114 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 



alternatus Say, Baetis rubescens, Hagen. In the Monograph of Eaton, 1888, are 

 described the imagos of 21 taken in Canada. The following is a list of the species 

 recorded and the localities from which they were taken. Those marked with an 

 asterisk are recorded from Canada only: 



Polymitarcys albus Say; Winnipeg River. 



Emphemera guttalata Pict.; Quebec. 



Ephemera simulans Walk.; St. Martin's Falls, Albany River. 



Blasturus cupidus Say; Nova Scotia. 



Blasturus nehulosus Walk. ; St. Martin's Falls, Albany River. 

 *Ephemerella walkeri Eaton; St. Martin's F^Us, Albany River. 

 ^Ephemerella invaria Walker; St. Martin's Falls, Albany River. 

 *Baetis rubescens Hag, ; Quebec. 



Baetis pygmeus Hag.; St. Lawrence River." 



Centroptilum luteolum Miiller; St. Martin's Falls, Albany River^ 



Callibaetis hageni Etn. ; Puget Sound. 



Callihaetis ferrugineus Walsh; Quesnel Lake, B.C., and Vancouver Island. 



Siphlurus alternatus Say; North West Territory and Quebec. 

 "^Siphlurus hicolor Walker; St. 'Martin's Falls, Albany River. 

 ^Rhithrogena vitrea Walker; St. Martin's Falls, Albany River. 

 *Heptagenia canadensis Walker; Canada. 



Heptagenia verticis Say; St. Martin's Falls, Albany River. 

 *Heptagenia luridipennis Burmeister; St. Martin's Falls, Albany River and 

 St. Lawrence. 



Heptagenia vicarius Walker; St. Lawrence River. 

 *Heptagenia quebecensis Prov. ; Quebec. 

 *Heptegenia basalis Walker; Lake Winnipeg. 



Specimens of many of these are in the British Museum, London, England. 

 These were probably only casual captures and would seem to indicate a rich fauna 

 in'our northern inland waters. 



R I commenced collecting nymphs on May 25 and continued until September 6. 

 The area covered was within a radius of about five mDes of the Biological Sta- 

 tion Island. Collections of nymphs were made in localities as varied as possible, such 

 as along open shores, in quiet bays, quiet streams, rapids, above and below water- 

 falls, pools, ponds, lagoons, and in water from fifteen to forty-five feet deep. 



The chief method of collecting was that of picking up stones along the shores 

 from water three inches to two feet deep, and picking off the nymphs clinging to 

 them with a pair of forceps, or lifting off the nymphs with the blade of a pocket 

 knife. The dipnet was used in some localities and for deep water a dredge was 

 dropped from the stern of a gasoline launch. 



Each collection of nymphs, as it was brought in, was carefully examined under 

 the binocular microscope and the species separated. A number of each species 

 were then transferred to breeding jars and the remainder were killed and preserved 

 in 70% alcohol. Glass battery jars were arranged on the centre table of the lab- 

 oratory and each fitted up as nearly as possible to the conditions in which the 



