PLATE XXXII. 



Fig. 1. — Frons and mouth parts, labium excepted, removed from head. 

 (Photo.) 



Figs. 2, 3 and 4, — Wings of male. (Photos.) 



Figs. 5, 6 and 7. — Wings of female. (Photos.) 



Fig. 8. — Tracheation of nymphal wing pad of P. celtidis-gemma, fore 

 wing. (Photo.) C, costa; Sc, subcosta; R, radius; M, M, media; 

 Cu, Cu, cubitus. 



Fig. 9. — Tracheation of wing of recently emerged adult of P. celtidis- 

 mammse, fore wing. (Photo.) C, costa; Sc + R, radius plus sub- 

 costa; R, radius; M, media; Cu, cubitus. 



Fig. 10. — Branching of media and cubitus from radius plus subcosta in 

 fore wing of recently emerged P. celtidis-mammse : Sc + Rr radius 

 plus subcosta; M, media; Cii, cubitus. 



Fig. 11. — Branching of subcosta and radius in fore wing of recently 

 emerged P. celtidis-mammse: Sc, subcosta; R, radius; C, costa. 



