Ill 



Page. 

 Ceratophyllus farreni ? , seventh abdominal sternite and rocopta- 



cultira seminis 67 



Ceratophyllus garei, organs of cJ 67 



Ceratophyllus garei, meso- and metanotiim 67 



Ceratophyllus garei ? , seventh abdominal stei-nite and recepta- 



cuhxm seminis 67 



Ceratophyllu,s columhae, org'ans of <? 68 



Ceratophyllus columbae $ , seventh abdominal sternite and re- 



ceptaculum seminis 68 



Ceratophyllus vagahunda, organs of ^ 69 



Ceratophyllus vagahunda ? , seventh sternite, eighth tergite, 



and receptaculuiu seminis 69 



Ceratophyllus horealis, organs of c? 70 



Ceratophyllus horealis 9 , ninth abdominal sternite and recepta- 



cuhun seminis 70 



Plate X. 



Fig. 3.5. Ceratophyllus gallinae, organs of (J 71 



„ 36. Ceratophyllus gallinae $ , seventh sternite (VII. st.), eighth ter- 

 gite (VIII. t.), pygidium (Py.), and receptaciilum seminis 



(r.s.) 71 



„ 37. Ceratophyllus fringillae, organs of J 72 



„ 38. Ceratophyllus fringillae '?, seventh abdominal sternite and eighth 



tergite 72 



„ 39. Apex of labial palpus of Pulex irritans 55 



„ 40. The same of Ceratophyllus fasciatus 73 



„ 41. 'Sitjl^t {-= cevcus) oi Ceratophyllus fasciatus ? 73 



„ 42. The same of Ceratophyllus sciurorum ^ 74 



„ 43. Ceratophijllus fasciatus, ov^a.ns oi <? 73 



„ 44. Ceratophyllus fasciatus $ , seventh abdominal sternite and re- 



ceptacultim seminis 73 



„ 45. Cerato2)hyllus londiriiensis, organs oi S ''3 



„ 46. Ceratophyllus loridiniensis, seventh abdominal stei-nite and re- 



ceptaciiliun seminis 73 



Plate XI. 



Fig. 47. Ceratophyllus sciurorum, organs of g ; VIII. st.=eighth sternite 74 

 „ 48. Ceratophyllus sciuror^im $ , seventh abdominal sternite and re- 



ceptaculiun seminis 74 



„ 49. Ceratophyllis penicilliger, organs oi $ 74 



„ 50. Ceratophyllus penicilliger $ , seventh abdominal sternite and re- 



ceptaculiuu seminis 74 



„ 51. Ceratophyllis wallceri, organs of $ 75 



„ 52. Ceratophyllus walkeri $ , seventh sternite and receptaculvmi 



seminis 75 



„ 53. Ceratophyllus mustelae, organs of ^ 76 



„ 54, Ceratophyllus mustelae $,... seventh sternite and receptaculum 



seminis 76 



„ 55. Ceratophyllus melis, organs of $ 76 



„ 56. Ceratophyllus melis $ seventh sternite 76 



