68 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 



in the field, so that it might readily be overlooked. I have examined hundreds of 

 individuals in this locality, however, without finding another specimen. E. 

 ehrium is very abundant at Toronto but seems to prefer ponds on a clay or alluvial 

 soil. Such stations are wholly lacking at Go Home Bay. 



17. Enallagma exsulans (Hagen) Say. 



This is one of the very abundant species of the Carolinian Zone but it is not 

 very numerous in the Georgian Bay region. It does not occur about the small 

 lakes and marshy bays but is not uncommon along the muddier parts of the river 

 shore and along more or less shady creeks. It also occurs occasionally on the 

 muddier parts of the shores of sheltered inlets, but as a rule not where there is a 

 dense growth of reeds. 



The earliest capture of this species was on July 2, 1907; the latest Aug. 26, 

 1912. 



The nymph of exsulans has been described by Needham ('03) . 



18. Enallagma caninculatum Morse. 



Next to E. hageni, this is the commonest Enallagma in the region under 

 discussion, but it reaches maturity later in the season than other species, the first 

 examples noted having been seen about the 25th of July, 1907. On Aug. 26, 1912, 

 they were still abundant. This species it particularly characteristic of the marshier 

 and shallower parts of the shores of otherwise open waters. It frequents also 

 the narrow reed-beds which are very frequent in this region along many rocky 

 shores of inlets and channels. It is the only Enallagma of our fauna which develops 

 in water that is subject to any considerable wave-action and is thus the only 

 species that breeds about the Station Island. The nymphs are also found at much 

 greater depths than those of other species of this genus. At Lake Simcoe I have 

 found the exuviae clinging to reeds in water five feet deep. A description of the 

 nymph is given by Needham ('03) . 



19. Enallagma signatum (Hagen) Selys. 



This species, which is very abundant at Toronto, occurs somewhat sparingly 

 at Go Home Bay, where it may be observed flying over lily-pads on sluggish 

 creeks. It was first noticed on July 16, 1907, but became commoner after that date. 



A number of specimens of the nymph (PI. Ill, Fig. 7, 8) at various stages, 

 including full-grown examples, were collected by Mr. Wodehouse at Waubau- 

 shene. May 29, at Killarney June 24th and in a small lake on Fitzwilliam Island, 

 June 24, 1912. The nymph has been described and figured by Needham ('03). 



19. Enallagma poUutum (Hagen) Selys. 



This beautiful species is common on the river and the inner parts of the bay, 



