60 



R. NEWST15AD— THE I'APATACI FLIES (PHLEBOTOMDS) 



deeply and broadly channelled but does not appear to possess interlocking teeth 

 or other structures. The hypopharynx (fig. 3, liy) is similar in width and 

 general form to the labrum, but tapers off much more gradually towards the end 

 and the marginal spinose teeth are much shorter and placed so closely together 

 as to present a finely serrated edge : its upper surface is distinctly and broadly 

 concave or trough-like and the salivary duct which is small, occupies a central 



Fig. 3. — Mouth- parts of Plilehotomun jKipatas'ii, ? ; Z6, labium ; Zir, labrum-epipharynx ; 

 hy, hypopharynx ; ind, mandible ; in.v, maxilla. The uppermost figure represents 

 the labrum and hypopharynx of the male, as seen in profile. 



position. Tlie mandibles (fig. 3, ind) are broad and blade-like, and have the outer 

 edges faiBtly serrated, the serrations being rather widely separated. When at 

 rest they lie, apparently, superimposed one over the other. Tlie maxillae 

 (fig. 3, mai) are much narrower than the mandibles, curved transversely, and 

 attached to a broad trough-shaped sclerite, not to a long slender stalk as Grassi 

 has shown. One edge is provided with five relatively large and widely separated 

 teeth ; the opposite edge with smaller ones set closely together. 



