CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 1 57 



occurs mainly in the South. Over twenty brooih have been recog- 

 nized and delimited. 



Control. — Prune off affected twigs in July and burn before the hatch- 

 ing of the eggs; allow hogs the run of infested land during April and 

 May; avoid pruning the orchard 

 the year before a cicada year. 



N atural Enemies. — A digger 

 wasp {Megastiziis speciosus), egg 

 parasites (cecidomyiid and chal- 

 cid); mites; the English sparrow, 

 catbird, robin, etc. 



The Dog-day Harvest-fly 

 {Cicada tibicen Linn.). — Often oc- 

 curs but is not of much import- 

 ance economically. It is black 

 and green, and white powdered 

 underneath. 



Membracid^ (Tree-hoppers) 



Buffalo Tree-hopper {Ceresa 

 hiibalus Fab.). — (Consult Circ. 23, 

 Div. Ent., U. S. Dept. Agric.) 

 This bug is a common pest of or- 

 chards and shade trees feeding on 

 the sap of apple, maple, etc. It 

 injures the trees by making longi- 

 tudinal incisions in the bark, which 

 become points of weakness (Fig. 

 100). 



Adult. — A grass-green bug, % 

 inch long, with the pronotum 

 greatly enlarged, and expanding 

 laterally into two horns and pos- 

 teriorly into a long point. July- 

 September. 



Eggs. — Dirty-whitish, cylindrical, slightly curved, tapering toward 

 outer end; 3'! 6 i^^ch long. Laid in the bark in batches of 6-12 in two 



Fig. 100. — Twigs showing egg punc- 

 tures of the Buffalo tree-hopper. 



