Tech. Series 21, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate II. 



North American Thysanoptera. 



Fig. H.—OrothripH Mli)(;ii: ItiKlit antenna. Fig. 'J.—Orot/in'iix ktlloniii/oyi'iiiitii: RiRbt antenna. 

 Fig. U).~ Tin- ipn wa!jiiii.-<: IIea<i anfl prothorax of female. Fig. W.— Tfiri'i^s liidfiinis: Right 

 fore wing. Fig. 12.— Euthripfi citrl: Head and protlioraxof female. Fig. K.—Kiithripy cifri: 

 Tip of abdomen of female. Fig. U.—EidhripH citri: Right antenna of female. Fig. l.'i.— 

 Eidhrips citri: Right fore wing. (Original.) 



