294 



Account of the Pulex penetrans L. 



[We have asked of Mr. Westwood the favour of his sup- 

 plying figures, and what information he can, in elucidation of 

 the personal characteristics of the chegoe, or chigo. The fol- 

 lowing article, translated by Mr. Shuckard from a recent 

 German work, with the accompanying figures, is the result of 

 our application, from which it will be seen that several inter- 

 esting facts respecting the real nature of the transformations 

 of the chegoe, still remain in obscurity.] 



Art. III. An Account of the Villex penetrans L., translated from 

 Pohl and Kollars Work, " Brasiliens vorzilglich I'dstige Insec- 

 ten;" that is, On the Noxious Insects of Brazil; by W. E. 

 Shuckard, Esq. 



PU V LEX PENETRANS Lin. 



The Sand Flea. In Portuguese, Bicho ; and called Tunga by the Brazilians. 

 Pulex fusco-rufescens ; rostro tenuissimo dimidii corporis longitudine. 



We may reckon amongst the most troublesome and dan- 

 gerous insects of Brazil a close relation of our flea, but which 



40 



isf// 



"* rt 



A dog's amputated;foot, with the nests of the sand flea (Pulex penetrans L.) in several spots. 



a a a, Form of this nest, immediately after its insertion on the first day. 



b b, Cavities which remain in the parts, after the balls formed by the expansion of the body of 



the sand flea have been extracted, on the second or third day after its insertion. 

 c c, An extracted peeled ball, both of the natural size and magnified, with the anal aperture of 



the flea, seen from behind. 

 d d, A similar ball seen from before, both of the natural size and magnified. 

 /, One of these balls opened from the anus, freed from the cellular membrane, and enlarged, 



whereby the conglomeration of eggs is seen 



