PLATE 1 



EXPLANATION OF FIGURES 



2 Dorsal aspect of larva outlined by camera lucida showing general ap- 

 pearance. Note especially the number and arrangement of bristles and the 

 sharp divisions between segments. The dotted line in the head represents a 

 suture. The heavy black line is a chitinous bar in the dorsal wall of the head. 



3 Ventral view of larva showing bristles, etc. The four pairs of bristles 

 which occur on the ventral surface of the head are not indicated. The two 

 black lines are chitinous bars, supporting the mandibular articulation. 



4 Diagrammatic cross-section of an abdominal segment showing arrange- 

 ment of bristles and outline of depressed body. 



5 Drawing of head as seen from above, viewed as a semi-transparent 

 object. A, Antenna; C, Clypeus; L, Labrum; M, Mandible; Ma, Mandibular 

 articulation; EM. External mandibular muscle; IM, Internal mandibular muscle; 

 7', Tentorium; S, Suture line between. front and genae. 



6 The head as seen from below, highly magnified. A, Antenna; L, Labium; 

 .1/, .Mandible; MA, Ventral mandibular articulation; MAX, Maxilla; CB, Chi- 

 tinous bar supporting the mandibular articulation. 



256 



