LeConte.] 



AR^OCERINI. 407 



form of beak, and the first joint of the tarsi not hunger than the second. It 

 differs, however, by the basal ridge of the prothorax being not rectangu- 

 larly but only obtusely flexed at the outer ends, and not continuing along 

 the sides. The claws are cleft at the tips for about one-fourtli their length. 



1. A. rotundatus, n. sp. 



Elongate, dark brown, densely clothed with pale, cinereous and brown 

 pubescence; prothorax broadly rounded on the sides, hind angles rounded; 

 elytra oval, convex, striae deep, punctured. Length 1.4-2.4 mm. ; .05-.09 

 inch. 



Massachusetts to Louisiana. This species differs in form from the BracTiy- 

 tarsi by having the sides of the prothorax broadly rounded, and the elytra 

 slightly narrowed and rounded near the base. The body is rather elongate, 

 proportioned nearly as in jB. variegatus, dark brown, densely clothed with 

 brown and silvery gray pubescence; the head is flat, and the rostrum 

 slightly narrowed at the insertion of the antennae; the latter are testaceous, 

 with tlie club fuscous; prothorax longer than wide, gradually narrowed in 

 front and rounded on the sides, tip rounded; base broadly rounded, 

 transverse ridge not continued along the sides; hind angles obtuse, slightly 

 rounded. Elytra oval, convex, a little wider than the base of the prothorax; 

 humeral angles rounded, not prominent; striae rather deep, punctured; legs 

 testaceous. The antennae are rather stouter than in Brachytarsus, and 

 scarcely attain the base of the prothorax. 



Tribe IIL ARiEOCERINI. 



But two genera of this tribe have occurred in our fauna ; they are of 

 small size, and are easily known by the antennae being inserted in small 

 foveas upon the upper surface of the beak. The transverse carina of the 

 prothorax as in the preceding tribe is basal, suddenly flexed, forming a 

 right angle, and extended a short distance along the sides; the antennae 

 are slender, and the last three joints form a loose club. The elytra are 

 regularly striate as in all the preceding tribes and groups of the fomily. 



Antennae with second joint shorter than the first Arwocerus. 



" ^ " " as long as the first, elytra striate, ctaoragrus. 



AR^OOERUS Sch. 



1. A. fasciculatus Wollaston, Ann. Nat. Hist, v, (1870), 18 ; CurcuUo 

 fase. DeGeer, Mem. Ins. v, (1775), 276, pi. xvi. f. 2 ; Bruchus cacao Fabr., 

 Syst. Ent. 64 ; Ent. Syst. 1, 2d, 370 ;^Syst. El. ii, 397; Macrocephalus cacao 

 Oliv., Ent. iv. No. 80, 15, pi. 2, f. 21; Anthribus coffea;. Fabr., Syst. El. ii, 

 411 ; Amocerus coffece Gyll., Sch. Cure, i, 175 ; Labr. and Imhoff, Cure, i, 

 55 ; Anthribus capillicornis Say, Journ. Ac. Nat. Sc. Phila. v, 249 ; ed. 

 Lee, ii, 313. 



Atlantic and Pacific States in articles of commerce. This cosmopolitan 

 species has many other synonyms, which may be found in Harold and 

 Gemminger, Cat. Col. p. 2749. From these must be excluded Anthribus 

 mmtus Lee, Ann. Lye. New York, 1, 172, which, as mentioned above, be- 

 longs to Piazocorynus. 



