CONTENTS. 



XXI 



(o) 



KO. 



23. Pediculus capitis, Andian variety, specimen of insect on a glass 



24. Do. , of anterior claw, much magnified 



25. Do., vignette sketch, South American Indian . 



26. Pediculus capitis, Fuegian variety, specimens of insect (o) 



27. Do., sketch of do 



28. Do., specimen of insect on a glass slide 



29. Do., sketch of anterior claw, much magnified . 



30. Do., vignette sketch, Fuegians .... 



31. Pediculus capitis. West African variety, specimens of insect 



32. Do., sketch of do 



33. Do. , specimen of insect on a glass slide 



34. Do., of anterior claw, much magnified 



35. Do., vignette sketch, West African Negro . 



36. Pediculus capitis, Mozambique variety, specimen of insect 



37. Do. , sketch of do 



38. Do., specimen of insect on a glass slide 



39. Do., of anterior claw, much magnified 



40. Do., vignette sketch, Mozambique Africander. . 



41. Pediculus capitis, specimens of insect, Hindoo variety 



42. Do., sketch of do 



43. Do., specimen of insect on a glass slide 



44. Do., of anterior claw, much magnified 



45. Do., vignette sketch, Hindoo Brahmin 



46. Pediculus capitis, Australian variety, specimens of insect . 



47. Do., sketch of do 



48. Do., specimen of insect on a glass slide 



49. Do. , of anterior claw, much magnified 



50. Do., vignette sketch, Australian .... 



51. Vignette sketch, Causes of vermin: Dirt and over crowding 



52. Do., Causes of vermin : Misery .... 



53. Do., Causes of vermin : Disease 



54. Do., Remedies, Cleanliness, &c. .... 



SEE PAGE 



slide. 400 



CASE XXI. 

 THYSANURA.— (Spring-tails). 



COLLEMBOLA. 



1 . Smynthurus fuscus, sketch of insect 406 



2. Papirius omatus, do. 408 



3. Do. fuscus, do. ......,, 



4. Orchesella cincta, specimens of insect ,, 



5. Do. sketch of do ,, 



6. Do. do. 



