316 NEW YORK STATE MUSEUM 



EXPLANATIONS TO THE PLATES 



PLATE 1 

 The bull-frog, Rana catesbiana Shaw. Photo by Dr. J. L. Hancock 



PLATE 2 

 Hemerobian wings 



1 Wings of Hemerobius tutatrix Fitch. 



2 Wings of Spadobius occidentalis Fitch. 



PLATE 3 

 Hemerobian wings 



1 Wings of Micromus insipidus Hagen. 



2 Wings of Micromus jonas sp. nov. 



3' Wings of Palmobius amiculus Fitch. 



PLATE 4 

 Mayflies 



1 Wings of subimago of Baetisca obesa Say. showing color 



pattern : 1, 2, 3, anal veins. 



2 Lateral view of nymph of Baetisca obesa Say 



3 Wings of imago of Ecdyurus maculipennis Walsh 



4 Wings of imago of Heptagenia interpunctata Say 



PLATE 5 

 Chirotenetes 



1 Female imago of Chirotenetes albornanicatus sp. uov. 



2 Wings of subimago of same 



3 Lateral view of nymph of same 



4 Dorsal view of nymph of same 



PLATE 6 

 Chirotenetes 



1 End of male abdomen of Chirotenetes albomanicatus sp.* 



nov. viewed from below ; f, forceps ; m, rudimentary median caudal 

 seta 



2 Labrum of nymph of same species 



3 Labium of nymph of same 



4 Mandible of nymph of same 



5 Maxilla of nymph of same, with suboval gill tuft attached 



6 Base of antenna of nymph of same 



7 Fore leg of same, with coxal gill tuft attached 



8 Hind leg of same 



9 Claw of hind tarsus of same 



10 Gill lamella of the fourth abdominal segment with gill tuft attached to 

 its base on the under side 



PLATE 7 

 Mayfly nymphs (photographed from alcoholic specimens) 



1 Nymph of Ameletus ludens sp. nov. 



2 Nymph of Choroterpes basalis Banks 



3 Nymph of Ecdyurus maculipennis Walsh 



* White fore torsi accidentally cut away in cutting out the back-ground. 



