THE CACTUS-FEEDING PHYCITINAE HEINRICH 363 



Food plant.— O'puntia {Cylindropuntia) imhricata (Haworth) and 

 probably other Cylindropuntias. 



Distribution.— United States: California, Palm Springs (Apr., 

 Aug.), San Bernardino (Apr., May) ; Utah, St. George (May, June) ; 

 Nevada, Charlestown Mountains (July), Clark County (Apr., May, 

 June) ; Arizona, Yuma County, Mohave County (Apr., May), Dewey 

 (June), "en route from Dewey to Salome" (Apr.), Maricopa County 

 (July), Prescott (Apr., June), Redington, Baboquivari Mountains 

 (Pima County, May, July, Aug.), Phoenix (May), Tucson (June), 

 Douglas (May), Christmas (Gila County), Paradise (Cochise 

 County, June) ; Texas, Brewster County, Alpine (Apr.), Presidio. 



One hundred and thirty-two specimens examined. 



Dodd states that the range of the species includes the central 

 plateau of Mexico, which is what we should expect. I have seen 

 no Mexican specimens. 



Remarks. — The species is remarkably uniform in color and mark- 

 ings but varies considerably in size, which accounts for some of the 

 synonymy. Dyar described his purgatoria from an exceptionally 

 small female (26 mm). There is a male in the National collection 

 (from Phoenix, Ariz.) only 23 mm in expanse, but this is obviously 

 an abnormal specimen. Its genitalia are correspondingly smaller 

 than those of normal males. The usual expanse of both males and 

 females is about 35 mm. When Dyar described his three species 

 he had not seen the types of ponderosella and had very few speci- 

 mens from any locality. 



Superficially ponderosella is similar to both Ererriberga leuconips 

 (Dyar) and Cactohrosis strigalis (Barnes and McDunnough). 

 They also are dark gray with conspicuous black longitudinal lines 

 on their fore wings, but in leuconips and strigalis the black lines are 

 on the veins, while in ponderosella they lie between the veins. This 

 character at once distinguishes it from other known cactus phycitids. 



8. RUMATHA, new genus 



Genotype. — Zophodia hihinda Dyar. 



Antenna of male shortly serrate and pubescent, of the female simple 

 and pubescent, the pubescence shorter in the female than in the male. 

 Labial palpi porrect in both sexes; third segment of palpus about 

 half as long as second. Maxillary palpus squamous. Hind wing 

 with veins 7 and 8 anastomosing beyond cell; 3 and 5 stalked. 

 Eighth abdominal segment of male simple. 



Male genitalia with apical process of gnathos fused; harpe with 

 apex evenly rounded and with a subbasal sclerotized pocket {pM, 



109335—39 3 



