98 BULLETIN 132, UNITilD STATES NATIONAL MUSEUM 



Fore wing smooth; termen straight; 12 veins, all separate; 7 to 

 termen ; 8, 9, and 10 approximate ; upper internal vein of cell from 

 between 10-11; 3, 4, and 5 not approximate at termen; 2 from cell 

 at %, straight. 



Hind wing with 8 veins ; 6 and T approximate toward base ; 3 and 

 4 separate; 5 approximate to 4; termen very slightly concave below 

 apex; male without chitinous ridge at inner margin. 



Hind tibia of male with short hair pencile from base. 



Male genitalia with harpe narrow, moderately elongate ; outer sur- 

 face unspined ; cucullus narrow, tapering, strongly spined ; sacculus 

 narrow, weakly spined at base ; spine cluster Spc ^ produced slightly 

 from base of cucullus; spine cluster Spc^ absent. Uncus strongly 

 chitinized, stout, tapering, curved, apex bluntly pointed. Socii ab- 

 sent. Gnathos heavily chitinized and solidly fused with anellus. 

 Aedoeagus long, slender, straight; cornuti absent. 



Female genitalia without signum. Ductus bursae rather short, 

 simple. 



In venation (except that vein 5 of hind wing is further separated 

 from 4 than 4 is from 3) this genus agrees with Polychrosis. The 

 latter, however, has very different genitalia. I note a similar sepa- 

 rate condition of veins 3 and 4 of hind wing in some specimens of 

 the European euphorhiana Freyer and lacunana Duponchel; but 

 these two have rather typical Olethreutes genitalia. Such discrepen- 

 cies but show the instability of structure in this family and the utter 

 impossibility of properly grouping the species upon any one set of 

 characters. 



KEY TO THE SPECIB3 OF AHMOSIA 



1. Median dark band of fore wing broad on dorsum ; alar expanse 14 mm. and 



over (1) galbinea. 



Median dark band narrow on dorsum ; alar expanse under 13 mm. 



(2) aspasiana, 



1. AHMOSIA GALBINEA, new species 



(Figs. 58, 186, 386) 



Palpus whitish ocherous; second joint with two fuscous spots on 

 outer side and a very slight fuscous shading toward apex; terminal 

 joint pale. Face and head whitish ocherous or very pale yellow. 

 Thorax brownish ocherous with very little paler scaling. Fore wing 

 sordid whitish ocherous, with the usual pattern markings pale brown 

 or ocherous fuscous somewhat dusted with blackish; basal patch 

 reaching to costa, outwardly angulate and deeply excavate below 

 middle; antemedian pale area broad and faintly streaked vertically 

 with pale ocherous fuscous ; merdian band broad, irregular and rather 

 poorly defined, strongly dusted with black on costa and at middle; 



