NO. 1889. DESCRIPTTONS OF ECONOMIC WEEVILS— PIERCE. 165 



GERST.«:CKERIA (PHILOPUNTIA) CURVILINEATA Champion. 



This species is described from Mexico (Champion). 



GERST.aECKERIA (PHttOPUNTIA) TOLUCANA Champion. 



Tliis species is described from Toluca, Mexico (Champion). 



GERSTiECKEIUA (PmLOPUNTIA) LINEATOCOLLIS Champion. 



This species is described from Sierra de Durango, Mexico (Cham- 

 pion). 



GERST.«:CKERIA (PHILOPUNTIA) BASALIS LeConte. 



Tliis species is described from Colorado. Specimens are at hand 

 from Denver, Greeley, Canon City, and Sodaliii, Colorado, and Chey- 

 enne, Wyoming. Specimens were taken on Opuntia in Sioux County, 

 Nebraska, by Dr. R. H. Wolcott. 



GERSTiECKERIA (PmLOPUNTIA) POROSA LeConte. 



This species is either very variable in color markings or else there 

 is a large number of extremely closely related species, which at pres- 

 ent the writer })refers to call geographical races. Specimens are at 

 hand from Kansas; Denver, Colorado Springs, and Sedalia, Colo- 

 rado; Albuquerque and Mesilla Park, New Mexico; Fort Grant, 

 Arizona; San Diego, Floresville, Live Oak County, D'Hanis, and 

 Hondo, Texas. The species breeds in flat cells in* the large flat- 

 leaved Opuntias. 



GERST.ffiCKERIA (PHILOPUNTIA) CLATHRATA LeConte. 



This species was described from Colorado. It is at hand from 

 Colorado Springs, Colorado; Santa Rita Mountains, Arizona; San 

 Diego, Laredo, Hidalgo, Uvalde, and BrowTisville, Texas. The spe- 

 cies breeds in the stem of Opuntia leptocaulis and is sometimes so 

 numerous that it causes great bunchy deformations of growth. 



GERST.ffi:CE:ERIA (PHILOPUNTIA) OPUNTI^E, new species. 



Encinal, Texas, April 10, 1908, under Opuntia, J. D. Mitchell (two 

 specimens). 



Length, 6 mm. Black, with antennae and legs piceous-black; 

 vestiture consisting of white, yellowish, and brownish scales. Beak 

 shining, carinate, strongly, rugosel}^ punctate; front sulcate, eyes 

 separated by one-half the width of the beak. Head and base of beak 

 clothed with white scales, which are a little darker at vertex. Pro- 

 thorax large, transvei-se, strongly convex, much narrowed to apex, 

 shining, deeply and closely punctate; vestiture brown, with a few 

 scattered paler scales. Elytra oval, barely one-tliird wider than pro- 

 thorax; strial punctures large, round, squamigerous, rather shallow; 



