Historical Resumé 89 
the virgin females from incredible distances, and it has long 
been known that the privet and convulvulus hawk moths, espe- 
cially during flight, diffuse a strong, musty scent. The males 
of a moth of the genus Cryptolechia and those of the 
Glaucopidae exsert from the apex of the abdomen two long, 
hollow filaments, from which proceeds a scent which is often 
very powerful to man. Similarly with the South American 
butterflies, the gigantic Morphos, the males extrude from each 
side of the apex of the abdomen a hairy, strong-smelling gland, 
of which the scent in M. adonis and M. cytheris resembles 
vanilla. In an interesting series of papers translated in this work, 
Mueller gives valuable information on the odor emitted by vari- 
ous species of Lepidoptera, and the precise location of the scent- 
bearing apparatus. On the relation of odor to sex attraction, 
he gives only the above information. 
