ORTHORRHAPHA 



Nematocera 



Pulicidae 



\ 



*tm 



Fig. I. Piih-x irn/ans Vmn. $ 4 mm. The 

 human flea, prevalent everywhere. The 

 larvae live in dust and dirt, in crevices of 

 floors, etc. 



Fig. 2. Hystrichopsylhi talpac Ctirtis. 

 6 mm. The common mole flea. 





4 



Fig. 3. Trichopsylla styx Rothsch. $ and J 

 3 mm., from house-martin's nest, Grant- 

 chester, Cambridge. 



Fig. 4. Typhlopsylla gracilis Taschb. 

 j 2 mm. and ? 2'2 mm., from a 

 mole's nest, Grantchester. 



