398 Mr. A. R. Wallace on 



1. Dercas gobrias, Hewitson. 



Gonepteryx gobrias, Hew. Trans. Ent. Soc. 3rd ser. vol. ii. p. 246, 

 pi. xvi. f. 1, a* ; Butler, Proc. Zool. Soc. 1SG5, p. 432, pi. 

 XXV. fig. 4, i, $. 



Female. — Larger than the male, pale yellow, the discoidal spot 

 and transverse streak almost obsolete. 



2fa6.— Sumatra, Borneo (Coll. Wall., B. M.). 



2. Dercas Verhuellli, Van der Hoeven. 



Colias Verhuellii, Van d. Hoeven, Tijd. Nat. Gesch. 1838, t. 8, 

 f. 3, 4, ^. 



Rhodocera lycorias, Doubl. Zool. Misc. 1842, p. 77 (wood cut) ? . 



J£ab.—1^. India, Silhet (Coll. Wall., B. M.). 



The female has the apex of the wings more falcate and acute 

 than the male, and the markings and outline of the wings vary 

 considerably. 



In the " Genera of Diurnal Lepidoptera," Mr. Doubleday puts 

 his R. lycorias $ as a synonym of Z). Verhuellii, but retains 

 lycorias ^ as a distinct species from Silhet. As no specimen 

 answering to his description exists in the British Museum, or in 

 any private collection with which I am acquainted, I am inclined 

 to think that the specimen was probably compounded of the fore 

 wings and body of D. Verhuellii, with the hind wings of a Callidryas. 



3. Dercas JVallichii, Doubleday. 



Gonepteryx JVatlichii, Doubl. Proc. Ent. Soc. 1848, p. xlvii. 



G. urania, Butler, Proc. Zool. Soc. 1865, p. 458, pi. xxvi. f. 5. 



2fa6.— N. India (B. M.). 



This species agrees better with Dercas than with Gonepteryx, by 

 the short discoidal cells, though it is somewhat intermediate be- 

 tween the two genera. 



Gonepteryx, Leach. 



Of this genus two species of the European type enter the Indian 

 region on its north-western boundary, and these are probably 

 confined to the higher ranges of the Himalayas. A third species 

 has been described by Dr. Felder, from Northern China, 



