MUD- WASPS. 



383 



their leaf -cutting habits ; the soldiei's have large triangular 

 heads, while the workers have much smaller rounded heads. 

 Fig. 367 represents a species of Eciton. 



Fig. 367,— Eciton. 



Fig. 368.— Mud-dauber. 



The mud-daubers {Pclopmus, Fig. 368) build their nests 

 against stone walls, of pellets of mud, while the sand- and 

 mud-wasps dig deep holes (Fig. 369, Spliex icTmeumo7iea 



Fig. 369. — Sand-vvapp {Sphex). Natural size. 



Linn.) in gravelly walks, and have the instinct to sting 

 grasshoppers in one of the thoracic ganglia, thus paralyzing 

 the victim, in which the wasp lays her eggs ; the young 



