THE CACTUS-FEEDING PHYCITINAE — HEINRICH 387 



like setae on the inner side of several basal segments of the shaft 

 (fig. 130a) ; antenna of the female simple and pubescent. Labial 

 palpi obliquely ascending in both sexes. Maxillary palpus squamous. 

 Hind wing with veins 7 and 8 anastomosing beyond the cell; 3 and 

 5 stalked. Eighth abdominal segment bearing one pair or two 

 {odiosella) pairs of ventrolateral hair tufts. 



Male genitalia with apex of gnathos small or moderately large, 

 bifid; apex of harpe oblique (except in punicans) ; vinculum long; 

 anellus with base of plate broadly rather than narrowly sclerotized, 

 arms long, slightly twisted and curved; aedeagus rather long and 

 moderately stout (except in lucidalis) ; penis scobinate. 



Female genitalia with signum weak or absent {lucidalis)^ when 

 present developed as a thin, short, scobinate or shortly thorned plate 

 or a series or cluster of small, weak spines ; bursa copulatrix minutely 

 scobinate, at least toward ductus bursae (wrinkled in the South 

 American species) ; ductus bursae long or moderately long, scobinate 

 toward bursa; ductus seminalis from bursa near signum. 



Larvae wine-colored, olive-green, or blackish, not banded or con- 

 spicuously spotted; with two setae in group VII of abdominal seg- 

 ments 7 and 8 ; solitary feeders in fruits and flower buds of Opuntia 

 and Cereus^ sometimes (some South American species) in the stems 

 of Cereus. 



Eggs laid singly. 



Remarks. — This genus divides into two natural groups: The 

 North American species with unwrinkled bursa and minutely scobi- 

 nate ductus bursae, and all fruit or bud feeders, and the South Ameri- 

 can species with wrinkled bursa and coarsely scobinate ductus bursae 

 and either fruit or stem feeders. The West Indian species {luci- 

 dalis) is anomalous in some genitalic characters (small abdominal 

 tufts, rather slender aedeagus, long ductus bursae, and no signum), 

 but on habitus and other characters it appears closely allied to the 

 North American group. When males of all the species are known 

 it may be possible to give a separate generic designation to the 

 South American forms, but in the absence of definitive male char- 

 acters that does not seem justified. 



The papillalike setae in the male antemial shaft of Ozamia also 

 occur in Cactohrosis and Zophodia, but the last two genera are dis- 

 tinguished by filiform maxillary palpi. 



Seven species are here recognized as belonging to the genus. Its 

 distribution appears to be the southwestern part of the United States, 

 Central and South America, and the West Indies. 



