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



Plate I. 



North American Thysanoptera. 



Fig. 1. — Eriithrothrips arizomr: Head and thorax iil" female, dorsal vii'W. Fif,'. '1. — Enjthro- 

 tliripH tirizDiiw: Tip of abdomen of female, dorsal view. Fig. 3. — Eri/tlirot/irijiK an'zoiiu:- 

 'lip of abdomen of male, dorsal view. Fig. 4. — Kriillirothripn arizoiur: Right l'.>re wing. 

 Fig. 5. — Eriitbrtithrips arizomv: Maxillary palpus. Fig. 6. — Eryth roth rips arizonas: Left 

 antenna. Fig. 7. — Eri/llirollirips iirizotnr: Larva. (Original.) 



