TRIBE XII. ANTHONOMIXI. 311 



Georgia and Texas. Pierce (1907, 217) records it as breeding in 

 the heads of Hctcrotlicca xiiba.riUuns Lam. in Texas, the larva' 

 feeding on the achenes. 



SUBGENUS VI. (Sexartlirus.) 



We have combined under this subgeneric name all eastern 

 species of the genus Antlioncninis having the fnnicle only 0- 

 jointed. It embraces, therefore, the sultfuscni-ltix and -mnjulnns 

 groups of the snbgenus Anthonomns of I)ie1z, and also the eastern 

 forms of his snbgenus Ciu'iiiaci/llnx. They may be separated into 

 three groups as follows : 



KEY TO GROUPS OF SUBGENUS SEXARTHRUS. 



a. Form oval or oblong-oval; hind tibiae alike in both sexes. 

 I). Claws armed with a large distinct tooth. GROUP A. 



1>1>. Claws armed with a short basal tooth. GROUP B. 



oo. Form elongate, subparallel: hind tibiae of male curved. (Fig. 79, g.) 



GROUP C. 

 GROUP A. 



Species not over 2 mm. in length, having the fnnicle 0-jointed 

 and the claws armed with a long tooth. According to Fall C 1.913, 

 54) latiusculits Dietz is a synonym of subfasciatus Lee., and 

 molccnlns Casey the same as robnstiilus Lee. This leaves only 

 the two LeConte species and a third as yet undescribed, as mem- 

 bers of the group. 



KEY TO SPECIES OF GROUP A. 



a. Brown, pubescent; elytra with a partly denuded fascia. 



459. SUBFASCIATUS. 



oo. Black, in part scaly; elytra without fascia. 



6. Legs piceous; elytra without scutellar white spot. 460. ROBUSTULUS. 

 Itlt. Legs pale reddish-brown; elytra with scutellar spot of white scales. 



. ROBIN SONI. 



459 (8662). ANTIIONOMUS SUBFASCIATUS Lee., 1876, 205. 



Subovate, robust. Dark reddish-brown, head, thorax and suture often 

 darker; above thinly clothed with yellowish pubescence, which is conden- 

 sed on the scutellum and along the median line of thorax and forms a line 

 around the denuded fascia of elytra, the latter extending from the sides 

 to the suture. Beak as long as head and thorax, feebly curved, indistinct- 

 ly punctate, striate and carinate. Second joint of funicle slightly longer 

 than third, 4 6 short, rounded. Thorax one-fourth wider than long, 

 widest at middle, sides regularly rounded, disc densely and rather coarse- 

 ly punctate. Elytra ovate, one-third wider at base than thorax; striae deeply 

 impressed, coarsely and closely punctate; intervals rather wide, feebly 

 convex, almost smooth. Femora with a small acute tooth. Length 1.5 2 

 mm. 



