LIST OF ILLUSTRATIONS 



PLATE 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



LIV. Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 8. 



Fig. 9. 



Fig. 10. 



Fig. 11. 



Fig. 12. 



Fig. 13. 



LV. Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



LVI. Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



LVII. Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 8. 



Fig. 9. 



Fig. 10. 



FACING PAGE 



Claw of same. 



The ninth tergite of male of same. 



Anal stylet of female of same. 



The antenna of same ... ... 437 



Reference letters, Plates LI 1 1 to LVI 1 1 ... 437 



Head of Echidnophaga gallinaceus. 



Hind coxa of Pulex irritans. 



End of manubrium of Ctenocephalus 



cants. 



Maxilla of Ctenocephalus felts. 

 Head of female Ctenocephalus felis. 

 The rostrum of same. 

 Distal end of mandible of same. 

 Mandible of same. 



Distal end of labrum-epipharynx of same. 

 Sense hair from antenna of Ceratophyllus 



fasciatus. 

 The labrum-epipharynx of Ctenocephalus 



felis. 



Antenna of Ceratophyllus fasciatus. 

 Head of Ctenocephalus cants, female ... 440 



Meso-and meta-thorax of Pulex irritans. 



The same of Xenopsylla cheopis. 



The ninth tergite and sternite of same. 



The spermatheca of Pulex irritans. 



The same of Xenopsylla cheopis. 



The terminal abdominal segments of Pulex 



irritans, male. 

 The terminal abdominal segments of 



Xenopsylla cheopis, female ... 445 



Ceratophyllus fasciatus, female. 



Head of Ctenophthalmus agyrtes. 



Echidnophaga gallinaceus, female. 



Dermatophyllus penetrans, female. 



Head of Lycopsylla novus. 



Xenopsylla cheopis, female ... 450 



Larva of Ctenocephalus felis. 

 Terminal segments of same. 

 Anal process of same. 

 Pupa of same. 



Alimentary tract of larva of same. 

 Salivary glands of the larva. 

 Cells on the wall of the hind-gut of larva. 

 Antenna of larva of same. 

 Mandible of larva of Echidnophaga galli- 

 naceus. 

 Terminal segments of larva of same. 



