- 77 XENOPSYLLA. 



152. Adult. Draw a lateral view under the low power showing : head with simple 

 eyes, antennae lying in their grooves, maxillae, four-jointed maxillary palps, labial palps 

 and piercing apparatus ; pro-,meso- and meta-thorax, with their respective sternites to 

 which are attached the legs ; thoracic spiracles ; abdomen with spiracles, pygidium 

 and, inside the body, recurved chitinous hairs of proventriculus ; and in male, claspers 

 and coiled spring-like organ ; in female, receptaculum seminis. 



152 A. Mouthparts. Examine the demonstration slide of the head of a flea showing: 

 pair of pointed mandibles with saw-like edges; single epipharynx; pair of first maxillae 

 with palps ; labium with pair of labial palps. 



