NO. 1988. STUDIES OF NORTH AMERICAN WEEVILS— PIERCE. 375 



with scales, with exception of club, wliich is finely pubescent. Pro- 

 thorax a little shorter than head; truncate at base and apex; ocular 

 lobes small, finely fimbriate; sides broadly arcuate, base not as 

 wide as apex, shghtly constricted in front of base; surface very 

 unevenly punctate with deep punctures of variable sizes; in speci- 

 mens showing color, two fasciae of brown scales ; vestiture as described 

 for beak. Elytra of females inflated as in Tosastes ovalis and glohu- 

 laris, wliile in males very little wider than the thorax; elytral striae 

 very fine, punctures fine, interstitial punctures irregular but as large 

 as strial punctures; surface sometimes mottled with brown. Under- 

 sides densely squamose and clothed as above. Last ventral seg- 

 ment in female elongate triangular, apically rounded, and longer 

 than the two preceding segments. Legs densely squamose ; corbels 

 of posterior tibiae with a double row of spines, inclosing an elliptical 

 squamose area. 



Described from 60 individuals collected by J. D. Mitchell and 

 R. A. Cushman on Prosopis glandulosa, June 13-17, 1908, on the 

 Rio Grande, in Brewster County, Texas. Part of the original set is 

 retained in the Dallas, Texas, collection. 



Type.— Cat. No. 14631, U.S.Nat.Mus. 



Genus OPHRYASTES Schonherr (1833). 

 Ophryastes Schonherr, Gen. et. Sp. Cure, vol. 1, 1833, p. 508. 



The originally designated type was sulcirostris Say. 



This genus presents many difficulties to the . systematist because 

 of the great variation in a series of one species from a single locality. 

 Up to the present the writer has been unable to obtain any satisfac- 

 tion from a study of it and beheves that only large series from many 

 localities will assist in finally separating the species correctly. 



OPHRYASTES OVIPENNIS Sharp. 



Ophryastes bituberosus Pierce (not Sharp). 



According to Champion ^ the specimen from San Diego, Texas, 

 recorded by the writer ^ as hituherosus is ovipennis. This undoubtedly 

 appHes to the other material also. 



OPHRYASTES COLLARIS Champion. 



This species is described by Champion from Texas and Nuevo 

 Laredo, Tamaulipas, Mexico. 



Genus TOSASTES Sharp (1891). 

 Tosastes Sharp, Biol. Centr.-Amer., Coleop., vol. 4, 1891, pt. 3, p. 91. 



In the absence of previous type designations we may consider 

 glohipennis Sharp as type of the genus. 



1 Biol. Centr.-Amer. Coleop., vol. 4, Dec, 1911, pt. 3, p. 318. 



2 Proc. U. S. Nat. Mus., vol. 37, 1909, p. 344. 



