PLATE II 



FIG. I. TYPICAL JAWS OF AN AQUATIC 

 LARVA 



FIG. 2. MOUTH-PARTS OF THE HONEY BEE 



FIG. 3. ELEPHANT HAWK-MOTH, SHOWING THE LONG, SLENDER SUCKING 

 TONGUE OR PROBOSCIS TYPICAL OF THE LEPIDOPTERA 



EXPANDED PROBOSCIS OF THE BLOW-FLY 



