APHIS- AND l.\ / / /" A - 



.-7 



Family Sialid;* llodj somewhat Battened, ol length; 



the antennae long and slender, sometii d or pectinated; 



the wings are lai veined, the hindei pair with the anal 8] 



folded, while the tarsi are 5 jointed. 



I • thia family belongs the great Corydalu cornutxu Linn , wl 

 - expand six inches. The jaws of the male arc enormously 

 enlarged, being Dearly an inch long, and can scarcely be used for 

 taking food. Its larva lives under stones in brooks, and is used for 

 bail under the name <>!" ". hellgrammite " In Gliduliodespeelinicornis 

 Linn., a much smaller insect, the antennae are pectinated. Sp< 

 • i Rapliidia, which have a very long narrow prothorax, inhabit the 

 Pacific coast. 



Family Hemerobidae.— Tin- body is slender, cylindrical, with large 

 net- veined wings, the hinder ones with no anal space. The larvae 

 arc peculiar in having large sickle-shaped mandibles which have a 

 groove beneath, in which the maxilla' slide hack and forth; with 

 these the) can pierce the bodies of small insects and suck their 



Fig. 77. Lace in log fly, side uuj tup yievt ; r^-gs ami larva. Eularg 



blood, without moving the mandibles on which the victim is im- 

 paled The larva of Chrysopa (Fig. 77) and Heinerobia are called 

 Aphis-lions, and destroy great numbcrsof those pests. The am lion 

 is the larva of Mvrmeleon. It makes a pit in fine sand, lying at the 



tag 



Fig, ;s m> rmeleon, and a, its larva, the ant 



bottom with its jaws wide open, ready to seize any It: 



which may fall in. Mantispa (Figs. 79, 80 is i mthe 



strange habits of its larva, which passes • "W 



