AMERICAN MOTHS OF THE SUBFAJVnLY PHYCITESTAE 



249 



of the gnathos ; but there are too many other differences 

 in male characters and adult habitus to permit their 

 lumping. The partially sclerotized aedeagus, the short 

 stout arms of the anellus, the squat appearance of the 

 whole male genitalia, the porrect male labial palpi, and 

 the serrate male antennae at once distinguish the males 

 of Rumatha from those of Cahela; and the wing patterns 

 readily separate both sexes. In Rumatha the discal 

 dot is prominent and the transverse lines on the fore- 

 wing are well defined for at least half their length. In 

 Cahela the distinctive wing markings are longitudinal. 



Three species are recognized as belonging to the 

 genus. Its distribution is limited apparently to the 

 southwestern part of the United States and possibly the 

 adjacent regions of northern Mexico, although as yet 

 no specimens have been received from Mexico. 



513. Rumatha glaucatella (Hulst) 

 FiGUEBS 542, 1028 



Honora glaucatella Hulst, Ent. Amer., vol. 4, p. 117, 1888. 

 Zophodia glaucatella (Hulst) Phycitidae of North Amer., p. 174, 



1890; U. S. Nat. Mus. Bull. 52, p. 430, 1S03.— Ragonot, 



Monograph, pt. 2, p. 23, ISOl. — McDunnough Check list. 



No. 6311, 1939. 

 Rumatha glaucatella (Hulst) Heinrich, Proc. IT. S. Nat. Mus., 



vol. 86, p. 365, 1939. 



Palpi, head, and thorax pale fuscous, sparsely 

 sprinkled with white; posterior margin of thorax edged 

 with blackish fuscous. Forewing dull white, sparsely 

 sprinkled with fuscous and with a very pale fuscous 

 stain in a broad area bordering inner margin; ante- 

 medial line angulate, fuscous, rather faint but complete 

 and always distinguishable; subterminal line double, 

 consisting of two parallel, faint, pale fuscous lines, 

 almost vertical and but very slightly dentate; discal 

 spot at end of cell blackish fuscous, prominent ; a row of 

 small blackish dots along termen between the vein ends. 

 Hind wing whitish with a very pale fuscous line edging 

 termen. Alar expanse, 15-20 mm. 



Male genitalia much smaller than those of either 

 bihinda or polingella ; basal portion of aedeagus narrower 

 in proportion; harpe with apex more bluntly rounded 

 than that of polingella but with width of harpe less in 

 proportion to its length than that of bihinda. 



Female genitalia with signum similar to that of 

 Cahela ponderosella, the inwardly projecting edge not 

 appreciably serrate; sclerotized plates in genital open- 

 ing very weak, hardly distinguishable except under 

 very high magnification. 



Larvae soUtary in habit, white, not banded or conspic- 

 uously spotted. 



Type locality: Texas (type in AA'INH, ex Eutgers). 



Food pl.a.nt: Opuntia (Cylindropuntia) leptocaulis De 

 Candolle. 



Distribution: Texas, San Benito (May, June, July, 

 Aug.), Brownsville (June), .San Diego (May), Laredo 

 (July) , San Antonio ; Florida (one female, so labeled and 

 without other locality, from the Fernald Collection, in 

 USNM). 



The labial palpus of the male is somewhat misleading. 



300329—56 17 



In natural position the third segment is projected 

 forward, but in relaxed and badly prepared specimens 

 it may be bent upward. 



514. Rumatha bihinda (Dyar) 

 Figures 540, 1030 



Zophodia bihinda Dyar, Ins. Insc. Menstr., vol. 10, p. 173, 1922. 

 Eumysia bihinda (Dyar), Ins. Insc. Menstr., vol. 13, p. 221, 



1925.— McDunnough, Check list No. 6301, 1939. 

 Rumatha bihinda (Dyar) Heinrich, Proc. U. S. Nat. Mus., vol. 86, 



p. 366, 1939. 



Palpi, head, thorax, forewing, and abdomen dark 

 fuscous, dusted with white, giving a decidedly grayish 

 fascous appearance to the moth; the white dusting 

 heavy on costal half of forewing and upper surface of 

 abdomen; discal spots and transverse markings on 

 forewings blacldsh fuscous. Forewing with area be- 

 tween ceU and inner margin brownish, with little or no 

 white dusting and with transverse lines obscured ; costal 

 half (especially above cell) strongly suffused with white; 

 transverse antemedial Une blackish, distinct only from 

 costa to fold; subterminal line markedly dentate and 

 sinuate, blacldsh, oblique, broad and conspicuous from 

 costa to vein 8, with a slight dentation between veins 

 8 and 6 and a deep angulation between veins 5 and 6 

 extending to cell, between vein 5 and the fold straight 

 and inwardly slanting, thence obscure to inner margin 

 of forewing; discal dots at end of cell normally con- 

 spicuous and fused into a single black spot, obscure in a 

 few specimens ; a row of black dots along termen at the 

 vein ends; in some specimens faint traces of a black 

 longitudinal line through center of cell and a line of 

 blackish scales along the fold. Hind wing white, 

 semihyaline, with a fine, faint, fuscous line along 

 termen and some fuscous shading on costal margin. 

 Undersurface of abdomen decidedly brownish fuscous, 

 sparsely dusted with white. Legs with femora whitish, 

 with some fuscous spotting; coxae uniformly dark 

 brown, with no white dustings or markings, strongly 

 contrasted against femora. Alar expanse, 30-36 mm. 



Male genitalia appreciably larger than those of other 

 species in the genus; harpe broader in proportion to its 

 length and with apex more broadly rounded. Female 

 genitalia similar to those of polingella and hardly to be 

 distinguished; signum with inner projecting edge irregu- 

 larly and bluntly serrate. 



Type locality: Jemez Springs, N. Mex. (type in 

 USNM). 



Food plant: Unknown. 



Distribution: Texas, Alpine (Apr.) ; N'ew Mexico, 

 Jemez Springs (June, July) ; Arizona, Yuma County 

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

 Dewey (May), Mohave County (Mar.); Nevada, Clark 

 County (Mar., Apr., May), Bellevue (Washington 

 County, May). 



This species has never been reared and its larva is 

 unknown. From its close relationship to glaucatella we 

 may expect that its host will prove to be one of the 

 Cylindropuntias, 



