NORTH AMERICAN STENOMIDAE — DUCKWORTH 29 



36. Genital plate with large, median, elevated area directly posterior to os- 



tium 37 



Genital plate without such an area . . 6. Antaeotrieha decorosella (Busck) 



37. Ductus bursae thick, short, approximately same length as corpus bursae. 



7. Antaeotricha furcata (Walsingham) 

 Ductus bursae slender, long, approximately twice length of corpus bursae. 



1. Antaeotricha schlaegeri (Zeller) 

 or 2. Antaeotricha lindseyi (Barnesand Busck) 



38. Genital plate membraneous (Genus Setiostoma Zeller) 39 



Genital plate not membraneous 40 



39. Corpus bursae with signum 1. Setiostoma xanthobasis Zeller 



Corpus bursae without signum 2. Setiostoma fcrnaldella Riley 



40. Genital plate fused to eighth sternum (Genus Sienoma Zeller) 41 



Genital plate not fused to eighth sternum 42 



41. Corpus bursae with one lightly sclerotized signum. 



1. Stenonia mistrella Busck 

 Corpus bursae with two lightly sclerotized, dentate signa. 



2. Stenoma crambitella Walsingham 



42. Signum large, dumbbell-shaped, dentate. 



1. INIothonica kimballi, new species 

 Signum not as above 43 



43. Genital plate reduced to small, median, triangular sclerite. 



(Genus Menesta Clemens) 44 

 Genital plate reduced to simple liplike band surrounding ostium. 



1. Menestomorpha oblongata Walsingham 



44. Corpus bursae with heavily sclerotized, cross-shaped signum with median 



projecting lobe 1. Menesta tortriciformella Clemens 



Corpus bursae with heavily sclerotized, rectangular signum with median 

 projecting lobe 2. Menesta melanella Murtfeldt 



Genus Antaeotricha Zeller 



Antaeotricha Zeller, 1854, Linn. Entom., vol. 9, p. 390. 



1. Antaeotricha schlaegeri (Zeller) 



Figures 1, 24; Plate la; Map 1 



Cryptolechia schlaegeri Zeller, 1854, Linn. Entom., vol. 9, p. 372; 1855, Linn. 

 Entom., vol. 10, p. 158; 1873, Verh. Zool.-Bot. Ges. Wien, vol. 23, p. 246. 



Stenoma schlaegeri Walsingham, 1889, Insect Life, vol. 2, p. 152. — Barnes and 

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

 Forbes, 1923, Cornell Agric. Exp. Sta. Mem., vol. 68, p. 252. 



Antaeotricha schlaegeri Busck, 1934, in Lepidopterorum catalogus, vol. 67, p. 28. 



Alar expanse 21-27 mm. 



Color: Face white; palpus white, sprinkled with dusky scales. 

 Legs white; foreleg smoky; midleg with dark tarsi ringed with light 

 scales. Thorax white dorsally with brownish-black tuft posteriorly. 

 Abdomen white. Forewings white, basal half with conspicuous, 

 mixed light and dark brown, somewhat raised patch of scales on 

 hindmargin from basal angle almost to middle of wing, apical 

 half with irregular discal area of dusky scales; postmedial and 



