xu 



ILLUSTRATIONS. 



23. Small Red Sclerostome {S. ruhmm) from Horse 



24. Gape Worm (Syngamua trachealis) 



25. Trichina spiraZis . 



26. Eelworms {AnguiUididoe) 



27. Ascarida; . 



28. Oxyures of Horse (Cwvula) 



29. Oxyures of Horse (Mastigodes) 



30. The Horse-Leech (Hamopu smiguisuga) 



31. Structure of an Arthropod (Peryplaneta americana 



32. Head and Lower Lip of Cockroach 



33. Structure of Insect Leg . 



34. Digestive Organs of the Cockroach 



35. Trachea and side-view of part of Abdomen 



36. Nervous System . 



37. Wood-lice {ArmadiUo indga/ris, PorceUio scdber, and antenna of 



Onucus, &c.) 



38. Millipedes {lulus pvlcheUus and /, Londinenns) 



39. House Spider {Tegenaria civUis) . 



40. Orb-weaving Spider, &c. . 



41. Harvest Bug {Tromhidium holosericewn) 



42. Bed Spider (Tetrwnychus tela/nmi) 



43. Harvest Bug (Leptus autummaZis) 



44. Ked Hen Mite {Dermanysms avium,) and 



45. Bed Mange 



46. Demodectic Scabies (section of skin) 



47. Beetle Mite {Oribata orhicularis) , 



48. Linguatulida; 



49. A Hexapod {Tipula oleracea) 



50. Mouth parts of Insects . 



51. Larvae of Insects . 



52. Pupse of Insects . 



53. Pupa of Tipvla oleracea . 



54. Alimentary Canal of Larva {Tipula paludosa) 



55. Lady-birds {CoccinellidcB) 



56. Mustard-beetle (Phmdon hetvlos) 



57. Apple-Blossom Weevil (AinthononvM pomorum) 



58. Apple - Blossoms damaged by Apple Weevil (Aiahmomus 



pomorum) ...... 



137 



