LeConte.] AR^OCERINI. 437 



form of beak, and the first joint of the tarsi not longer 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-fourth 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, strite deep, punctured. Length 1.4-2.4 mm. ; .05-.09 

 inch. 



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

 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 B. rariegatus, 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 the 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 Brachy tarsus, and 

 scarcely attain the base of the prothorax. 



Tribe IIL ar^uceuini. 



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 family. 



Antennae with second joint shorter than the first Arwncerus. 



" " " as long as the first, elytra striate. Chora^ns. 



AR^OOERUS Sch. 



1. A. fasciculatus Wollaston, Ann. Nat. Hist, v, (1870), 18 ; Curcul'.o 

 fasc. 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 

 0:iv., Ent. iv. No. 80, 15, pi. 2, f. 21; Anthribus coffem Fabr., Syst. El. ii, 

 411 ; ArcBocerus coffem Gyll., Sch. Cure, i, 175 ; Labr. and Imhoff", Cure, i, 

 55 ; Anthribus capillicornis Say, Journ. Ac. Nat. Sc. Phila. v, 241) ; 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 

 mcEstus Lee, Ann. Lj'c. New York, i, 172, which, as mentioned above, be- 

 longs to Piazocorynus. 



