126 A. WATSON 



postmedial fascia on the fore wing, and by the pale postmedial fascia and the 

 anastomosis oi Sc -{- R\ with Rs for a short distance distal to the cell in the hind 

 wing. The genitalia of both sexes are closely similar to those of albidescens but are 

 distinguishable by differences in the proportions of the various parts. 



Two subspecies are known : the nominate subspecies (Sikkim and N.E. India), 

 and pulvis (China) . 



Thymistadopsis trilinearia trilinearia (Moore) 

 (Text-figs. 246-249) 



Drepanodes trilinearia Moore, 1867 : 618. 



Drepana trilinearia (Moore) Hampson, [1893] : 33^- 



Drepana trilinearia (Moore) ; Hampson, 1897 : 288. 



Drepana trilinearia (Moore) ; Warren, 1922 : 467. [Good fig., as ' bilinearia '.] 



Drepana trilinearia (Moore) ; Gaede, 1931 : 30. 



Tridrepana trisulcata Warren, 1896 : 340. [Synonymized by Hampson, 1897 : 288.] 



Tridrepana trisulcata Warren ; Gaede, 1931 : 31. 



In some females the area between the antemedial fascia and the postmedial fascia 

 on the fore wing is heavily suffused with dark brown. In the remaining females 

 and all the males studied this area is greyish white. 



Separated from pulvis by the ostium in the female genitalia. (The male of pulvis 

 is not known.) 



Distribution. Sikkim and N.E. India. 



Type. LECTOTYPE <$, here selected, labelled : Darjeeling ; Moore Coll. 

 94-106 ; Drepanidae genitalia slide No. 745. In the BM(NH). 



Thymistadopsis trilinearia pulvis (Oberthiir) stat. n., comb. n. 



(PI. 12, fig. 374 ; Text-fig. 250) 



Drepana pulvis Oberthiir, 1916 : 375. 



Drepana pulvis Oberthiir, 1917 : pi. 428. [Good fig.] 



Albara pulvis (Oberthiir) Gaede, 1933 : 169. 



The type is the only known specimen apart from a doubtfully identified female 

 from Tu-pa-keo (Szechwan) in the BM(NH). 



Distinguished from the nominate subspecies by the female genitalia. 



Type. Holotype $, China, Szechwan, Siao-Lou, 1903 (Chasseurs indigenes du 

 P. Dejean) ; Drepanidae genitalia slide No. 746. In the BM(NH). 



Thymistadopsis undulifera (Hampson) comb. n. 



(Text-fig. 220) 



Drepana undulifera Hampson, 1900 : 228. [Good fig.] 

 Drepana undulifera Hampson ; Strand, 191 1 : 202. 

 Drepana undulifera Hampson ; Gaede, 1931 : 28. 



Until male specimens become available the affinities of undulifera will probably 



