NORTH AMERICAN COLEOPTERA. 95 



a little longer than the body, piceous ; second and third joints small, a little 

 longer than half the fourth. Head piceous, smooth, vertical impression moder- 

 ate. Thorax nearly as long as wide, sides slightly arcuate in front and feebly 

 sinuate posteriorly, disc smooth, vaguely bifoveate. Elytra sparsely punctate,- 

 smoother at base and apex, vaguely subsulcate, and with an obtuse carina from 

 umboue three-fourths to apex ; color piceous black shining, the margin yellow, 

 expanding to a spot at apex ; femora yellow, with the upper edge piceous, ante- 

 rior and middle tibiae piceous externally, yellow on inner side, posterior tibite 

 and all the tarsi, piceous. Length .20 inch. ; 5 mm. 



Male. — Last ventral truncate ; first joint of front tarsus dilated and thickened. 



Female. — Last ventral oval at tip. 



In one specimen before me there is an indefinite yellow spot on 

 each side of the suture near the base, as if varieties of the species 

 might occur with trivittate elytra as in vittata. 



This species is peculiar among those in our fauna in having the 

 antennse longer than the entire body. 



Occurs in New Mexico, special locality unknown (Schaupp). 



n, atripeiiuis Say, Journ. Acad, iii, p. 461; ed. Lee. ii, p. 224; crisfata 

 Harris, Trans. Hartf. Nat. Hist. Sec. p. 90; fossata Lee., Proc. Acad. 1858, p, 88. 

 — Oblong-oval, narrower in front, either entirely black, or with the thorax and 

 abdomen yellow. Antennae three-fourths the length of the body, black; joints 

 2-3 small, nodiform, together scarcely longer than half the fourth. Head smooth, 

 vertical fovea feeble. Thorax broader than long, sides arcuate in front, sinuate 

 posteriorly, disc smooth, bifoveate. Elytra obsoletely sparsely punctate, vaguely 

 subsulcate, with an obtuse carina from the umbone three-fourths to apex; tibiae 

 distinctly cariuate. Length .15 — .20 inch. ; 4 — 5 mm. 



Male. — Last ventral truncate and broadly emarginate ; first joint of front 

 tarsus slightly broader and thicker. 



Female. — Last ventral oval at tip. 



Var. atripennis Say. — Thorax and abdomen yellow. 



Var. crestata Harris. — Thorax yellow, with a median stripe black. Abdomen 

 black. 



Var. fossata Lee. — Entirely black. 



A rather common species distributed from Massachusetts to Da- 

 kota, Kansas and Texas. 



9 D. lemiiiscata Lee, Trans. Am. Ent. Soc. ii, 1868, p. 58.— Form elongate, 

 parallel, piceous black, shining, each elytron with the side margin and a vitta 

 yellow. Antennae piceous, three-fourths the length of body, joints 2-3 small, 

 together not as long as the fourth. Head smooth, vertical fovea moderate. 

 Thorax a little wider than long, sides arcuate in front, slightly sinuate poste- 

 riorly, disc smooth, bifoveate. Elytra sparsely and indistinctly punctulate and 

 alutaceous ; disc very vaguely subsulcate, an obtuse plica from umbone toward 

 apex. Body beneath and legs entirely black ; tibiae distinctly carinate. Length 

 .20— .24 inch. ; 5—6 mm. 



Male. — Last ventral truncate and broadly emarginate; first joint of anterior 

 tarsus slightly thickened. 



Female. — Last ventral broadly oval at tip. 



TKANS. AM. ENT. SOC. XX. JUNE, 1893. 



