THE CACTUS-FEEDING PHYCITINAE HEINRICH 369 



Subterminal line not interrupted between veins 6 and 5 3 



3. A blackish curved line from antemedial line through cell to upper 



outer angle of cell 3. fieldiella (Dyar) 



No such blackish line connecting antemedial line and outer angle 



of cell 2. longipennella (Hulst) 



1. YOSEMITIA GRACIELLA (Hulst) 



Plates 28, 40, 44, 48 ; Figotes 21-21d, 57, 79, 111-llla 



Spermatopthora graciella Hulst, Entomologica Americana, vol. 3, p. 134, 1887. 

 Zophodia graciella (Hulst), Trans. Amer. Ent. Soc, vol. 17, 173, 1890. 

 Yosemitia graciella (Hulst) Ragonot, Memoires sur les L^pidoptferes, vol. 8, 



p. 13, 1901. — Baenes and McDunnough, Contr. Nat. Hist. Lepid. North 



America, vol. 3, no. 3, p. 199, 1916; Check list of the Lepidoptera of Boreal 



America, no. 5699, 1917. 

 Yosemetia graciella (Hulst), U. S. Nat. Mus. Bull. 52, p. 429, 1903. — Dyab, 



Insecutor Inscitiae Menstruus, vol. 13, p. 220, 1925. 



Male. — Palpi, face, head, and thorax pale brownish fuscous, the 

 palpi sparsely dusted with white, the tegulae with posterior ends 

 shaded with black. Fore wing pale brow^nish fuscous dusted and 

 streaked with black and dusted with white scales; the white scaling 

 concentrated on and strongly whitening the costal half of the wing; 

 the black scaling thinly dusted over the lower half of the wing 

 (between cell and inner margin) and outlining the veins; transverse 

 lines incomplete, blackish; the antemedial line indicated only by a 

 transverse dash in the cell and a dot or very short streak on inner 

 margin; subterminal line prominent from costa near apex to vein 8 

 (sometimes to vein 6), inwardly slanting, interrupted between veins 

 6 and 5, obscure between vein 2 and inner margin ; discal dots fused 

 into a line of black scales on discocellular vein; a row of small 

 black dots along termen between the vein ends. Hind wing whitish, 

 shaded with very pale fuscous at apex, along coeta, and narrowly 

 along termen ; cilia white with a very fine, pale fuscous, subbasal line. 



Alar expanse, 25-30 mm. 



Genitalia (figs. 21-21c) very little different from those of other 

 species in the genus ; the vinculmn is not so broad as that of -fieldiella 

 or so long as that of didactica; the anelli of the several species (figs. 

 18b, 19b, 20b, 21b) seem to offer the best characters for separating the 

 species on genitalic characters; those of graciella and longipennella 

 are much alike, but in didactica the arms appear to be more sharply 

 twisted and in fieldiella the basal portion is more narrowly sclero- 

 tized and the free arms, therefore, correspondingly longer. These 

 characters, however, may not be constant in long series. 



Female. — Superficially like the male except that the labial palpus 

 is appreciably longer, the anteimal pubescence shorter, and the hind 

 wings very pale, smoky fuscous rather than white. 



Alar expanse, 25-30 mm. 



