162 Dr. A. G. Butler on the 



Var. 9. D. ithiela $ , = D. berinda ? . 



Nineteen specimens from Darjiling (including the type), 

 from the Khasia and Naga Hills and Assam ; thirteen of 

 these were received from Messrs. Godman and Salvin. Also 

 one example in the Hevvilson collection. 



D. berinda agrees with our solitary female. 



Var. 10. D. adelma. 



Chang- Yang, Central China (Leech). 



This form is even blacker than D. ithiela, the white discal 

 spots being replaced by grey streaks; the yellow at anal 

 angle and on abdominal area of secondaries has, however, 

 reappeared. 



Var. 11. D. patrua. 



Chang- Yang, Central China (Leech). 



Only differs from the preceding variety in the reduction of 

 the yellow patch at base of secondaries above and of all the 

 yellow markings below. It was most inconsistent on the 

 part of my excellent friend Mr. Leech to regard it as a 

 distinct species, and one of these days he will doubtless admit 

 as much. It may be supposed that my present action is also 

 inconsistent with that formerly taken by me ; but this is not 

 so. I have always followed the plan of regarding differently 

 marked types, especially if they did not agree in form and 

 had been received from different localities, as distinct species ; 

 but whenever I have obtained series of intergrades which 

 proved their identity, I have at once admitted the impossi- 

 bility of keeping them separate. A very small difference in 

 pattern may be of specific value, but a mere variation in the 

 size of spots between two specimens taken in the same 

 locality is most unlikely to be of importance. 



78. Delias aglaia. 



Papilio aglaia, Linnaeus, Syst. Nat. ed. x. p. 465 (1758). 



Papilio pasithoe, Linnreus* Syst. Nat. ed. xii. p. 755 (1767) ; Donovan, 



Ins. China, pi. xxx. fig. 2 (1799). 



Papilio dione, Drury, 111. Exot. Ent. ii. pi. viii. figs. 3, 4 (1773). 

 Papilio porsenna, Cramer, Pap. Exot. i. pi. xliii. D, E (1776). 



Darjiling, Assam, Silhet, Nepal, Tenasserim, Burma, 

 China. Thirty-four examples. B. M. 



Fifteen of the specimens were received from Messrs. God- 

 man and Salvin ; there are also four others in the Hewitson 

 collection. This species varies a good deal as regards the 

 amount of creamy yellow on the upper surface of the 



