164 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol. 42. 



2. Elytra without an evident white cruciform post-median fascia. 

 d}. Prothorax trisulcate at base. 

 e^. Vestiture variegated with larger white scales above. 



curvilineata Champion. 



«^. Vestiture without white scales above totucana Champion. 



(P. Prothorax not trisulcate at base. 



/'. Prothorax more or less transverse. 



gK Elytra clothed with brown and black scales with prominent spot 

 of black scales at middle of fourth interspace. 



lineatocollia Champion. 

 g^. Elytra otherwise clothed. 

 h^. Prothorax comparatively small; elytra at least one-half wider; 

 claws at least mod^;rately divergent, 

 i*. Elytra black with brownish basal spot and post-median vitta; 



sutural intervals apically brownish basalis LeConte. 



i^. Elytra without basal spots but sometimes with faint post- 

 humeral Adtta and more or less distinct post-medjan vitta. 



/. Length 6-7 mm. porosa LeConte. 



f. Length 4 mm clathrata LeConte. 



h'. Prothorax large, about as wide as elytra. 

 k^. Elytral interspaces wide. 

 P. Claws slender and widely divergent; beak rugosely 

 punctate and carinate; elytra with post-humeral and 



post-median fasciae opuntise, new species. 



P. Claws small and approximate; beak rather short, very 

 finely punctate, not carinate; elytra with post-sutural 

 spot and post-median brownish T-shaped fascia; 



punctures shallow fasciata, new species. 



Jb^. Elytral interspaces rather narrow; claws moderately 

 divergent; beak short, punctate; elytra mottled, and 

 with strong humeral spots and post-median fascia. 



cactophaga, new species. 

 p. Prothorax distinctly longer than wide turbida LeConte. 



GERSTiECKERIA (PHILOPUNTIA) LESELEUCI Champion. 



Vera Cruz, Mexico; Juquila (Oaxaca), Mexico (Champion). 



GERST^CKERIA (PHILOPUNTIA) LACTI Champion. 



Campeclie (Yucatan), Mexico (Champion). 



GERST.ffiCKERIA (PHILOPUNTIA) NOBELIS LeConte. 



Described from the Boll and Belfrage collections, Texas. Breeds in 

 the lateral margins of the joints of Opuntia engelmanni and causes 

 great masses of black excrement and gum to form on the outside of 

 the joint. It has been taken at College Station, Victoria, Beeville, 

 San Antonio, Floresville, Encinal, Hondo, Corpus Christi, and Live 

 Oak County, Texas. 



GERST.fflCKERIA (PHILOPUNTIA) CRUCIATA Champloil. 



Toxpam (Vera Cruz) and Mexico City, Mexico (Champion). 



