tarsi slightly dilated ; last ventral segment slightly emarginate. 

 Female. — Anterior tarsi very slightly dilated ; last ventral entire. 

 This species is easily known by the generally dense punctuation of the 

 upper .surface. No other species in our fauna has the head so densely 

 jiutictured beneath. 



Thi.s species occurs from Michigan to Florida, and is also widely dis- 

 tributed in Europe. 



A. nanus n. sp. — Form moderately elongate, black, moderately shining, legs 

 piceo-testaceous; antennse shorter than tlie head and thorax, rather slender, very 

 slightly thicker externally, brown, the basal and apical joints paler, joints all 

 l(jnger than wide; head quadrate oval, moderately shining, moderately punctured 

 at the sides and in front, a vertical smooth sjiace, beneath closely punctate; thorax 

 not wider than the head, slightly longer than wide; sides distinctly sinuate, disc 

 shining, a broad median smooth space, sparsely coarsely punctured each side; ely- 

 tra slightly wider than the thorax and longer, densely finely punctured, sub-opaque 

 and sparsely pubescent; abdomen densely, very finely punctured, sub-opaque and 

 pubescent; beneath densely punctulate, more shining than above. Length .18 

 inch; 4.o mm. 



Sexual characters as in chxriiacfii!^. 



This species is generally smaller than ctnn-darens, and differs in the 

 much less dense punctuation of the head and thorax. 



Occurs in Canada, Michigan and the New England States. 



A. inntilis n. sp. — Form rather slender, piceous, moderately shining, legs 

 testace<His; antennre shorter than the head and thorax, slightly thicker externally, 

 brownish, joints fi-IO as wide as long; head quadrate oval, ratlier coarsely not 

 densely punctured at the sides, beneath evidently punctured and alutaceous; 



TiiASS. AMKii. KNT. SOP. XI. (.57) .m:nk, 1884. 



