LIST OF ILLUSTRATIONS 



FIG. PACK 



1. Wings of Hydropsyche guttata, 3 , . . n 



2. Legs of Silo nigricornis . . . . .21 



3. Dorsal markings of: I. Ephemera vulgata. 



2. Ephemera lineata. 3. Ephemera danita . 27 



4. Hind-wing of olive spinner . . . . 29 



5. Hind-wing of Baetis binoculatus, pale watery 



spinner 30 



6. Hind-wing of Centroptilum luteolum, pale 



watery spinner 30 



7. Hind-wing of Centroptilum pennulatum, pale 



watery spinner ...... 30 



8. Fore-wing of Baetis species . . . .31 



9. Fore-wing of Centroptilum species . . .31 



10. Hind- wing of Baetis pumilus, iron-blue 



spinner 33 



11. Hind- wing of Ephemerella ignita, sherry 



spinner . . . . . . 35 



12. Genitalia of Ecdynrus venosus,<$, great red 



spinner 36 



13. Genitalia of Phryganea striata, <$ , from above . 41 



14. Genitalia of Phryganea grandis, <J , from above 42 



15. Pupal grating of Limnophilus lunatus . . 43 



1 6. Pupal grating of Limnophilus rhombicus . . 44 



17. Genital'a of Anabolia nervosa, 6 , from above . 45 



1 8. Pupal grating of Chcstopteryx villosa . . 46 



19. Genital'a of Stenophylax stellatus, $ , from the 



side 48 



20. Head of Serico*toma pwsona'um, 6 (Welsh- 



man's button) ...... 50 



