Fig. 



Fig. 



Fig. 



Fig. 



PLATE 4a. 



1 — Boophilus Annulatus. a-Ventral view. 



b-Dorsal view. 

 2 — Amblyomma Americanum, a-Dorsal 



view, b-Ventral view. 

 3— Ornithodoros Megnini, a-Vcntral view, 



b-Dorsal view. 



PLATE 4b. 



4 — Argas Miniatus, a-Dorsal view, b-A^ei.- 



tral view. 

 5 — Dermaeentor Electus. 

 6 — Boophilus Annulatus, male. 

 7 — Ornithodoros Megnini, Section of skin 



.showing spines. 

 8 — Leg, Boophilus Annulatus. 



PLATE 5. 



1 — Stigmen, Boophilus Annulatus larvat 



Drawing from moult. 

 2 — Leg, Boophilus Australis, Side view. 

 3 — Leg, Ornithodoros Megnini. 

 4 — Stigmen, Boophilus Annulatus. 

 5 — Stigmen, Dermaeentor Keticulatus. 

 6_Capitulum, Boophilus Annulatus. 



PLATE 6. 



1 — Amblyomma Americanum, ovipositing. 

 2 — Boophilus Annulatus, ovipositing. 

 3 — Boophilus Annulatus on skin of cow. 

 4 — Sarcoptic scabies, cat. 



PLATE 7. 



1 — Spiroptera Strongylina, a-male, b-fe 

 male. 



2 — Spiroptera Strongylina, cephalic ex- 

 tremity. 



3 — Spiroptera Strongylina, caudal extrem- 

 ity of male. 



4 — Spiroptera Strongylina, caudal extrem 

 ity of female. 



5 — Ascaris Mystax. 



6 — Oxyuris mastigodes, female. 



7 — Ascaris Suis, front view of cephali' 

 extremity. 



xl 



Inserted 



between pages 



72 and 73 



Inserted 



between pages 



74 and 75 



Inserted 



between pages 



80 and 81 



Inserted 



between pages 



90 and 91 



