394 ANOPLURA. 



CASE on account of his being black instead of white, neither should we 

 believe that the Pediculus of the Negro is different from that of 

 the European because it is black instead of white. If we cannot 

 believe that the Australian is different from the Esquimaux 

 because he has proportionally a much longer leg, neither can we 

 believe that the Australian Pediculus is different from the Slave 

 Lake Pediculus, because it has a longer and straighter penulti- 

 mate joint to its tarsus. If the curved tibia of the African does 

 not constitute him a different species from races with straight 

 tibias, neither should the greater or less curvature of the joints 

 of the tarsi in the Pediculi be considered to form specific dis- 

 tinctions in them. It so happens, that not only are the differ- 

 ences, both between man and man, and Pediculus and Pediculus^ 

 very similar in degree, but they are also differences of the same 

 kind. They are differences in colour and proportion of the very 

 same, or, at all events, analogous parts in both. To attempt to 

 draw any deductions from these differences in the Pediculi, would^ 

 therefore, be something like begging the whole question. 



Nos. Pediculus vestimenti (body louse).— 3, Specimens from Britain; 4. En- 

 ^~ • larged figure of ditto ; 5. Specimen on glass slide ; 6. Enlarged figure 



of anterior claw. 



I ( ; ' S 



I 



Pediculus vestimenti. li to i|] line in lenfi:tU. Sucker of ditto. 



This is distinct from the head-louse, but it is not easy to give 



