NORTH AMERICAN COLEOPTERA. t8 



A small species resemhlino; in form and color tlie memhcrs of 

 Group K, but without the rou<>hly sculptured head and the trans- 

 verse clypeal plica. It is, however, very closely allied to the two 

 preceding species. 



Two specimens from eastern Florida, one of which was kindly 

 given me by Mr. H. Ulke. 



A. a'grofiif^ Horn. — Form less elongate, robust, convex, pale castaneous, 

 shining. Antenuse pale. Head convex, front not tuberculate, surface sparsely 

 and extremely finely punctulate ; clyiieus broadly, but feebly emarginate, the 

 angles on each side distinct, but not prominent, the sides arcuate, the gense not 

 more prominent than the eye. Thorax twice as wide as long, slightly narrowed 

 in front, sides feebly arcuate, hind angles distinct, but very obtusely rounded, 

 base arcuate and with a fine marginal line; disc convex with extremely minute, 

 sparse punctures, and with one oval group of coarse punctures midway between 

 the middle and sides. Elytra as wide at base as thorax, oval, sides arcuate, disc 

 finely striate, stria? finely punctured, intervals flat, with very minute and indis- 

 tinct punctures. Body beneath simrsely coarsely punctate. Anterior tibia; 

 smooth in front, strongly tridentate externally and crenate above, the first tarsal 

 joint longer than the second. Posterior femora stout, -spar.sely punctate, the 

 tibia stout ; first tarsal joint as long as the next three. Length .12-. 18 inch ; 

 •i~A.'y mm. 



MaZe.— Anterior tibial spur not more slender to apex, the tip obtuse. 



Female. — Anterior tibial spur slender and acute. 



In the latter sex the fine punctures of the disc of the thorax are 

 more distinct and ( in the unique) the group of coarse punctures is 

 absent. This may possibly be a permanent sexual character. The 

 form of this species is more robust than usual in the genus. It is 

 remarkable in not having the genae more prominent than the eye. 



Occurs in Florida and North Carolina. 



Series I-d. 



Head sometimes distinctly tuberculate or without trace of tuber- 

 cles. Thorax not explanate at sides, the basal marginal line usuallv 

 distinct. Anterior tibiae smooth in front. Mesostei-num without 

 carina (except very feebly in luquinatus). Color in great part pi- 

 ceous, the head and thorax always so, although at times pale at the 

 sides; elytra variable in color, black, piceous, dull red or yellowisli 

 and maculate. 



This series is more heterogeneous than any of those which precede, 

 as it contains those species which render inapplicable any division 

 based on the tuberculate or non-tuberculate head. 



The following table will as.'^ist in the recognition of the species: 



