ON NEW AND LITTLE-KNOWN BUTTERFLIES. 251 



underside of the forewing the usual orange coloration is replaced by 

 bluish-white. On the Skoro-la the late Mr. H. J. Leech and I in 

 1887 found C. eogene fairly common (though this species, as far as 

 my Himalayan experiences go, is never really common), a fair propor- 

 tion of the usual [Form I] females being obtained. But Form II 

 was very rare, we got one on July 31st, one each day on August 3rd 

 and 4th and two on August 5th, five in all, and we caught all we 

 saw. No other CoUas occurred on the pass while we were on it, and 

 there is no doubt that the bluish-white females of the Colias we took 

 there in company with many males and ordinary females of C. 

 eogene are actually a dimorphic female form of that species. 



Family HESPERIID^. 



Genus Barca, n. n. 



Mr. T. D. A. Cockerell in " The Entomologist", vol. xxxi, p. 45 

 (1898), having pointed out that the name Bejeania, Oberthiir, Et. 

 d'Ent., vol XX, p. 40 (1896), of which Dejeania bicolor, Oberthiir, 

 1. c, pi. ix, fig. 163, male, is the type, is preoccupied in Viptera, 

 I propose the name Barca for this handsome hesperid, found in 

 Tse-kou, Ta-tsien-lou, Mou-pin, and Sias-lou— all in Western China, 

 of which Mr. Oberthiir has kindly sent me seven male examples. 

 The female appears to be unknown. The genus has been described 

 by Messrs. Elwes and Edwards in Trans. Zool. Soc. Lend., vol. xiv, 

 p. 169 (1897), under the name Dejeania. 



EXPLANATION OF PLATE FF. 



Fig. 1. Euplcea (Crastia) kimbergi, Wallengeu ... ?,p. 



2. „ (Chirosa) era, n. sp. ... ... ^^ p. 



3. Callerebia nirmala, Moore ... ... ... ^ p. 



4. EJymniasi^Dyctis^melayU.s^. ... ... (J, p. 



5- '. » 9, p. 



6. Argynnis vitatha^MoovQ ... ... ... 9, p. 



7. Cyanirls shelfordii^ n. sp. ... ... ... ^, p. 



8. Nacaduba ni, n. sp.... ... ... ... ^, p. 



9. Lyccena datarica, Snellen ... ... ... ^,p. 



10. ,, glavca, Snellen ... ^, p, 



11. ClirysopKanus evansii, n. ^^. ... ... ^, p. 



12. Colias eogene, Yeldiev ... ... ... 9> P- 



( To be continued J) 



