CLASSIFICATION OF INSECTS. 183 



long. Bolitophila, Macrocera, Synapha, Myce- 

 tobia, Platyura, Sciophila, Leia, Mycetophila, 

 MolobruS) Lestrema, Zygoneura. 



663. Rhyphites (Rhyphites). Larva very elon- 

 gate, 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 ; 

 ligula distinctly bilobed, other parts of the 

 mouth not fully developed ; wings broad, lying 

 horizontally on the body, which they much exceed 

 in length. Rhyphus. 



664. Bibionites (Bibionites). Larva elongate, 

 attenuated at each extremity; divisions of the 

 segments deeply marked, and fringed with hairs ; 

 head furnished with two obtuse hooks : inhabits 

 earth, on which it appears to feed. Pupa changes 

 in the earth. Imago with short, nine-jointed, 

 antennae ; maxillary feelers four or five-jointed ; 

 ligula pubescent and bilobed, the other parts of 

 the mouth obsolete ; head and eyes large in the 

 male, small in the female; ocelli three. In the 

 spring and autumn every lane and meadow 

 swarms with these insects, either sailing in the 

 air like balloons, or settled on vegetables. Bibio, 

 Dilophus. 



665. Scatopsites (Scatopsites). Larva and 



