1268 FAMILY LV. TENEBKIONID^. 



B. depressus Rand., color of corticola, elytra finely costate, in- 

 tervals with a single rOA\' of coarse panctures, length 5-7.5 nim., is 

 said to occur in the Eastern and ^liddle States and Canada. 



Tribe VII. IIELOPINI. 



In this and the following tribes the front of head is separated 

 from the labrum hj a short transverse clypeus of leather-like tex- 

 ture. The present tribe is composed of medium-sized oblong or oval 

 species having the head immersed in thorax almost to eyes, the 

 latter transverse, emarginate and coarsely granulated; antennce 

 gradually thickened from base to apex ; front coxse rounded, middle 

 ones with distinct trochantin; hind coxa' narrowly separated, the 

 intercoxal process triangular; tarsi pubescent beneath, front and 

 middle ones of males usually dilated. The tribe is represented by 

 the single genus: 



XXV. liELOPsFab. 1775. (Gr., "a nail + face") 



Dark metallic species, usually with a strong lustre. About 35 

 are known, chiefly from the West and Southwest. But three have 

 been taken in the State, though two others perhaps occur. 



KEY TO INDIANA SPECIES OF HELOPS. 



a. Inner wings present. 



6. Side margins of tlidrax not undulated. 



c. Elytra finely striate ; intervals finely and sparsely punctured ; apex 



of last ventral segment with a depression. 234S. micans. 



cc. Elytral stria deep; intervals convex, almost without punctures; 



apex of last ventral without depression. venusixts. 



66. Side margins of thorax undulate; form narrower and less convex; 



elytral stria: deep. 2349. americanus. 



aa. Inner wings absent. 



d. Side pieces of prosternum with numerous shallow grooves. 



2350. .EREUs. 

 dd. Side pieces of prosternum coarsely punctured. cisteloides. 



2348 (7546). Helops micans Fab., Syst. Eleut., I, ISM, 157. 



Elongate-oval, convex. Blackish-bronzed, sliining; elytra with indis- 

 tinct bluish and greenish-metallic stripes. Autenmo slender, half the length 

 of body, the three outer joints shorter. Thorax one-half broader than long, 

 emarginate in front, margins feebly sinuate, angles rectangular; surface 

 coarsely, rather closely and irregularly punctate. Elytral stria- fine, indis- 

 tinctly punctate; intervals flat, finely and sparsely punctate. Apex of last 

 ventral with a broad hairy depression in male; a longitudinal and naiTow 

 one in female. Length 10-17 mm. 



