H 



Fig. 84. Types of caudal gill in Lestid and Agrionid larvae. A. Synlestes weyerai 

 Selys ( x 16). B. Austrolesles cingulatus Burm. ( x 13). c. Neosticta canescens 

 Tillyard ( x 13). D. Isosticta simplex Martin ( x 14). E. Caliagrion billing- 

 hursti Martin ( x 11). F. The same, region of node ( x 32). o. Ischnura 

 heterosticta Burm. ( x 13). H. Argiocnemis rubescerw Selys ( x 13). A-F, median 

 gills. G-H, lateral gills, n node. Original, cedar-oil preparations. 



T, D.-F. 13 



