400 PROCEEDINGS OF THE NATIONAL IMUSEUM vol. 86 



Male. — Unknown. 



Female. — Palpi, head, thorax, and fore wing of a soft, nearly uni- 

 form grayish fuscous (with a more brownish than slate-gray tint). 

 Fore wing without discal spot or transverse dark markings; costa at 

 base very slightly paler than ground color of wing, concolorous with 

 collar of thorax ; an obscure pale shade on midcosta and the faintest 

 indication of a pale subterminal line, the latter broadly angulate at 

 middle; some faint dark shading on the veins from cell to termen 

 and a row of small, dark dots along termen near the vein ends. Hind 

 wing white, semihyaline, with a pale fuscous line along termen; 

 cilia white with a narrow, pale fuscous, subbasal line. 



Alar expanse, 37-40 mm. 



Genitalia (fig. 76) with the doi^al plates in ductus bursae at 

 genital opening strongly sclerotized; ventral plate at opening slightly 

 larger than in any of the other species. 



Type. — In United States National Museum. 



Type locality. — Oaxaca, Mexico. 



Food plant. — Unknown. 



Remarks. — Known only from the female type and paratype from 

 the type locality. These specimens resemble suffused specimens of 

 femaldialis and langipennella except that the latter are more slat© 

 colored. The slight genitalic differences seem to indicate that insig- 

 natella is a good species and not a mere color form. 



5. CACTOBROSIS STRIGALIS (Barnes and McDunnoDgrh) 



Plates 35, 44, 51 ; Figures 39-39c, 77, l.'JS-lSSa, 13{)-139a 



Euzophera strigalis Barnes and McDuNNorGH, Can. Ent., vol. 44, p. 127, 1912; 

 Contr. Nat. Hist. Lopid. North America, vol. 1, no. 4, pi. 1, fig. 14, 1912. 



Cactobrosis strigalis (Barnes and McDrNNoi-OH), Chock list of the Lepidoptera 

 of Boreal America, no. 5G97, 1917. — Dyar, Insecutor Inscitiae Menstruus, 

 vol. 13, p. 224, 1925; Proc. Ent. Soc. Washington, vol. 30, p. 136, 192a 



Male. — Antenna strongly serrate. Palpi, head, thorax, and foro 

 wing grayish fuscous sprinkled with whitish (the ends of the scales 

 white) making the ground color a pale slate-gi'ay. Fore wing with 

 the veins outlined in black, the strongest black line being that along 

 upper vein of cell and vein 6 ; transverse lines and discal mark absent ; 

 no dots along termen. Hind wing white, semihyaline, with a faint 

 fuscous shade bordering costa, and a fine fuscous line along termen 

 for a short distance from apex. Tufts on eighth abdominal segment 

 weak. 



Alar expanse, 30-43 mm. 



Genitalia (figs. 39-39c) with vinculum moderately long, but con- 

 siderably shorter than in other species of Cactobrosis; aedeagus also 

 shorter. 



