AQUATIC INSECTS IN THE ADIRONDACKS 59I 



PLATE 11 



Ephemera varia Etn., and Siphlurus alternatus Say 



FIG. 



1 Lateral view of the nymph of E . v ar i a 



2 Dorsal view of the nymph of E . varia 



3 Lateral view of the male imago of E . varia 



4 Dorsal view of the male imago of E . varia 



5 Lateral view of the nymph of 8 . alternatu's 



6 Dorsal view of the nymph of S. alternatus 



7 Lateral view of the male imago ofS. alternatus 



PLATE 12 



Climacia dictyona Needham, nov. sp., and Sisyra umbrata 



Needham, nov. sp. 



Fig. 



1 Imago of C. dictyona, lateral view, x 4 



2 Imago of C. dictyona, dorsal view, x 3 



3 Larva of C. dictyona, dorsal view, x 6 



4 Pupal cases of C. dictyona, in situ, natural size 



5 One of the same, enlarged, showing the hexagonal meshes of the outer cov- 



ering 



6 Imago of S. umbrata, lateral view, x 4 



7 Imago of S. umbrata, dorsal view, x'3 



8 Two newly formed pupae of S. umbrata, lateral and ventral views, x 6 



9 Macronychus glabratus Say (Coleoptera: Parnidae); an associate 



of the sponge fliy larvae, on submerged timbers 



10 Fresh-water sponges (Spongilla ?fragilis Leidy) in situ, with the 

 sponge fly larvae crawling about over them 



.11 Two pupal cases of S. umbrata, showing the closely woven outer cover- 

 ing, natural size 



PLATE 13 



Molanna cinerea Hagen and Polycentropus lucidus Hagen 



Fig. 



1 Dorsal view of larva of Molanna cinerea, x4 



2 Lateral view of larva of M. cinerea, x5 



3 Lateral view of the pupa of M. cinerea, x4i 



4 Dorsal view of imago of M. cinerea, x4 



5 The accustomed resting position of the imago of M. cinerea 



6 Ventral view of the flat larval case of M . cinerea, x2 



7 Lateral view of larva of Polycentropus lucidus, showing the very 



long anal prolegs, and the absence of gill filaments, x5 



8 Lateral view of pupa of P. lucidus, x6 



9 Dorsal view of imago of P. lucidus, x3| 



10 Larval case of P. lucidus; tube composed of sand and silk; the enlarge- 



ment near the end is two layered, and contains the pupa. 



11 Eggs laid by P. 1 u ci d us female on a stick protruding from the water in a 



breeding cage 



