S. C. Porter 



a. Common house-martin fiea, Cerato- 

 phyllus hirundinis, male at rest ( x i6) 



S. C. Porter 

 b. Common house-martin flea, C. hirun- 

 dinis, about to feed ( x i6) 



Arthur L. E. Barron 

 c. Terminal portion of leg of shearwater flea, Ornithopsylla laetitiae ( x 205) 

 Plate XXXIII 



