D 





G 



FIG. 94-. Larva of Raetis (Ecclyurus) fluminum. A, the larva; 1), mquth-pam of 

 do. ; C, one of the tracheal gills; I), the t\vo wing-covers of the right side ; E, 

 mandible ; F, maxilla and its palp ; G, labial palp. 



