226 CLASSIFICATION OF INSECTS. 



Aphidivorous flics or Syo'phites. Larva flat, capable of 

 great elongation anteriorly ; inhabits the leaves of plants, 

 feeding on ApJiiles. Pupa changes adhering to the leaf. 

 Imago with antennce six-jointed ; the first and second joints 

 minute, the third stout and somewhat globose : the remain- 

 der forming a seta attached to the third, near its base ; ligula 

 stout, dilated, bilobed : wings as in the Chrysotoxites ; body 

 glabrous, brown, banded with brighter colours. Flies in the 

 sunshine, settling on flowers. Ascia, Sphegina, BaccJia, 

 Eumerus, Psilota, Pipiza, Cheilosia, Scaeva, Syrphus. 



Sun-loving flies or Helophilites. Larva obese, generally 

 furnished with a long tube at the posterior extremity, 

 through which it breathes ; inhabits mud, and all kinds of 

 semi-liquid filth. Pupa changes in the air, attached to 

 walls, &c. Imago with antenn(B and mouth nearly as in 

 the preceding order ; ocelli three ; body more linear ; hind 

 femora often incrassated and curved ; colours brilliant. 

 Flies in the sunshine, settling on flowers. Helopliilus^ 

 Xylota, Myolepta, Eristalis. 



Bee-flies or Volucellites. Larva less elongate, spined at 



the posterior extremity; inhabits the nests 



of humble bees, feeding on the wax. Pupa 



changes in the same situation. Imago 



with antenncB six-jointed ; the portion 



forming the seta plumose ; parts of the 



mouth nearly as in the two preceding or- 



voiuceiia piumata. (igrs : ocelU thrco ; body obese, often very 



hirsute. Flies in the sunshine, settling on flowers. Crio- 



rhina, Sericomyia, Volucella. 



Long-tongued flies or Rhingiites. Larva and pupa un- 

 known. Imago with atitenna six-jointed, the third joint 

 somewhat cordate ; the portion forming the seta perfectly 

 naked : ligula slender, bifid, and capable of great elon- 

 gation J ocelli three ; body obese, naked, resembling in 



