106 
Fig. 
29. 
30. 
Annals Entomological Society of America [Vol. V, 
PLATE VII. 
Wing-pad of Siphlurus sp? 
Wing of 
Wing-pad of Callibaetis sp? 
Wing of 
Successive stages of wing-pads of Chirotonetes albomanicatus Needham. 
Successive stages of wing-pads of Blasturus cupidus Say. 
Base of wing-pad of Hexagenia sp? 
Wing-pad of Blasturus cupidus showing variation in aeration. 
Wing-pad of Heptagenia sp? (No. 3 Needham). showing variation in Rs? 
Wing-pad of Ephemera showing slight variation in tracheation. 
PiateE VIII. 
Hind wing-pad of Chirotontes albomanicatus Needham, 
wing of “ 
“-wing-pad of Heptagenia sp? 
“wing 
“  wing-pad of “sp? (Nymph No. 3, Needham). 
“wing of ‘ 
“ wing-pad of Epeorus humeralis Morgan. 
“wing of 
“_-wing-pad of Callibaetis sp? 
“wing of 
“ wing-pad of Leptophlebia sp? 
“wing of 
PLATE IX. 
Wing of Potamanthus luteus (after Eaton). 
Calliarcys humilis 
“  Tricorythus (Malay sp.) 
“  Spanophlebia Trailiz. 
“~~ Lachlania abnormis 
“ Oligoneuria rhenana 
“ Elassoneuria Trimeniana 
Fossil May-fly. Type of genus Protereisma (after Sellards). 
« ns Wing of Prodromus rectus 
: ¥ Wing of Protereisma minus S 
e iS Wing of Protechma accuminatum “ 
s . Wing of Rekter arcuatus i 
Baetis anomala (after Pictet-Baraban and Hagen). 
