General
The dog flea is small 2-2.5mm long for the male and 2-3.5 for the female. 
The most distinctive features of the dog flea are the large jumping legs and the row of black non-sensory spines on the front margin of the head and on the rear of the first thoracic segment. These bristles or combs are a diagnostic feature of the dog flea.

Reproduction
After mating the female flea lays several hundred eggs in batches after each blood meal, in the dog’s hair, bedding resting site and in areas where the dog is to be found.