ATTEMPTED DIVISION OF BRITISH INSECTS. 387 



horizontally ; body very slender, the same length as the wings ; 

 legs long. Bolitophila, Macrocera, Synapha, Mycetobia, Platyura, 

 Seiophila, Leia, Mycetophila, Molobrus, Lestrema, Zygonema. 



Natural Order. — Rhyphites. 



Larva very elongate, smooth, cylindrical, encompassed by eleven 

 corneous shining rings ; head furnished with two hooks ; tail with 

 four short cylindrical tubes : inhabits the earth and cow-dung. 

 Pupa changes in the earth. Imago with filiform, sixteen-jointed, 

 antennee, rather longer than the head ; ocelli three ; maxillary 

 feelers four-jointed ; labium distinctly bilobed, other parts of the 

 mouth not fully developed ; wings broad, lying horizontally on 

 the body, which they much exceed in length. Rhyphus. 



Natural Order. — Bibionites. 



Larva elongate, attenuated at each extremity ; divisions of the seg- 

 ments deeply marked, and fringed with hairs ; head furnished with 

 two obtuse hooks : inhabits earth, on which it appears to feed, no 

 other substance being found in the intestines. Pupa changes in 

 the earth. Imago with stout, nine-jointed, antennae, not longer 

 than the head ; maxillary feelers four or five-jointed ; labium 

 pubescent and bilobed, the other parts of the mouth obsolete ; 

 head and eyes large in the male, small in the female ; ocelli three ; 

 wings frequently opaque, lying horizontally on the body, which 

 they equal in length. In the spring every lane and meadow swarms 

 with these insects, either sailing in the air like balloons, or 

 settled on flowers, vegetables, paling, walls, and even on the 

 ground. Bibio (Penthetria), Dilophus. 



Natural Order. — Scatopsites. 



Larva and pupa unknown. Imago, with antennae, cylindric-conic, 

 acute, twelve-jointed ; labium small, pubescent, and bilobed ; 

 maxillary feelers very short, exarticulate. Inhabits flowers ; is 

 sluggish in its movements. Scatops. 



STIRPS. — CULICINA. 



Natural Order. — Simulhtes, Musquitoes. 



Larva aquatic ; supposed to feed on vegetable substances ; elongate, 

 cylindrical, incrassated posteriorly, semi-transparent; two horns 

 rise nearly in front of the head, and extend forwards ; eyes or 

 ocelli four ; two fleshy prehensile legs appear to be placed beneath 

 the mesothorax, and two more at the posterior extremity : its 



