172 AROMATIC BUTTERFLIES 



there are any such scales peculiar to the male sex 

 is Laertias, which has the inner margin of the 

 hind wings reflected, concealing scales of a pecu- 

 liar character ; I have never taken a living male, 

 and so have been unable to detect any odor there, 

 but Edwards speaks of the butterfly as having 

 a strong and disagreeable smell which probably 

 orio-inates here: for Miiller has found in other 

 allied swallow-tails odors which arise from exactly 

 this source, the reflected margin being expanded, 

 he says, when the wings are moved strongly in 

 a forward direction, and allowing the odor to 

 escape. Indeed, Miiller asserts that in one spe- 

 cies there appear to be " two sets of males, emit- 

 ting equally strong but quite different odors," a 

 case which would be very similar to that of dimor- 

 phism in color or markings, — diosmism we might 

 call it. The odors which he discovered from the 

 different patches of this sort were in some cases 

 agreeable and in some disagreeable. 



According to Aurivillius, both male and female 

 of Oeneis noma of Europe have a musky odor, 

 and as he can discover no odor in either sex of 

 the Large Cabbage White (Mancipium brassicae), 

 a species in which the male possesses large andro- 

 conia, he looks askant at the so-called scent scales 



