The Relation of Mollusks to Fish in Oneida Lake 303 
figure of this and other May-fly larvee may be seen in Clemens 
(1915, plate XV, fig. 1). See also Needham (1901, p. 418). 
Hphemerella species. 
Several nymphs of this genus were obtained from the 
stomach of the Manitou Darter. 
Ephemera species. 
Nymphs of this genus were observed in the stomach of the 
Manitou Darter. 
Cents species. 
Nymphs of this species were obtained from the stomachs 
of the Manitou Darter and the Chain Pickerel. 
Callibetis species. 
Several nymphs were observed in the stomach contents of 
the Painted Terrapin and the Chain Pickerel. 
ORDER ODONATA ( Dragon-flies). 
Famity Ageriontip® (Damsel-flies). 
Enallagma signatum Hagen. 
Nymphs of this species were obtained at station XL. 
Enallagma species. 
Nymphs of several species of this genus were observed at 
stations XVI," XXX,‘ and XX XIX. Also in the stomachs 
of the Painted Terrapin, Chain Pickerel, and Manitou 
Darter. 
Famity AtscHNID&. 
Gomphus sordidus Hagen. 
Collected from stations [X, and XXX." All nymphs. 
Basiveschna janata Say. 
Nymphs of this species were secured at station I.” 
A schna species. 
Nymphs were secured from station X XX." 
