144 MEMOIRS ON THE COLEOPTERA 



Elytral striae deep and very distinct throughout the length, never more 

 than slightly stronger basally than apically 2 



Elytral striae very much finer and feebler apically than basally; body 

 not so large; elytra polished in both sexes 3 



2 Body large and broad, deep black and very shining, the elytra in the 

 female opaque; legs, antennae and palpi black; head large, the 

 impressions long, very deep and straight; epistoma and labrum 

 sinuate; mandibles smooth; prothorax transverse, one-half wider 

 than the head, nearly one-half wider than long, the sides rounded, 

 converging and becoming straighter basally, the angles abruptly 

 right and prominent; base sinuate medially, wholly unmargined, 

 four-fifths the maximum width; surface broadly and feebly convex, 

 broadly channeled and strongly reflexed at the sides, the anterior 

 transverse impression acute and lineiform, the posterior obsolete, 

 the median stria deep, subentire, the latero-basal impressions very 

 deep, broadly confluent basally, the inner extending for two-fifths 

 from the base, having a few fine scattered punctures; elytra oblong, 

 two-fifths wider than the prothorax, one-half longer than wide, the 

 sides parallel and feebly arcuate, the tip broadly, obtusely rounded; 

 striae very fine but deeply impressed, minutely punctulate, the 

 seventh finer than the others but distinct throughout, the scutellar 

 long and deep, the intervals rather convex, feebly so externally, the 

 humeral denticle obsolete; under surface finely punctured laterally. 

 Length (9) 22.2 mm.; width 8.3 mm. Missouri (St. Louis). 



haldemani Lee. 



Body smaller and relatively narrower, shining in both sexes, black; palpi 

 black, the antennae brown, black basally; head rather large, the eyes 

 prominent ; impressions deeply concave and straight but much shorter 

 than in the preceding; prothorax transverse, fully two-fifths wider 

 than long, two-fifths wider than the head, the sides rounded, moder- 

 ately converging and becoming gradually rather deeply sinuate 

 basally, the angles right, slightly everted and prominent; base 

 fully five-sixths the maximum width; surface rather depressed, 

 the stria and transverse impressions as in the preceding, the lateral 

 margins more abruptly and much less widely reflexed, the confluent 

 basal impressions deeply concave, with but few punctures, the inner 

 extending less anteriorly than in haldemani; elytra longer, fully 

 three-fourths longer than wide, barely a third wider than the pro- 

 thorax, parallel, with feebly arcuate sides, the striae less fine, im- 

 punctate and very deeply impressed throughout the length, the 

 seventh feebler but distinct throughout, the intervals very convex; 

 middle tibiae (cf) with the subapical inner tooth small though acute 

 and erect, the apical process obsolete; last ventral evenly rounded 

 and minutely margined throughout, the median sinus almost com- 

 pletely obsolete. Length (cf) 17.8 mm.; width 6. o mm. New York. 

 [complanatus Dej., and strenuus Lee.] tartaricus Say 



3 Elytral striae distinct though fine posteriorly, with the intervals 

 there feebly but perceptibly convex; body much broader in form, 

 with the head larger. Form oblong, feebly convex, polished, black; 

 head well developed, with very prominent eyes, the impressions 



