LIST OF ILLUSTRATIONS. 



Text-Figures. 



PAGE 



Fig. 1. — Otodectes cynotis, vav. felis, showing distribution of 

 tracheal tubes, (a) Portion of tube greatly magnifie d 



to show striation . . 15 



2. — (a) Distal end of leg of Ohorioptes or Otodectes . IC 



(b) Distal end of leg of Psoroxites . . 16 



3. — Posterior abdominal lobes of males of Psoroptes . . 17 

 4. — Ventral view of male nymph of Psoroptes communis, var. 



ovis. (a) Posterior end of female (pubescent) nymph 18 



5. — Dorsal view of male of Psoroptes cotnmunis, var. ovis . 19 

 6. — Ventral view of male of Ohorioptes [ = /S'j/m6io<e«],from foot 



of sheep ......... 22 



7. — Dorsal view of male of Otodectes cynotis, var. canis . . 24 



8. — Sarcoptes scabiei, var. equi, ?. Dorsal view . 26 



9. — „ „ „ 6- Ventral view. . . 27 



10. — Notoedrus cati, var. cuniculi. Dorsal view of female 28 



11. — „ „ ,, . Ventral view of male . 29 



12. — Notoedrus muris. Dorsal view of female . 30 



13. — Cnemidocoptes mutans. Dorsal view of female . 31 



14. — ,, ,, Ventral view of male . 32 



15. — Cnemidocoptes laevis, var. gallinae. Dorsal view of female 33 



16. — Cytoleichus nudus. Ventral view of female ... 34 



17. — Laminosioptes cysticola. Ventral view of female . . 35 



18. — JHypopisl nymph {" Hypodectes ") oi FalcuUfer rostratus . 36 



19. — Megninia sp. Ventral view of male . . 37 



20. — Megninia columhae. Ventral view of male . . 38 

 21. — ,, „ (a) Tarsus of fourth leg of male. 



(b) Tarsus of third leg of male . 39 



22. — (a) Posterior end of body of male of Megninia velata . 40 

 (b) „ ,, ,, ,, cubitalis, 



var. ginglymura . . . . . 40 



23. — Pterolichus obtusus. Female from above . 41 

 24. — „ „ Male from below . . .42 

 25. — Posterior abdominal lobes of male of (a) Pterolichus 



bicaudatus ; (b) of P. sculpturatus ... 43 



26. — (a) Posterior end of nymph of Pterolichus bicaudatus 44 



(b) „ J, ,, sculpturatus . 44 

 27. — Pterolichus sp. Female from below, (a) Tarsus of second 



leg of same, (b) Denticle on first tarsus . . 45 



28. — Pterolichus sp. Male from above . . 46 



29. — „ ,, Cast skin of nymph . 47 



30. — Freyana chanayi, 6 ■ Dorsal view . . 48 



