68 



THE LARVA OR NYMPH 



[CH. 



Fig. 24. Hatching of the larva of Anax papuensis Burm. A. Embryo in egg, 

 before hatching. B, c. Emergence of pronymph. D, B. Emergence of larva 

 from pronymphal sheath, a anus; ad appendix dorsalis; ant antenna; 

 br branchial basket; c cerci; ch cephalic heart; cZclypeus; d dorsal tracheal 

 trunk ; esh egg-shell ; hv head-vesicle ; Ibr labrum ; Im labial mask ; m mid -gut ; 

 md mandible; mx^ first maxilla; Pf-p^ legs; ped pedicel of egg; prs pro- 

 nymphal sheath; rv rectal valves. (x30.) Original. 



