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Roosevelt Wild Life Bulletin 



Fig. 13. Activities of Macrobdella decora. A : resting and swimming positions 

 (note that the swimming leech is turned on edge). B: attacking and feed- 

 ing upon a frog u-hich has nearly succumbed to the loss of blood. C : feeding 

 upon frogs' eggs ; two leeches have penetrated the mass and are rapidly 

 cutting the eggs from their envelopes and swallowing them ; of the remaining 

 two, one is swimming, the other exploring while the caudal sucker remains 

 attached. D : a pair of leeches in copulation ; this figure represents Philo- 

 hdella. a. southern leech related to Macrobdella. A, B and C are reduced- 

 D is nearly natural size. 



