108 



ORDER HEMIPTERA 



case may not be very apparent. The common species 

 affect willows. 



Idiocerus alternatus lays eggs in the bark and passes 

 throngh two generations each year. 



Fig. G4.— Glassy- winged sharpshooter: a, adult?, seen from above; b, 

 side view; c, venation of forewing, enlarged; d, antenna?; e, section of 

 hind tibia; /, 9 genitaha, more enlarged; g, serration of ovipositor, still 

 more enlarged. (From Howard, Bur. Ent., U. S. Dept. Ag.) 



Clover Leafhopper, — Another form of considerable eco- 

 nomic im])ortance, the clover leafhopper, is a very common 

 pest of clover and alfalfa and has been noted as troublesome 

 in sugar-beet fields. 



Family Tettigoniellidse. — The family TettigoniellidoB in- 

 cludes an enormous number of species occurring in the 

 tropics and a considerable number of common forms through- 



