394 



INTKODUCTION TO 



take the place of wings. The legs are long and formed for 

 leaping, and the mouth for suction. 



The larviTG are minute worm-like, footless grubs ; the pupae 

 are inactive, with legs enclosed in sheaths. 



13. DIPTEKA (Aristotle). 



-Flies. 



Various kinds of dipterous Flies (see pp. 31 — Si) : 1, 6, and 7, larvffi ; 2 and 

 3, pupa3, nat. size and magnified ; 4, 5, 8, and 9, Flies, magnified, with lines 

 showing nat. size. 



Wings " two," membranous ; in the place usually occupied 

 by the hind wings are a pair of slender filaments with a knob 

 at the end, called " poisers " or " halter es." Head usually 

 distinct, and horns generally inserted near together on the 

 forehead. Mouth formed for suction. Legs long. 



Daddy Loaglegs {Tipala olcracca), eggs, grub, and chrysalis. 



