1922] Kershaw and Miiir: Genitalia of Homoptera 211 



EXPLANATION OF PLATE XI IL 



Philcenus leucophthalmus. 



Fig. 1. 9 . Ventral view of VIII-X stemites of nymph, last instar. 



Fig. 2. 9 . Lateral view of apical abdominal segments of adult. 



Fig. 3. 9 . Anterior processes of ovipositor. 



Fig. 4. 9 . Median and posterior processes of ovipositor. 



Fig. 5. cf. Gonapophyses at an early stage. 



Fig. 6. cf . Gonapophyses penultimate nymphal stage. 



Fig. 7. cf. Ventral view of VIII-X stemites of nymph, last instar. 



Fig. 8. o^. Lateral view of apical segments of adult. 



Fig. 9. cf. Ventral view of pygofer. 



Fig. 10. 9 . Aedeagus and one genital style of immature adult. 



Fig. 11. cf . Median gonapophyses, last nymphal stage, showing the 

 immature adult stage within it. 



Perkinsiella saccharicida. 



Fig. 12. 9 . Ventral view of last abdominal segment of nymph, last instar. 



Fig. 13. 9 . Gonapophyses of same, enlarged. 



Fig. 14. cf . Ventral view of last abdominal segments of nymph, last instar. 



Fig. 15. cT. Aedeagus of immature adult. 



Fig. 16. &. Anterior gonapophyses "of immature adult. 



Fig. 17. cf . Posterior gonapophyses of immature adult. 



Fig. I'S. cf . Full view of pygofer of immature adult. 



Fig. 19. cf . Lateral view of anal segment aedeagus, anterior and posterior 



gonapophyses of immature adult just before final larval 



moult. 



Fig. 20. PissonotHs frontalis. Full view of cf pygofer. 



LETTERING OF FIGURES. 



a. 5eg.= Anal segment. g3 = posterior gonapophyses = gs or 



an = Anus. genital styles. 



05 = Anal style. nc = new cuticle. 



6/> = basal plate. oc = old cuticle. 



(/jfl = diaphragm. /) = penis. 



e;(i = ejaculatory duct. pa — periandrium. 



g/jr = gonopore. ^g = pygofer. 



gM = apodeme''of genital style. />//= penis hooks. 



gi= anterior gonapophyses = g^ or S 5/g = 8th stigma. 



genital plates. 8, 9, 10, ll = tergites. 



g^ = median gonapophyses. VIII, IX, X = stemites. 



