384 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XI. 



173. Zephyrus syla, Kollar. 



Found in Mussoorie find the hills to the northwards, very common 

 in seasons following a dry winter. It flies in May, June, and August. 



174. Zephyrus birupa, Moore. Plate V, Fig. 15a, 155, 

 larva ; 15c, pupa. 



Exceedingly common in Mussoorie, double-brooded, the first from 

 May to July, the second in September. The eai'lier brood is found in 

 shady woody ravines only, the later brood on the tops of hills. Mrs. 

 Robson has bred it at Mussoorie in May. The larva feeds on Rhodo- 

 dendron ardorum, Sm., Natural Order Ericacece, 



175. Zephyrus icana, Moore. 



Very rare in Mussoorie, more common at Nag Tiba ; it flies in 

 May and June. 



176. Zephyrus dohertyi, de Niceville. 



Found in a ravine near Nag Tiba, 8,5C0 feet elevation, in May and 

 June ; also in the Nila Valley in July, and the Pabur Valley in 

 Jaunsar in August ; the two last-named localities are in the interior 

 towards the snows. 



177. Zephyrus ziua, Hewitson. 



Found in Mussoorie only from May to July, some years it is 

 common, in others very rare. 



178. Euaspa milionia, Hewitson. 



Found commonly in Mussoorie only in shady ravines near running 

 water from May to July. 



179. Ch^toprocta odata, Hewitson. 



Occurs in great numbers in Mussoorie in May and June, and the 

 Ganges Valley in July, in fact, wherever walnut trees grow ( Juglans 

 regia, L., Natural Order Juglandece), and is a perfect pest in places, as 

 the larvas literally strip the trees of their leaves. Although the larva 

 spins a flimsy sort of web beneath which it hides, it is not of much 

 protection, as birds pick them out without any difficulty and with 

 great rapidity. The butterfly is most active at sunset, and is single- 

 brooded. The winter is passed in the egg state. 



