LIST OF PLATES 



"DETACHED BADGER" AT WORK Frontispiece 



PLATE FACING PAGE 



1. THE MAY-FLY. Nymph, sub-imago, male ; 



imago, female 24 



2. BAETIS SPECIES. Olive dun, male ; dark 



olive dun, male. Olive spinner, female, 

 spent ; olive spinner, female ; olive spinner, 

 male . . . . . . . .28 



3. PALE WATERY DUNS AND SPINNERS. Pale 



watery dun, male ; Pale watery spinner, 

 female ; Pale watery spinner, male. Eyes of 

 Baetis binoculatus, B. scambus, Centroptilum 

 luteolum, and C. pennulatum, male spinners 30 



4. IRON-BLUE AND CENIS. Iron-blue dun, 



male ; iron-blue spinner, female ; iron- 

 blue spinner, male (jenny spinner). Ccenis 

 halterata, imago, female . . . .32 



5. EPHEMERELLA IGNITA. Blue-winged olive, 



male ; sherry spinner, male ; sherry 

 spinner, female, in flight ; sherry spinner, 

 female 34 



6. ECDYURUS AND HEPTAGENiA. March brown, 



nymph ; march brown, female ; march 

 brown spinner, male (the great red spinner). 

 Yellow may dun, male; yellow may 

 spinner, female 36 



7. LEPTOPHLEBIA SPECIES. Turkey brown, 



female ; turkey brown spinner, male ; 

 turkey brown spinner, female. Claret 

 dun, female 38 



8. LARGE RED SEDGE. Phryganea striata, 



female ; Phyrganea grandis, male . . 40 

 xvii 



