Fig. 39. — Segment of an Opiintia showing the work of the larva of a moth, Mimnrisfa flavidissimalis, a 

 serious enemy whose attacks cause a great destruction of young joints in Texas and elsewhere in 

 America. (Reproduced from "The Principal Cactus Insects of the U.S.A.," Bull. 113, Bur. Entom. 

 U.S.D.A., plate 3.) 



Fig. iO.-Gcrsfasdcria nohllh, one of the Cactus Weevils. The larva lives within the jmnt (x,r Fig. 43l 

 (Reproduced from Bull. 113, Bureau Kiitomol. T'.S.D.A., p. 30, fig. 3.) 



