226 CLASSIFICATION OF INSECTS. 



Aphidivorous flies or Syrphites. Larva flat, capable of 

 great elongation anteriorly ; inhabits the leaves of plants, 

 feeding on Aphites. Pupa changes adhering to the leaf. 

 Imago with antenna 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, Baccha, 

 JSumerus, Psilota, Pipiza, Cheilosia, Sc&va, 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 antennas 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. Helophilus, 

 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- 

 voiuceiiapiumata. <} ers . oce m three ; 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 antennae six-jointed, the third joint 

 somewhat cordate ; the portion forming the seta perfectly 

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

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



