XOKTH AMERICAN COLEOPTERA. o9 



Female. — Anterior tibise of normal form, the upper tooth more distinct tlian in 

 the male, the spur slender and acute. Metasternum feebly sulcate. Posterior 

 femora without tooth. 



The female front tarsi are also a little longer than in the male, 

 joints 2-3-4 being each longer than wide. 



At first sight this species might readily be mistaken for femoralis 

 by its form and coloration, bnt may be known by the feeble punc- 

 tures of the strise. The pubescence is very evanescent and the ma- 

 jority of cabinet specimens rarely show any. 



Occurs in Illinois and Kansas. 



A. f<pnioraIis Say. — Oblong, nearly parallel, moderately convex, piceous 

 black, sides of thorax indistinctly yellow, elytra fuscous, the base and often the 

 entire margin paler, femora reddish yellow, tibiae darker. Antennan testaceous, 

 club piceous. Head feebly convex, front very feebly trituberculate, surface 

 shining, very sparsely finely punctate % , or coarsely and rather closely punctate 

 9 : clypeus subtruncate, angles broadly rounded, sides arcuate, gense moderately 

 prominent, subacute. Thorax nearly twice as wide as long % , somewhat nar- 

 rower in the 9 , slightly narrowed in front, sides arcuate % , nearly straight pos- 

 teriorly 9 . hind angles distinct, but very obtuse, base arcuate, the marginal line 

 fine, but entire ; disc more convex in the % , sparsely and very finely punctate 

 in % , more coarsely and closely 9 ■ Elytra as wide at base as the thorax, hu- 

 meri obtuse, sides slightly arcuate, the disc with the striae fine and punctured, 

 the intervals convex, rather closely punctate at their sides, the punctures con- 

 fused with those of the striae so that the striae seem rather to be grooves con- 

 fusedly punctured, the outer intervals less punctate. Mesosteruum rather coarsely 

 punctate, not cariuate. Metasternum and abdomen obsoletely punctate. Ante- 

 rior tibiae tridentate externally, subcrenate above, the first tarsal joint shorter 

 than the second. Posterior femora very sparsely punctate, the first tarsal joint 

 as long as the next three. Length .18-.26 inch ; 4..5-6.5 mm. 



Male. — Anterior tibial spur rather stout, not more slender to tip and ol)tuse. 

 Elytra more coarsely punctured, the intervals apparently narrower. 



Female. — Anterior tibial spur gradually more slender and acute at tip. Elytra 

 less punctate, the intervals broader. 



In addition to the above characters, those of the head and thorax 

 are much more evident. The male el}'tra are also more shining, the 

 female finely alutaceous and with a greasy aspect. In both sexes 

 each interval has at summit a row of very distant punctures. The 

 color of the elytra is a little variable, and it will be observed that 

 the males are paler than the females, the general color of the form 

 being dull yellow, while the other sex is fuscous with a dull yellow 

 border and base. The pubescence is more permanent than usual in 

 species possessing it, and T have never .seen a specimen without it, no 

 matter how old. 



Occurs from Pennsylvania to Kansas and Texas, rare in ^Miussa- 

 chusetts (Blanchard). 



