Fig. 94. — Larva of Baetis (Kcdyunis) fluminiiin. A, the larva; \>, mouth-parts of 

 do. ; C, one of the tracheal gills ; I), the two wiiig-covers of the right side ; K, 

 mandible ; F, nia.xilla and its palp ; G, laliial palp. 



