List of Ilhistrattons. 



PAGE 



50 

 51 



52 



53 

 54 



Fig 31. — Dermocjlyphus eloiigatus. (a) ilale ; (b) Female ^9 

 V',, 32. — EpidcniiO])t€s bilobatus, 5 . From below 

 „ 33.^ ., ,. c5 



„ 34. — Listrophorid mite, sliowing distribution of tracheal tubes 



„ 35. — GUrodiscoides caviae. Ventral view of male . • 52 



„ 36.— Hypopial or travelling nymphs of Tyroglyphidae . • o3 

 ., 37. — Tyroglyphus lottgior, var. castellanii, 6. Dorsal and 



ventral aspects 

 ,, 38. — Olycyphagus domesticux ■ ■ ■ • 



„ 39.~Cheyletid mites, (a) Psorergates musculi. Dorsal view 



of male, (b) Myobia sp. Dorsal view of male . 55 



,^ 40. — Cheyletiella parasitivorax. Dorsal view of female • 50 

 ,, 41. — (a) Syringophilus bipectinatus. (b) S. columbae. Dorsal 



aspect of females . . . • • 5/ 



„ 42. — (a) Tarsus of leg of SyringojoMlus bipectinatus 58 



(b) ,, „ ., columbae . • 58 

 ., 43. — Tydeus molestus, ? . From below, (a) Leg. (b) Palp, 



much enlarged . . .58 



V ,, 44. — Leptus {Trombicula '?) similis - 59 

 ,, 45. — tSchongastia americaiin 60 



46. — Capitulum of Demodex foUiculorutn 61 



,, 47. — Dorsal spinule on capitulum (palp) of Demodex spp. 61 



V , 48. — Demodex canis, ?. Ventral view; and capitulum from 



above . . .62 



,, 4 9 — Daaodex equi. Male and female. Also capitulum from 



above ..... 62 



,, 50. — fa) Doiwdex canis, var. avis. ?. From below . 63 

 (b) Capitulum of same, from above, (c and d) Demodex 



phylloides. ? . Dorsal and ventral aspects (e) D. cati, 



i , from above . . .63 



51. — Demodex bovis. Ventral view of female, and dorsal and 



lateral views of male . 64 

 ,, 52. — Stages in life cycle of Demodex . . .65 

 ., 53. — (a) Penis of Demodex cati. (b) Early larva of D. bovis. 



(c, d, and e) Penis of D. bovis ... 66 



.. 54. — Anterior end of Dermanyssus, showing chelicerae in situ . 66 



,, 55. — Dermanyssus gaUinac, ?. Dorsal view . 67 



,, 56. — ,, ,, 9 . Ventral view . 68 



" 57.— „ ,, <5 ,, „ . 69 



,, 58. — ,, ,, Second nymph. Ventral view 70 



,, 59. — ,, ,, First nymph. Dorsal view 71 



,, 60. ,, ,, Ventral view 72 



.. 61. — ,, ,, Larva. Dorsal view . 73 



,, 62. — Dermanyssus muris, ? . Dorsal and ventral aspects 74 



" 63. — ,, sa7iguiricus. ? . Dorsal and ventral aspects 75 



,, 64. — ,, aegyptius, ? ,, ^^ _. 7q 



,, 65. — Lipoiiyssus bacoti, 9 . ,, 77 



,, 66. — ,, bursa, 9 . Dorsal aspect . 78 



,. 67. — (a) Sternal plate of Liponyssus bursa, 9 . 79 



(ti) !! ,, !. ., sylviarum. 9 79 



,, 68. — (a) Posterior end of dorsal shield of Liponyssus bursa, 9 . 80 



("^ " " >! " !, sylviarum, 9 80 



