ROSS: HOW TO COLLECT AND PRESERVE INSECTS 



33 



the cave crickets, exemplified by Ceuthophi- 

 lus maculatus (Harris), fig. 22, and the 

 walking stick insects, of which our common 

 form is the tree-feeding Diapheromera fem- 

 orata (Say), fig. 23. In addition to these 

 some species of grasshoppers, crickets, and 

 cockroaches either develop no wings or have 

 only short ones. 



Cockroaches are among the most persistent 

 indoor pests we have, and several species of 

 grasshoppers do consistent damage to field 

 crops each year. The sporadic outbreaks 

 of the migratory lo- 



cust and red-legged 

 grasshopper cause 

 tremendous damage 

 to Illinois crops. 



Fig. 23.— Orthoptera. 

 Diapheromera femorata, 

 a walking stick insect. 

 Note the lack of wings. 

 Actual length about 3.0 

 inches. 



Isoptera Fragile or soft insects with chewing mouth- 



Termites parts. The mating forms are dark brown and 



have two similar pairs of wings, both pairs 

 delicate and having a fine network of veins. The workers are 

 white and soft bodied, live in colonies in wood, and are called 

 "white ants" as well as termites. They are not true ants. Our 



] 







Fig. 24. — Isoptera. Reticulitermes flavipes, the commonest kind of termite 

 found in Illinois. A, first form queen with wings spread, many times natural 

 size. This is the form that lays the eggs. B, worker nymph, natural size. 

 C, first form queen, natural size, with wings placed in their natural resting 

 position. 



