170 BUTTERFLIES. 



453. Nepheronia hippia, Fabricius. 



A true butterfly of the plains, occurring rarely in the Terai and 

 in the low outer valleys. 



454. Nepheronia avatar, Moore. 



This very beautiful and distinct species occurs from 1,000 to 

 5,000 feet from April to November, and is not rare. 



455. Hebomoia glaucippe, Linna3us. 



Common from March to November from the Terai up to 5,000 

 feet. 



456. IxiAS PYEENE, Linnseus. 



Common throughout the warm months from 1,000 to 5,000 feet 

 elevation. It is highly seasonally variable ; the males of the dry- 

 season forms flying early iu the year are quite small and very lightly 

 marked with black ; the form flying in the raius is half as large 

 again, and is very richly coloured, with a heavy black border to the 

 hindwing. 



Subfamily Papilionin^. 



457. Teinopalpus imperialis, Hope. 



In Sikhim this fine butterfly is known to occur on the tops of 

 Birch Hill, Tiger Hill (Senchal), Tonglo, Tendong, and Rikisum, flying 

 from April to August. It is found also in the Khasi and Naga Hills, 

 and at Chang-yang in Central China. The female is far rarer than 

 the male. 



458. Ornithoptera ehadamanthus, Boisduval. 



Common iu the low valleys from May to October. It is found 

 also in Western and Central China. 



459. Ornithoptera pompeus, Cramer. 



Still more common than the preceding, occurring with it and at 

 the same time of the year. The North Indian form has been 

 described as a distinct species by Felder as 0. ccrbcrus, but cannot, 

 I think, be separated from the typical form, which was described from 

 Batavia in Java. 



460. Papilio (Pangerana) astorion, Westwood. 



Common from April to December and from the level of the 

 Terai up to 7,000 feet. 



461. Papilio (Pangerana) aidoneus, Doubleday. 



Far rarer than P. astorion, Westwood, and found up to 3,000 feet, 

 from April to November. 



462. Papilio (Byasa) ravana, Moore. 



A single pair of specimens of this species was recorded by 

 Mr. Moore from Darjeeling in 1857. Mr. Elwes also possesses two 



