NORTH AIVIERICAN STENOMIDAE — DUCKWORTH 45 



2. Stenoma crambitella Walsingham 



Figures 17, 40; Plate 3e; Map 8 



Stenoma crambitella Walsingham, 1889, Insect Life, vol. 2, p. 154. — Barnes and 

 Busck, 1920, Contrib. Nat. Hist. Lep. North America, vol. 4, p. 238. — 

 Busck, 1934, in Lepidopterorum catalogus, vol. 67, p. 38. 



Alar expanse 22 mm. 



Color: Face and palpus white, palpus shaded with pale brownish 

 ochreous scales. Legs whitish, shaded with brown scales. Thorax 

 white dorsally. Abdomen whitish ochreous. Forewing white, few 

 grayish fuscous scales on extreme costal margin basally and single 

 dot of same color at apex of cell, apex somewhat pointed. Hindwing 

 white, tinged with ochreous; cilia white. 



Male genitalia: Uncus reduced in size, but not as much as in S. 

 mistrella; gnathos complete in front, forming a band; harpes as in S. 

 mistrella, but blunt at apex; vinculum complete; anellar lobes long, 

 slender; aedeagus short, broad; cornuti a small cluster of heavy spines. 



Female genitalia: Genital plate small, lamella postvaginalis fused 

 laterally with eighth sternite ; ostium bursae large ; ductus bursae long, 

 membranous; corpus bursae with two lightly sclerotized, dentate 

 signa. Inception of ductus seminalis near ostium. 



Type: In the British Museum (Natural History). 



Type locality: Arizona. 



Food plant: Unknown. 



Distribution: Arizona: Palmerlee; Redington; Santa Rita Mts. 

 (June); Santa Catalina Mts.; Chiricahua Mts. (Aug.). texas: 

 Kerrville (June). 



This species differs from Stenoma mistrella in the differently shaped 

 aedeagus in the male and in the presence of two lightly sclerotized 

 signa in the female. 



Genus Setiostoma Zeller 



Setiostoma Zeller, 1875, Verh. Zool.-Bot. Ges. Wien, vol. 25, p. 324. 



1. Setiostoma xanthobasis Zeller 



Figures 18, 18a, 41; Plate 3f; Map 9 



Setiostoma xanthobasis Zeller, 1875, Verh. Zool.-Bot. Ges. Wien, vol. 25, p. 324. — 

 Busck, 1925, Proc. Ent. Soc. Wasliington, vol. 27, p. 48; 1934, in Lepidop- 

 terorum catalogus, vol. 67, p. 2. 



Alar expanse 12-14 mm. 



Color: Face and palpus lemon yellow. Legs dark brown; foreleg 

 with coxa entirely white, tarsi ringed with white; midleg with two 

 tibial rings; tibial spurs and tarsal rings white. Thorax brown 



