66 A. WATSON 



of abdomen greyish brown dorsally, 2-4 orange-yellow, 5-8 greyish brown. (Abdomen damaged 

 ventrally.) Forewing length: iyo mm. 



<$ genitalia. Juxta with small, posteriorly directed, digitate process medially, and scobinate, 

 lateral extensions. Costal arm of valve simple. Uncus carinate dorsally, hook-like and 

 curved ventrally at apex. Aedeagus without processes; vesica mostly scobinate. 



$. Not known. 



This species is placed tentatively in Astralarctia. The evidence from only two 

 specimens of canalis is not conclusive, but as the forewing shape and coloration 

 characters show some concordance between canalis and pulverosa, it seems reasonable 

 to place the former here at present and to remove it from the distantly related genus 

 Araeomolis. 



Material examined. 

 Araeomolis canalis Schaus, holotype $, Panama: [Panama City] (Schaus) (USNM). 



Colombia: i <$, Alto Rio Opon, Santander del Sur, 900-1050 m, 14-26.viii.1948 {Richter) 

 (ZSBS). 



NYEARCTIA gen. n. [Gender: feminine] 

 Type-species: Automolis leucoptera Hampson, 1920 : 144. 



(J. Palp short, extending to just above labrum; terminal segment minute. Proximal 

 half of antennae strongly bipectinate and densely setose; longest pectination 1 mm. Distal 

 half of antennae weakly bipectinate and setose. Thorax robust. Tymbal organ well developed. 

 Meso- and metathoracic tibia each with one pair of short terminal spurs. Venation of wings 

 as in Text-figs 24 and 25. Retinaculum bar-shaped. Wings without recognizable androconial 

 zones. 



$. As <$, but antenna weakly bipectinate, and outer margin of hindwing weakly convex. 



(J and § genitalia. See descriptions of type-species. 



The affinities of this genus are uncertain; the result of the complete lack of wing- 

 markings. The shape of the wings and the general structure of the male genitalia 

 suggest that it is probably fairly closely allied to genera such as Idalus and Selen- 

 arctia. Only one species is known. 



Nothing is known about the early stages. 



Nyearctia leucoptera (Hampson) comb. n. 

 (Text -figs 21-25; PI. 33, figs 202-204; PL 34, figs 205-207) 



Automolis albescens Rothschild, 1910a : 36, pi. 5, fig. 26. Holotype $, Guyana (BMNH) 



[examined]. 

 Automolis leucoptera Hampson, 1920 : 144. A replacement name for albescens Rothschild, 



1910a : 36, preoccupied by albescens Rothschild, 1910a : 26. 

 Automolis leucoptera Hampson; Seitz, 1921 : 368, pi. 51c. 



(J. Palp yellowish white ventrally, red dorsally. Head yellowish white, with reddish 

 brown transverse band between antennae. Scape of antenna red laterally, reddish brown 

 medially; flagellum dark brown, with some white scales dorsally at distal margin and along 

 medial pectination of each segment. Thorax yellowish white except for red area immediately 

 posterior to eyes. Tymbal organ with about 50 microtymbals. Prothoracic coxa red, with 



