rminal part of 



PLATE LV 



Figure 1. The meso- and meta-thorax of Pulex irritans. X 66. 



Figure 2. The same of Xenopsylla cheopis. X 66. 



Figure 3. The ninth tergite and sternite of Xenopsylla cheopis^ 



$ , after Jordan and Rothschild. 



Figure 4. The spermatheca of Pulex irritans. x 125. 

 Figure 5. The same of Xenopsylla cheopis. x 125. 

 Figure 6. The terminal segments of Pulex irritans, dissected 



out, 3 . x 120. 

 Figure 7. The terminal segments of Xenopsylla cheopis, ? , after 



Jordan and Rothschild. 



