336 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Although this species does not appear to have been taken 

 apart from its host, yet it looks quite capable of leading a 

 free existence. 



Explanation of the Plate. 



Leptopsyllus herdmani, n. sp. 



Fig. 1. Female seen from above. X 106. 



Fig. 2. Antennule of female. X 500. 



Fig. 3. Antenna. X 500. 



Fig. 4. Posterior foot-jaw. X 500. 



Fig. 5. First pair of swimming feet. X 500. 



Fig. 6. Second ,, ,, X 500. 



Fig. 7. Fourth „ „ X 500. 



Fig. 8. Fifth „ „ X 500. 



Fig. 9. Last two segments of abdomen and caudal stylets. 



X 260. 



