340 CALIFORNIA ACADEMY OF SCIENCES. 



LoPHOPCEUM voLiTANs Lec. Cabo San Lucas. 

 EsTOLA soRDiDA Lec. San Jose del Cabo. 



Tapeina nudicornis Bates. This species has been 

 placed doubtfully in Tapeina b}^ Mr. Bates. He seems 

 not to have recognized the sexes in his material, but I 

 can now assert that the males do not have the head 

 broadened as in transvcrsifroiis.. The females in both 

 species have a slight fovea in the last ventral segment, 

 while the male segment is plain. This with an Arizona 

 species will constitute a new genus in the second part of 

 this essay. 



Occurs in Mexico, Oaxaca. Sierra El Chinche 2,000 

 feet. 



Tetraopes elegans n. sp. San Jose del Cabo. 



CHRYSOMELID.^. 



Lema PENINSULA Crotch. Cabo San Lucas. 

 Lema flavida n. sp. San Jose del Cabo. 

 Lema omogera n. sp. El Taste. 



Lema texana Cr. Illinois, Texas. Coral de Piedra, 

 El Taste. In the specimens from this region the elytra 

 are more decidedly green. 



Lema ^mula n. sp. Sierra Laguna, El Taste. 



Babia costalis Lac. Mexico. Pescadero. 



Coscinoptera ^neipennis Lec. Texas, Arizona. 

 San Jose del Cabo. 



Coscinoptera seminuda Horn. Utah, Arizona. Sierra 

 El Chinche. 



Coscinoptera mucorea Lec. Arizona, southern Cal- 

 ifornia. Baja California (Ulke). 



