92 A. WATSON 



DIDYMANA Bryk 



Didymana Bryk, 1943 : 10. Type-species Didymana renei Bryk, 1943 : io, by monotypy. 



The affinities of this genus are doubtful, but it is possibly most closely related to 

 Palaeodrepana Inoue, especially to Palaeodrepana harpagula (Esper). Didymana 

 is monotypic. 



Didymana bidens (Leech) comb. n. 



(PI. n, fig. 357 ; Text-figs. 165-169) 



Drepana bidens Leech, 1890 : 113. 



Drepana bidens Leech ; Strand, 191 1 : 202. [Fig.] 



Didymana renei Bryk, 1943 : 10. [Good fig.] syn. n. 



Readily distinguished from Palaeodrepana harpagula (Esper) (p. 94), to which it is 

 possibly most closely related, by the colour-pattern (see Strand, 191 1 and Bryk, 

 1943) and the genitalia (Text-figs. 65-69). The shape of the seventh sternite and 

 the eighth tergite in the male are particularly diagnostic. 



Distribution. China (Hupeh, Szechwan, Yunnan, Shensi, Fukien) and N.E. 

 Burma. 



Material examined. Types, bidens. Holotype <$, [China, Hupeh], Chang Yang, 

 vii.1888 {Pratt) ; Drepanidae genitalia slide No. 82. In the BM(NH). 



renei. Holotype <$, N.E. Burma, Kambaiti, 2000 m. ; Drepanidae genitalia 

 slide No. 734. In the Naturhistoriska Riksmuseet, Stockholm. 



Other material. BM(NH). China : 6 ex., Szechwan. N.E. Burma : 14 ex. 

 Museum Koenig, Bonn. China : 29 examples from S. Shensi, Fukien and N. 

 Yunnan. Naturhistoriska Riksmuseet, Stockholm. N.E. Burma : 11 ^ paratypes 

 of renei, Kambaiti, 2000 m., 14.iv-14.vi.1934. U.S. National Museum. China : 

 1 (J, 2 $, Szechwan. 



PALAEODREPANA Inoue 

 (PL 4, figs. 330-332 ; Text-figs. 170-182) 



Palaeodrepana Inoue, 1962 : 21. Type-species Bombyx harpagula Esper, [1786] : 373, by 

 original designation. 



Inoue established this genus for three species : harpagula, binaria Hufnagel 

 (1769 : 516) and cultraria Fabricius (1775 : 621). Of these only harpagula is known 

 to occur in China — it is also represented in Britain and much of the western part of 

 the Palaearctic Region, a range matched only by Drepana curvatula Borkhausen. 



The closest ally of Palaeodrepana, more particularly of harpagula, is possibly 

 Didymana Bryk on the evidence of external and genitalic similarities. The species 

 binaria and cultraria may not be properly placed in Palaeodrepana and merit further 

 study in this respect. 



