THE HAWK MOTHS (SPHINGIDM). 



221 



structural characters is brimful of interest. Most of the 

 Macroglossinae bear a complete resemblance to humming- 



FIG. 41. A long proboscis (Cocytius cluentius). 



birds, due to their large, expansile tuft of hair-scales 

 at the extremity of the abdomen, and their custom of 



