Il8 ECONOMIC ENTOMOLOGY 



often 2 inches long, each row containing about 30 eggs; hatch in 

 May and June. 



Nymphs. — Feed on plant-Hce and other insects; full grown late 

 July and August. 



Control. — Prune out infested twigs and burn them. 



Other species of (Ecanthus deposit eggs in galls on willows, and in 

 the stems of Helianthus, Solidago, etc. 



Fig. 74. — CEcanthus niveus ovipositing. {After Parrott.) 

 ORDER THYSANOPTERA (THRIPS) 



(Consult Tech. Ser. No. 12. Pt. Ill, and No. 21. Bur. Ent., U. S. Dep. of Ag.) 



A. Female with a saw-like ovipositor, last segment of abdomen of female 

 conical, that of male broadly rounded; wings usually present, the fore pair 

 the stronger. 

 B. Ovipositor curved upward; antennas 9-jointed; fore wings broad and 

 rounded. MololhripidcB. — ^Genus JEolothrlps. 

 BB. Ovipositor curved downward; antennae 7- to lo-jointodj wings usually 

 narrow and pointed. — ThrlpidcB. Genera: Thrips, Euthrips, Helio- 

 thrips, Anaphothrips. 

 AA. Female without a modified ovipositor, last segment of abdomen tubular 

 in both sexes; wings often absent, but when present similar in structure.^ 

 Phloeothriplda. Genera: Phlxothrips, Trichothrips, Cryplothrips. 



