LIST OF ILLUSTRATIONS. 



TEXT-FIGURES. 



FIG. 1. Otodectes cynotis, var. felis, ' showing distribution of 



tracheal tubes, (a) Portion of tube greatly magnified 



to show striation . . . . . . .15 



,, 2. (a) Distal end of leg of Chorioptes or Otodectes . . 16 



(b) Distal end of leg of Psoroptes ..... 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 communis, var. ovis . 19 

 6. Ventral view of male of Chorioptes [ = Symbiotes], from foot 



of sheep . . . . . . . . 22 



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



,, 8. Sarcoptes scabiei, var. equi, 9 . Dorsal view ... 26 



9. ,, ,, (5. 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. Hypopial nymph (" Hypodectes ") of Falculifer rostratus . 36 



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



,, 20. Megninia columbae. 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) ,, ,, ,, 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, <5 . Dorsal view . . . . 48 



