1 10 [Mnich, 



Ceratopsijlla pentactemis id., Nov. Zool., V, p. 542 (1898) (partim). 



Ceratopsylhis peyitactenus Verrall, List Brit. Dipt., I, ed. 2, p. 7 (1901) 

 (partim). 



Nycteridopsylla longiceps Rothschild, Entora., XLI, p. 281, pi. 8 (1908) 

 (Henley; Tring; etc.): id., I.e., XLII, p. 28, no. 3 (1909); Russell, The Flea, 

 p. 112 (1913). 



Hah. : Great Britain. Hosts : Plecotus auritus and Pipistrellus pipistrellus. 



EXPLANATION OF PLATES. 



Plate VII. 



Page. 



Pig. 1. Xenopsylla cheopis 9 ; mesop. = mesopleurum 54 



„ 2. Pulex irritans $ ; sti = stigma 55 



„ 3. Archaeopsylla erinacei $ 55 



„ 4. Ctenocephalus canis 9 56 



„ 5. Ctenocephalus felis $ 56 



„ 6. Spilopsyllus cuniculi ? 57 



„ 7. Ornithopsylla laetitiae $ 58 



,, 8. Orriithopsylla laetitiae, organs oi $ 58 



„ 9. Xenopsylla cheopis, receptaciilum seminis 54 



„ 10. Ctenocephalus canis, orga.ns oi ^ ; M ^; manubrium 56 



„ 11. Ctenocephalus felis, organs of ^ 56 



„ 12. Xenopsylla cheopis, organs oi g- IX st. ^= ninth sternite 54 



Plate VIII. 



Fig. 13. Ceratophyllus gallinulae $ 62 



„ 14. Ceratophyllus gallinulae ^ , seventh sternite ; r.s.=receptaculum 



seminis 62 



„ 15. Ceratophyllus styx, organs of $ ; M = manubrium, CI = clasper, 



F = finger, P = Process of Clasper 63 



,, 16. Ceratophyllus styx $ , seventh abdominal sternite 63 



„ 17. Ceratophyllus rothschildi, organs o{ <? 64 



„ 18. Ceratophyllus rothschildi $, seventh abdominal sternite 64 



„ 19. Ceratophyllus hirundinis, organs of <J 65 



„ 20. Ceratophyllus hirundinis $, seventh abdominal sternite 65 



„ 21. Ceratophyllus rusticus, organs oi ^ 66 



„ 22. Ceratophyllus rusticus, seventh abdominal sternite, and eighth 



tergite and sternite 66 



Plate IX. 



Fig. 23. Ceratophyllus farreni, organs of ^ ; CI. = clasper, P = process 

 of clasper, F = finger (i.e., movable process). Par. = end- 

 pieces of parameres of penis, VIII. t. and VIII. st.=eighth 



tergite and sternite 67 



„ 24. Ceratophyllus farreni. meso- and metanotum 67 



