RECENT STUDIES OF THE MEXICAN COTTON BOLL WEEVIL. 



and Dietz in order to include all variations. These descriptions are 

 the joint work of Mr. W. D. Pierce and the writer: 



Anthonomus grandis Boheman. [Redescribed.] — Stout, subovate to ovate, ma- 

 hogany red to piceous and clothed with coarse baryta-yellow to raw sienna pubescence. 

 Beak long, slender, shining, and sparsely pubescent at the base; more or less dis- 

 tinctly striate to about the middle; apical half finely and remotely punctured; the 

 beak of the female is slightly longer and more slender than that of the male, more 

 shining, and less coarsely punctured and striate. The female antennae are inserted 

 at about two-fifths of the distance from the apex of the beak to the eyes, while the 

 male antennae are inserted at one-third the distance from the apex. Antennae slender; 

 second joint of funicle longer than the third; joints 3-7 equal in length, but becoming 

 gradually wider. The club may or may not be concolorous with the funicle and is 

 more or less distinctly annulate. Head conical, pubescent, coarsely but remotely 

 punctured, front foveate. Eyes moderately convex, posterior margin not free. 

 Prothorax about one-third wider than long; base feebly bisinuate, posterior angles 

 more or less rectangular; sides almost straight from base to middle, or slightly con- 

 verging, strongly rounded in front; apex sometimes constricted and transversely 

 impressed behind the anterior margin; surface moderately convex, densely and 

 sometimes subconfluently punctured; punctures irregular in size, sometimes coarser 

 about the sides; pubescence variable, often denser along the median line and on the 

 sides. Scutellum variable. Elytra oblong, scarcely wider at the base than the 

 prothorax; sides convex or subparallel for two-thirds of their length, thence gradually 

 narrowed to and separately rounded at apex, leaving the pygidium moderately 

 exposed; striae deep, punctures large and approximate; interstices convex, rugulose, 

 pubescence somewhat condensed in spots. Legs rather stout, femora clavate, anterior 

 always strongly bidentate, inner tooth long and strong, outer one variable in shape 

 but connected with former at base; middle and posterior femora unidentate or 

 bidentate. Tibiae moderately stout, more or less bisinuate internally; tarsi moderate, 

 claws broad, blackish, and rather widely separated; tooth almost as long as claw. 

 Length from 2.3 to 6.75 mm.; width from 1.1 to 3.6 mm. 



Anthonomus grandis Boheman. [Typical variety.] — Stout, subovate, almost pice- 

 ous, and clothed with coarse, baryta-yellow pubescence. Beak long, slender, shining, 

 and sparsely pubescent at base; more or less distinctly striate to about the middle; 

 apical half finely and remotely punctured; the beak of the female is slightly longer 

 and more slender than that of the male, more shining, and less coarsely punctured and 

 striate; the female antennae are inserted at about three-fifths of the distance from the 

 apex of the beak to the eyes, while the male antennae are inserted at one-third of the 

 distance from the apex. Antennae slender, second joint of the funicle longer than the 

 third; joints 3-7 equal in length, but becoming gradually wider; concolorous through- 

 out, usually mahogany red; club rarely distinctly annulate and usually with only the 

 faintest traces of whitish hairs on the apical margins of the first two joints. Head 

 conical, pubescent, coarsely but remotely punctured, front foveate. Eyes moder- 

 ately convex, posterior margin not free. Prothorax about one-third wider than long, 

 base feebly bisinuate, posterior angles more or less rectangular; sides usually almost 

 straight from base to middle, or slightly converging, strongly rounded in front; apex 

 sometimes constricted and transversely impressed behind the anterior margin; surface 

 moderately convex, densely and sometimes confluently punctured ; punctures irregu- 

 lar in size, sometimes coarser on the sides; pubescence condensed in a sharply denned 

 median vitta distinct from base to apex, also denser on sides. Scutellum narrow, 

 elongate, convex, usually cylindrical, rounded oblong. Elytra oblong, scarcely 

 wider at base than the prothorax; sides subparallel for two-thirds of their length, thence 

 gradually narrowed to and separately rounded at apex, leaving the pygidium moder- 

 ately exposed; striae deep, punctures large and approximate; interstices convex, rugu- 



