parasites in Nest of Bomlms derhamcllus. 



117 



ous tooth lies in a different focal plane, slio;htly dorsal to 

 the molar parts of the mandililes; but possibly the latter 

 come very close to it, or even work against it to some 



Fig. 5. — E. dcpressa, larva. A, apical part of labium, and palpi, 

 ventral aspect, X 354. B, hj'popharynx ( ? incomplete), x 354 : L, 

 chitinous tooth projecting forward ; /c, ends of 5 tenflon.s. Each figure 

 is drawn from an example dissected out of a larva cleared with potash, 

 and mounted in balsam. 



extent, when the mandibles are closed. Round this tooth 

 is clinging some transparent membrane with torn edges 

 and with a shagreened or scaley appearance. At the 

 base of the tooth is a central chitinous body, oval in out- 

 line, from which arise on either side 5 tendons (fig. 5 b, 



