— 33 — 



The head of the 2nd stage (fig. 6) is relatively small, longish, 

 but most of it is retracted in the thorax and of a whitish color, 

 only few chitinous ridges are seen as a further development of 

 those in the Ist stage. The antennae still are présent as little 

 warts. The mouth parts are much better developed than in the 

 Ist stage, a bristle-set labrum is présent, the hind part of which 

 is imbedded in epistoma. The mandibles being much stronger 

 and much more strongly chitinized, and their edge now set 



Fig. 6. — Agriotypus armatus WALK. 

 A. Head of 2nd larval stage, seen from above. — B. End of the same seen from below. 



(AU figures enlarged X 50.) 



with more teeth, are situated rather far backwards under the 

 epistoma, but this latter being very feebly chitinized, the man- 

 dibles are seen very distinctly from above. The maxillae are 

 softskinned and clumsy, showing a short, wartlike palp and a 

 rather little but somewhat darker lobe. Labium is quite rudi- 

 mentary and replaced by the big, conic hypopharynx showing 

 the opening for the salivary duct. When KLAPALEK who calls 

 hypopharynx for labium also mentions labial palps, as présent, 

 this statement is erroneous. Behind the head are seen 13 body 

 segments of which the uttermost terminâtes in two hooklike 

 cerci, the function of which I hâve not been able to discover. 



