54 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



wing and cilia grayish fuscous, the latter lightly edged with rosy red. 

 Legs whitish inwardly, overlaid outwardly with tawny-red and with a 

 rosy-red suffusion; tarsi fuscous narrowly annulated with whitish. 

 Abdomen grayish-fuscous above, whitish beneath, strongly overlaid 

 with fuscous. 



Male genitalia. — Strikingly different fi'om those of any other de- 

 scribed North American species : Harpe only moderately clothed with 

 hairs at the cucullus and along the costal edge ; sacculus deeply folded 

 and very strongly sclerotized; clasper short, flattened, longitudinal, 

 constricted at middle, broadly rounded at its extremity. Anellus 

 broadly oval, moderately sclerotized, with a deep excavation on the 

 posterior edge. Vinculum broadly rounded. Aedeagus sharply bent 

 near the middle, slender, dilated at the distal end ; armed with many 

 short, stout, cornuti. Tegumen strongly sclerotized, more so along 

 the ventral edges. Socii strongly sclerotized flaps, very sparsely 

 clothed with hairs. Gnathos a small, round, spined knob. 



Female genitalia. — Genital plate broad, strongly sclerotized except 

 for a narrow, median, longitudinal membranous portion posterior to 

 ostium. Ostium large with deeply concave anterior edge, and open- 

 ing near anterior edge of genital plate. Ductus bursae membranous 

 except for a large sclerotized patch adjacent to bursa copulatrix and 

 a short portion before ostium ; anterior to the latter the ductus bursae 

 is constricted at the inception of the ductus seminalis. Signum a 

 small, irregular sclerotized plate. 



Alar expanse, 22-24 mm. 



Type. — In the United States National Museum. 



Type locality. — Not designated. 



Food plant. — Unknown. 



Distribution. — Rocky Mountains region of the United States and 

 Canada, and eastern Canada. 



United States records 



Arizona: White Mountains, Apaclie County, near McNary P. O., 2 {1-15-IX-25, 

 O. O. Poling). 



Canadian records 



Alberta: "Head of Pine Creek," Calgary, $ (VIII-5-05, F. H. Wolley-Dod). 

 British Columbia: Jesmond, S (2-VIII-1937, J. K. Jacob). 

 New Brunswick: Fredericktown, $ ("August 20"). 

 Ontario: Stittsville, $, 2 (21-VIII-1939, E. G. Lester). 



I have seen other specimens without locality labels. 



Remarks. — An easily recognizable species not to be confused with 

 any other described from North America. 



The type, which is before me, shows only a single white scale in the 

 single discal spot at the end of the cell as described by Walsingham, 

 but a "homotype" from Alberta, which is clearly this species, shows a 



