138 Fleas of Eastern United States 



PLATE V 



Figure 



16. Xenopsylla cheopis (Rothschild), male genitalia. 



17. Pulex irritans Linnaeus, male genitalia. 



18. Xenopsylla cheopis (Rothschild), receptaculum seminis. 



19. Pulex irritans Linnaeus, receptaculum seminis. 



20. Xenopsylla cheopis (Rothschild), head of male. 



21. Pulex irritans Linnaeus, head of female. 



