170 AROMATIC BUTTERFLIES 



a slightly honeyed odor over and above the carroty 

 smell which all the scales possess. 



In the next family, the little discal spot of 

 scales upon the upper surface of the fore wing of 

 the males of a large number of Theclini is well 

 known, but it has never been noted by any one 

 except Fritz Miiller that this patch of scales oc- 

 casionally has an odor of greater or less distinct- 

 ness. In the allied group of Lycaenini, the males 

 of which possess scales of peculiar battledore form 

 scattered over the upj^er surface of the wings, 

 we find in one of our own species, the Spring 

 Azure (Cyaniris pseudargiolus) , an exceedingly 

 delicate odor, which I can only describe as that 

 of newly stirred earth in the spring or of crushed 

 violet stems. 



Among the Pierinae, Miiller mentions several 

 instances of odoriferous scales, which in some 

 instances are collected into patches and in others 

 not. Tlius in Leptalis he finds on the portions of 

 the front and hind wings which conceal each other 

 a patch of scales emitting an odor of greater or 

 less strength according to the species ; an odor, he 

 remarks, which is " disagreeable to human noses." 

 So, too, in the males of several species of Calli- 

 dryas, he discovered in the patch of scales in the 



