ORTHORRHAPHA 



Nkmatocera 



Pulicidae 



Fi^-. I. PhIlw irri/aiis \.\n\-\. ^ 4 mm. The 

 human flea, prevalent everywhere. The 

 larvae live in dust and dirt, in crevices of 

 floors, etc. 



Fig". 2. Hystiiiltopsylla latpae Curtis. 

 6 mm. The common mole flea. 



Fig. 3. Trichopsylla styx Rothsch. $ and V 

 3 mm., from house-martin's nest, {;rant- 

 chester, Cambridge. 



Fig. 4. Typhlopsylla gracilis Taschb. 

 (j 2 mm. and $ 2'2 mm., from a 

 mole's nest, Grantchester. 



