360 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.86 



Genitalia not specifically different from those of cactorvm except 

 for a somewhat shorter ductus bursae. 



Type and paratypes.—V.S.'N.'M. no. 52750. Paratypes also sent 

 to Mr. Dodd. 



Type locality. — Arequipa, Peru. 



Food plant. — punt la {Cylindropuntia) exaltata Berger. 



Remarks. — Described from male type and five male and one female 

 paratypes, all from the type locality and reared by R. C. Mundell 



(Oct.-Nov. 1936). 



Apparently this species does not attack the Platypuntias. Mr. 

 Dodd writes that "the Platypuntia, 0. ficus-indica (which is a host 

 of cactorum in Argentina), is grown in cultivations around Arequipa 

 but seems to be immune from attack. Mr. Mundell states that he 

 found larvae in 0. exaltata growing alongside noninfested plants of 

 ■ficus-iTidica.^'' 



The species is easily recognized by the color of the hind wings and 

 the ocherous suffusion on the fore wings. 



Named in honor of R. C. Mundell. 



5. CACTOBLASTIS BUCYRUS Dyar 



Plates 26, 38 ; Figures 12-12c, 50-50b 



Cactoblastis biicynts Dyar, Insccutor Inscitiae Monstnins, vol. 10, p. 16, 1922; 

 Proc. Ent. Soc. Washington, vol. 30, p. 135, 1928. 



Male. — Much darker than males of other species of Oactohlastis. 

 Palpi and thorax heavily dusted with blackish scales. Head and 

 collar ocherous. Fore wing brownish fuscous; white dusting incon- 

 spicuous, the pale scales more ocherous than white; black antemedial 

 and subterminal lines somewhat obscured by the dark ground color, 

 conspicuous only toward costa, dentations of subterminal line as in 

 doddi; a row of seven black dots along termen at vein ends. Hind 

 wing brownish fuscous. 



Alar expanse, 30-32 mm. 



Genitalia (figs. 12-12c) with arms of anellus somewhat shorter 

 than those of cactoi^m, doddi, and mundelU. 



Female. — In color and markings similar to the male, pale dusting 

 on fore wing a trifle more noticeable, more whitish than ocherous. 



Alar expanse, 40-41 mm. 



Genitalia (figs. 50-50b) with bui'sa very minutely and sparsely 

 scobinate. The signum, like that of other species of Oactohlastis, is 

 individually variable. Extremes of variation are shown in figures 

 50 and 50b. 



Type. — In United States National Museum. 



Type locality. — ^Mendoza, Argentina. 



Food plants. — Trichocereiis, EchinopsiSj Denmoza, 



