40 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii« 



white. Forewing yellowish creamy white. Hindwing creamy white. 

 Cilia white. 



Male genitalia: Uncus cm"ved, attenuated, and cleft at tip; gnathos 

 somewhat pointed at tip; harpes as in A. schlaegeri; anellus without 

 distinct lobes, aedeagus bluntly pointed at apex; cornuti a group of 

 heavy spines. 



Female genitalia: Genital plate small, bandlike; lamella antevagi- 

 nalis and postvaginalis similar in size and shape forming liplike struc- 

 ture; ostium bursae and ductus bursae sclerotized; ductus bursae 

 short; corpus bursae large, membranous, with large signum; inception 

 of ductus seminalis near ostium. 



Type: In the United States National Museum. 



Type locahty: Palmerlee, Arizona. 



Food plant: Unknown. 



Distribution: Arizona: Paradise, Cochise Co. (Aug.); Huachuca 

 Mts. NEW MEXICO: Albuquerque (July). Colorado: Kock Creek 

 Canyon (Aug.). 



This species is similar to A. vestalis in size and color, but the at- 

 tenuated cleft uncus in the male distinguishes A. thomasi from all 

 other described North American species of this genus. 



12. Antaeotricha haesitans (Walsingham) 



Figures 13, 35; Plate 2f; Map 6 

 Aedemoses haesitans Walsingham, 1912, Lepidoptera-Heterocera, vol. 4 (vol. 42 



in Godman and Salvin, Biologia Centrali- Americana), p. 154. 

 Aedemoses hessitans [sic] Heinrich, 1921, Journ. Agric. Res., vol. 20, p. 816. 

 Antaeotricha hesitans [sicj Busck, 1934, in Lepidopterorum catalogus, vol. 67, 



p. 23. 



Alar expanse 12 mm. 



Color: Face and palpus ochreous, palpus shaded with fuscous; legs 

 pale ochreous. Thorax ochreous dorsally. Abdomen ochreous. 

 Forewing pale ochreous with two oblique fuscous lines on apical 

 half, more basal one extending from origin of costal cilia directly to 

 tornus, apical one extending from dot near tornus obliquely to costa; 

 minute fuscous spot at base of cell and another at its apex; a few 

 minute fuscous dots at wing apex near base of cilia. Hindwing 

 ochreous, cilia ochreous. 



Male genitalia: Uncus long, broadened apically, somewhat indented, 

 gnathos well developed, sharply pointed at tip; harpes as in A. 

 schlaegeri; vinculum complete; anellus with two upright, sharply 

 pointed lobes curving laterad, one on either side of aedeagus ; aedeagus 

 long, thin, with many sharp processes at apex; cornuti absent. 



Female genitalia: Genital plate short, lamella antevaginalis small, 

 forming triangular flap over ostium, lamella postvaginalis larger, 

 smooth; ostium bursae and ductus bursae membranous; corpus bursae 



