164 AROMATIC BUTTERFLIES 



we can perceive no odor are also scent-j)roducers, 

 even though their odors may be too ethereal for 

 human senses. 



The odors produced by butterflies are very 

 largely confined to the male sex, evidently for the 

 delectation of their mates, and the organs through 

 which they are produced may be divided into 

 three classes : extensible glands, situated upon 

 the abdomen ; tufts or pencils of hairs, found 

 upon various parts of the body, even including 

 the legs and wings ; and scales or scale-clusters, 

 confined entirely to the wings. In the first class, 

 that of extensible glands, we have the case of 

 Anosia and its allies, the males of which can pro- 

 trude from the terminal segment of the body 

 a sac-like finger, bristling with hairs, which upon 

 withdrawal are closely compacted into a pencil. 

 The odor emitted by this organ is said by Fritz 

 Miiller to be rather disagreeable when the pro- 

 cesses are fully protruded, and as being rather 

 faint in our species. I have never myself experi- 

 mented with it. Similar organs are found in the 

 allied Euploeinae, of some species of which de 

 Niceville says : " The males . . . may often be 

 observed patrolling a small aerial space, with the 

 end of the abdomen curled under the bodv toward 



