i;2 AN INTRODUCTION TO 



of a but": , 141)- This insect lives on the sap of apple, pear, 



and other tree-. It is of a yellow: n color. The .v hud in 



little >lits in the bark; they hatch in the spring; and the 



you different from the adult, being furni>hed 



fwith a pair of large spines upon each segment. 

 The Two-horned Tree-hopp > also 



a common species. It resembles the Buffalo Tree-hopper 

 [n iize ami form. It is a pale, dirty yellow, spotted with 

 <w.i- Drown ; the lateral and caudal aspect of each hoi: 



brown ; the caudal tip of the prothorax, and a I 

 midway between the tip and horns are also brown. The in>c 

 densely clothed with hairs. 



The genus Enchcnopa illustrates another strange form found in 

 this family. The Two-marked Tree-hopper, Enchciwpa binotata, (,Fig. 



abounds on various trees, shrubs, and herbaceous 

 plants. It is gregarious; and both adult and immature 

 forms are found clustered together. It is almost always 

 attended by ants. It lays its eggs in frothy masses, which FJG _ 

 are very white, and appear like wax. These egg-masses 

 been mistaken for insects of the genus Orthczia. 

 Another very common species is E. curvata. It is brownish, un- 

 spotted, and has a rather longer horn than the preceding spev 



" To the genus Tclatiwna (Fig. 143) belong our 

 indigenous humpback forms, of gray, claret, or 

 greenish colors, which live in June and July upon 

 oaks, hickories, and other forest trees. They gen- 

 erally rest singly on the limbs and branches of the 

 trees, with the head directed away from the trunk ; 

 but in the younger stages they keep together in small groups." 

 (Uhler.j 



Family VII. Cic\mi; 



(Cicadas.) 



The lar uul the well-known songs of the more common 



species of this family render them familiar objects. It is only 

 necessary to refer to the Periodical Cicada (or the 1 7-year locust, as 



* Cicadidae, Cicada: Cic&da, Latin name of these i 



