SPONGILLA-FLIES — PARFIN AND GURNEY 



431 



Figure 3.— Larvae. A, B, E, F, H, J, Climacia areolaris (Hagen): A, Ist-instar larva; 

 ' 2d-instar larva, showing seta x; E, 3d-instar larva, head, ventral view: F, same, head 

 ;sected, ventral view of bases of mouthparts; H, same, antenna, terminal segments; 

 same, head, lateral view of left side and internal view of bases of mouthparts. C, Osmylus, 

 -instar larva (adapted from KiUington, 1936, pi. 9, fig. 1). D, Sisyra vicaria (Walker), 

 -instar larva, showing seta x; G, same, antenna, terminal segments; I, same, tracheal 



