THE CACTUS-FEEDING PHYCITINAE — HEINRICH 377 



regularly sinuate and dentate, decidedly slanting, obscured toward 

 costa ; no distinct discal marks at end of cell and no dots along termen. 

 Hind wing glistening white, semihyaline with a band of fuscous 

 shading along costa and a fine pale-fuscous line along termen for a 

 short distance from apex. 



Alar expanse, 27-37 mm. 



Genitalia (figs. 22-22c) with lateral edges of anellus finely and 

 irregularly serrate; vinculum with terminal margin evenly rounded, 

 lateral margins not concave or excavate. 



Female. — Color and markings as in the male except hind wings 

 dark smoky fuscous, the fuscous shading extending into the cilia and 

 strongly outlining most of the veins; hind wings paler toward their 

 bases. 



Alar expanse, 26-37 mm. 



Genitalia (figs. 55-55a) without any trace of signum; bursa nearly 

 smooth; ductus seminalis from ductus bursae a short distance from 

 genital opening. 



Type. — In United States National Museum. 



Type locality. — Baboquivari Mountains, Ariz. 



Food plant. — Echinocereiis polyacanthus Engelmann. 



Distribution. — United States: Arizona.^ Baboquivari Mountains 

 (July, Sept.), Roosevelt (July), Oracle (July), Huachuca Moun- 

 tains (Aug.), Chiricahua Mountains, Mohave County (Sept.). 



Eighteen specimens examined. 



ReTYiarks. — This species bears a strong resemblance to Cactohrosis 

 strigalis (Barnes and McDunnough) and might easily be confused 

 with it. The latter, however, has filiform maxillary palpi while 

 those of leuconips are distinctly squamous. Dyar seems to have over- 

 looked this character in placing many of his species. Also there is 

 a difference in the longitudinal markings. In strigalis the strongest 

 black longitudinal line is that along the top of the cell and vein 6, 

 while in leuconips the strongest line is that along the lower vein of 

 the cell. 



In two males and some of the females of leuconips there is a faint 

 brownish-fuscous suffusion on the lower third of the fore wing 

 (bordering the inner margin), but this is not distinguishable on all 

 specimens and does not seem to be a specific character. 



2. EREMBERGA CREABATES (Dyar) 



Plates 29, 49; Fiqubes 24-24c, 120-120a 



Olyca creabates Dyar, Insecutor Inscitiae Menstruus, vol. 11, p. 29, 1923. 

 Cactohrosis creaMtes (Dtae), Proc. Ent. Soc. Washington, vol. 30, p. 136, 1928. 



Male. — Palpi grayish fuscous. Head grayish fuscous shaded with 

 white. Thorax luteous, whitish toward anterior margin. Fore wing 



