on the genus Colias. 11 



the male being much more plentiful than the female. I 

 only obtained two of the latter, one of which I gave to 

 the British Museum, the other I kept myself. 



" Towards the end of September the examples become 

 worn and scarce, and early in October their place is 

 taken by Vautieri, which, however, appears in greater 

 numbers ; and instead of being confined to a few locali- 

 ties, is spread over the whole neighbourhood, and con- 

 tinues on the wing more or less abundantly till the 

 following May. I took it in every month from October 

 to May inclusive, and also found it abundant in the 

 Cordillera of the Central Provinces in January, at 

 Chilian in March, and in Valdivia in Februarj^ ; but I 

 have never found minuscula, except in three places near 

 Valparaiso. 



" Vautieri varies slightly in size and in the breadth of 

 the black margins of the male, and amount of clouding 

 in the female, which in the mountains are much darker 

 than in the lowlands ; but I never saw one of either sex 

 which could possibly be confounded with minuscula ; the 

 female of the latter is paler above, and darker and 

 greener beneath, the markings on upper side of hind 

 wings being confined to a single small dusky blotch. 

 In the male the black margin is invariably much 

 narrower than in Vautieri, and there is such a difference 

 in the appearance of the two species or varieties that it 

 would not be possible for anyone who was acquainted 

 with both to confound them. 



" It may be as you say, that one is the early brood of 

 the other ; but I fancy that, as minuscula is not out till 

 the end of August, and Vautieri is plentiful by the second 

 week in October, there is hardly time for the insect to 

 pass through its various stages (c/. p. 5). If, however, 

 this is the case, Vautieri must be triple-brooded, as 

 there are certainly two broods on the wing between 

 October and May. 



" Mr. Butler is decidedly wrong in considering Vautieri 

 and rutilans distinct. As I have said before, the species 

 varies slightly ; but I have examined a large number 

 and found it impossible to separate them." 



After reading these remarks I again examined the speci- 

 mens of Vautieri at the British Museum and in Mr. God- 

 man's collection carefully, and found very great variation 

 amongst them, though not more than I should expect ; 



