TKir.IO I. ACAMPTIM. .">l!l 



aa. Body not covered with a crust, usually glabrous and shining. 



(I. Front coxae separated by more than one-half their width; beak as 

 long as or longer than head, usually dilated at the end, its grooves 

 rapidly descending; funicle 7-jointed: body sometimes depressed. 



Tribe IV. COSSONIXI, p. 525. 



(hi. Front coxae very narrowly separated; beak usually shorter than 

 head, continuous with the front and equally stout; funicle 5- to 

 7-jointed; body subcylindrical. Tribe V. RIIYXCOLIXI. p. 537. 



Tribe I. ACAMPTINI. 



Species of elongate, subcylindrical form having- the base of 

 the short beak receiver! in a groove, the tip resting upon the front 

 coxa', which are contiguous, prominent, am! in part excavated 

 for its reception; club of antenna pubescent and sensitive only 

 near the tip; prosternum deeply and broadly emarginate in front; 

 second ventral segment longer than third and fourth united; 

 tibia? stout, sinuate on the inner side, strongly hooked at tip; 

 tarsi not dilated nor spongy beneath. One genus, treated as a 

 group of Oyptorhynchini by LeConte but associated with Cosson- 

 ina> in Biologia, is known. 



T. ACAMPTUS Lee., 187(5. (Gr., "without flexibility.") 



Distinct and aberrant species with narrow elongate body, 

 clothed with a dirt-colored crust and bristling with thick, erect, 

 clavate setre; beak stout, somewhat flattened above, as long as 

 head and not separated from the latter by groove or constriction; 

 eyes small, very widely separated, in great part hidden in repose; 

 funicle 7-jointed, the first joint longer, the others short, closely 

 united, gradually increasing in width (Fig. 13, f) ; femora not 

 toothed, tarsi slender, cylindrical, the third joint not bilobed; 

 claws slender, free and divergent. 



816 (8753). ACAMPTUS imunus Lee., 1876, 239. 



Elongate, subcylindrical. Dark reddish-brown, thickly covered with 

 dirty brown hair and short, erect, stout bristles, which conceal the sculp- 

 ture. Thorax projecting over the head, one-fourth longer than wide, 

 sides very feebly rounded, disc broadly constricted at apical third; apex 

 rounded, base feebly bisinuate, dorsal channel faint. Elytra at base 

 about one-fourth wider than thorax, subcylindrical, rounded behind, strial 

 punctures large, quadrate; third, fifth and seventh intervals wider, much 

 more prominent and bearing rows of bristles. Beneath very coarsely 

 punctured and with scattered, short, coarse hairs. Length 3 4 mm. 



Vigo Co., Ind., rare; May 20. Riverside and Edgebrook, 111., 

 -Tune 13 Aug. 12. Dunedin, Fla., April 4. Ranges from Ontario, 



