104 



ORDER IIEMIPTERA 



Some of the forms have juhilt liibernation and others egg 

 hibernation. 



Family Cercopidse. — The CercopidcF is a family that has 

 few economic s])ecies. • They differ from the Fulgoridse in 

 having the head and thorax rather normal in shape, first 

 pair of wings usually thickened opaque and ^Tnation not 

 very conspicuous. The thorax is well developed, the tibia 

 terminates in a prominent crown of spines and no spines 



Fig. G1. 



Aphrophora i-notata Say: a, from above; /), from side. 

 (From Lugger, Minn. Ann. Rept. 6.) 



on the sides of the tibia. These inchide the little frog hop- 

 pers or "spittle insects." The hxrvte suck the juices of the 

 plants on which they occur and pump out more juice than 

 they have use for and extrude it from the body in fluid form 

 and set air free within this juice, making the frothy mass 

 which covers the entire body of the larvae. These masses 

 are found hanging on the stems of plants very frequently 

 during the summer. After they ha\e passed through the 



