192 GRAMMAR OF ENTOMOLOGY. 



inhabits the water. Pupa changes on the surface 

 of the water, and continues floating : no material 

 alteration in the form takes place. Imago with 

 the antenna; eight-jointed ; the basal and second 

 joint are uniformly robust and hairy ; the ligiila 

 is large, fleshy, and bilobed ; ocelli three ; wings 

 narrow, reposing one on the other, and seldom 

 wholly covering the body, which appears on each 

 side ; alulte obsolete ; body very flat, short, and 

 wide. Flies in the sunshine, settling on leaves 

 and flowers. Stratiomys, Odontomyia, Oxycera, 

 Nemotelus, Sargus. 



685. Golden-banded flies (CA/«/sotoxJ<es.) Larva 

 and pupa unknown ; the former supposed to feed 

 on the roots of corn, &c. Imago with the antenna 

 six-jointed ; basal and second joint long and 

 slender, third very long and more robust, the 

 remaining three forming a slender and perfectly 

 uniform seta, which arises from near the base of 

 the third ; ligula large, much dilated, bilobed ; 

 wings divaricating, covering the body ; alula; small 

 or obsolete ; body very stout, convex above. In- 

 habits woods, &c. ; flies briskly in the sunshine. 

 Microdon, Chrysotoxum. 



686. Aphidivorous flies {Syrphkes). Larva 

 flat, capable of great elongation anteriorly ; inhabits 

 the leaves of plants, feeding on aphites. Pupa 

 changes adhering to the leaf. Imago with antennae 

 six-jointed; the first and second joints minute, 

 the third stout and somewhat globose : the re- 



