78 



FF The interspaces rather finely granulate. 



G The pronotum widest at the middle, the sides straight, 

 evidently narrowed from the middle to the caudal 

 angles; the elytral interspaces rather strongly 

 convex on disc and declivity, finely granulate, and 

 usually distinctly wider than the striae; the last 

 ventral moderately punctured not coarsely rugose, 

 (PI. 21, fig. 2). Eastern species. 



porculus Er.* Page 79. 



GG The pronotum with the sides nearly parallel on the 

 caudal half, broadly rounded at the hind angles, 

 strongly narrowed in front; the elytral interspaces 

 only moderately convex rather coarsely granulate, 

 and usually narrower than the wide striae; the last 

 ventral coarsely rugose-punctate. Western species. 

 nigrinus Mannh. Page 79. 



EE The head and pronotum very finely smoothly punctured; 

 neither roughened nor granulate; very brightly polished- 

 New Mexico. nitidus Sw. 

 DD The interspaces flat or nearly so on the disc and sides, wider 

 than the finely punctured striae, which are only very feebly 

 impressed; the sutural striae not much wider and deeper than 

 the others; the pronotum much narrower than the elytra. 

 E The pronotum very elongate, nearly parallel behind, gradually 

 narrowed in front, moderately and not very closely 

 punctured on the disc; length 4-5 mm. Col., N. Mexico. 



longus Lee. 



EE The pronotum long oval or nearly as wide as long, coarsely 

 and rather densely punctured; seldom less than 5 mm. 

 in length. 



F A black, more elongate species; the pronotum long oval, 

 distinctly longer than wide; the elytral interspaces 

 faintly convex near the suture on the caudal half, and 

 the striae there faintly impressed. 



macer Lee. Page 79. 



FF A red, stouter species; the pronotum but little longer than 

 wide, the sides subparallel for over two-thirds the 

 length, then constricted in front; the interspaces 

 perfectly flat on the disc and sides, with the striae not 

 impressed. ruber Sw. Page 79. 



BB Small, very elongate species; distinctly pubescent; length, 4 mm. or 



less. 



C The pronotum a little narrower than the elytra, moderately, not 

 closely and not roughly punctured; the strial punctures moderate, 

 about as wide as the interspaces, which are coarsely granulate; 

 the pubescence distinct but sparse and very short. Indiana, 

 Montana, N. Mex. gracilis Lee. 



CC The pronotum very much narrower than the elytra, strongly rough- 

 ened and coarsely, closely punctured; the strial punctures coarse, 

 quadrate, rather wider than the coarsely granulate interspaces; 

 the pubescence rather long and suberect. 



longicollis n. sp. Page 79. 



AA The beak not carinate; very small hairy species; the pronotum with coarse 

 punctures and a few small punctures intermixed. 



* H. scobinosus Eichh. is said to be distinguished from porculus Er. by the sides of the pronotum 

 being gradually narrowed in front. 



