ATTEMPTED DIVISION OF BRITISH INSECTS. 387 



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

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

 Sciophila, Leia, Mycetopliila, Molobrus, Lestrema, Zygoneura. 



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, 

 antennae, 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. RhypJms. 



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 {Penthetrid), 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. Inhaljits flowers ; is 

 sluggish in its movements. Scatops. 



Stirps. — Culicina. 

 Natural Order. — Simuliites, Muscpdtoes. 



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 



