166 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 90 



7. Fore wing with distinct elongate blackish dash between two 



discal spots. grotella Robinson (p. 192) 



Fore wing without such dash betulella Busck (p. 195) 



8. Second segment of labial palpus white irrorated with black and 



fuscous 9 



Second segment of labial palpus otherwise 11 



9. Third segment of palpus white with blackish-fuscous subbasal 



annulus and apex maculatella Busck (p. 194) 



Third segment otherwise 10 



10. Third segment of palpus fuscous irrorated with whitish and 



with whitish apex yakimae, new species (p. 185) 



Third segment whitish with black basal and subapical annula- 



tions palousella, new species (p. 171) 



11. Fore wing blackish fuscous or brownish fuscous, at least always 



dark 12 



Fore wing grayish or light brownish 14 



12. *" The two species of this couplet cannot be separated on char- 



acters of coloration; genitalia and food plant must be used. 

 Costa of fore wing with a distinct pinkish cast on underside; 



Upper Sonoran or Arid Transition Zones. 



whitmani, new species (p. 182); leptotaeniae Clarke (p. 184) 

 Costa without such pink color 13 



13. The two species of this couplet (angustati and multifidae) cannot 



be separated by the use of superficial characters. Collected 

 specimens may be separated as follows: 



(a) Hudsonian Zone, altitude about 6,000 feet, Cascade 



Range angustati, new species (p. 189) 



(b) Upper Sonoran Zone to Arid Transition timbered Zone 



in "intermountain" area; altitude 1,000 to 5,700 feet 



multifidae Clarke (p. 187) 



14. Alar expanse 19 mm. or less.. artemisiae dracvinculi Clarke (p. 169) 



Alar expanse over 20 mm 15 



15. Fore wing with conspicuous blackish-fuscous streak in cell. 



atrostrigella, new species (p. 168) 

 Fore wing without conspicuous blackish-fuscous streak in cell. 



artemisiella McDunnough (p. 181) 



KEY TO THE SPECIES OF DEPRESSARIA BASED ON MALE 

 GENITALIA 



1. Harpe with process from base of sacculus (figs. 198-205) 8 



Harpe without such process (figs. 191-197) 2 



2. Costa with prominent process before cucullus (figs. 194, 197) 3 



Costa without such process (figs. 191-193; 195, 196) 4 



3. Vesica armed with two or three straight terminal cornuti and a 



cluster of stout curved ones near middle (fig. 194a). 



atrostrigella, new species (p. 168) 

 Vesica armed with a cluster of straight, strong cornuti about 

 middle (fig. 197a) artemisiae dracxinculi Clarke (p. 169) 



•• The species of this group are very difflcult to separate and must be carefully examined for characters 

 under the microscope. A careful examination of characters coupled with data on habitat will serve to 

 distinguish them. 



