1905 ENTOMOLOGICAL SOCIETY. 65 



luxuriant balsams and spruce ; in the other parts there are rocky, turbulent 

 rapids, and the banks are much higher with a much more varied vegetation. 

 In other places, again, the rapids are smoother and shallower, with gravelly 

 bottoms, and there are steep sandbanks on either side. Each kind of locality 

 has its peculiar species of dragonflies, more species apparently being found 

 about the gentle rapids than elsewhere. 



Algonquin Park, which covers an area of about 1,600 square miles just 

 north of the Muskoka District, lies at the extreme northern limits of the 

 Transition life zone as it passes into the Boreal zone. Many forms of plant 

 and animal life found within its limits do not belong to the Boreal zone in 

 a restricted sense, but on the whole the flora and fauna are of a Boreal type. 

 In the partly cleared and cultivated country in the vicinity of Dwight, lying 

 to the south-west of the Park limits, several species of insects belonging to 

 the Transition and Austral zones were met with, which did not appear 

 within the Park limits. Among these are the following Orthoptera : 



Spharagemon Bolli, Scudd. A single male of average size was taken 

 at Dwight. This locust belongs to the Austral and warmer parts of the 

 Transition zones, and becomes smaller in the northern part of its range. It 

 is abundant and of large size in the Austral strip along Lake Erie, but be- 

 comes smaller and scarcer at Sarnia and Toronto, north of which I have 

 never before taken it, except a single female from Peterboro' County. 



Mecostethus linefLtus, Scudd. This species was found among the sedge 

 bordering a small lake in a brule near Dwight. It belongs to the Transition 

 and northern parts of the Upper Austral zones, and is replaced in the Boreal 

 by its ally, M. gracilis, Scudd., whose range in Ontario overlaps that of 

 lineaUis considerably, as it extends southward to the watershed between 

 Lake Simcoe and Lake Ontario. M. gracilis was not found in the Park, but 

 doubtless occurs there. 



OrchelimuTn vulgare, Harr. This grasshopper was found in small num- 

 bers in the fields about Dwight, but did not appear in the Park, nor could 

 I find it at North Bay, Lake Nipissing, in September, 1900, although the 

 proper surroundings apart from the northern latitude were apparently often 

 met with. This species and Co7iocephalus ensiger, Harr., are enumerated by 

 Scudder among the Alpine Orthoptera of the White Mountains (Appalachia, 

 VIII,, No. IV., p. 19). Their range seems to stop short of the Boreal zone 

 in Ontario and I found the same to be true in Quebec. 



Scudderia furcata, Brunn. A single male was taken near Dwight. It 

 ranges at least as far north as Lake Nipissing, but I doubt its being a truly 

 Boreal form. It is much commoner southwards. 



Except the above species, all of which were taken near Dwight, outside 

 the Park limits, and possibly another (Nemobius palustris, Bl.), whose 

 range is not yet well enough known, all the Orthoptera in the list are in- 

 habitants of the Boreal zone. N. palustris has elsewhere been taken only in 

 the peat bogs of Northern Indi-ana, where several northern Orthoptera occur. 



Of the Odonata, the comparatively large number of Cordulinse, despite 

 the fact that their season was practically over, testifies to the Boreal charac- 

 ter of the dragonfly fauna. Most of these Cordulinse are represented by 

 nymphal exuviae .only. But one dragonfly, Celithernis elisa, Hagen, taken 

 near Dwight, did not appear within the Park limits. I have never before 

 seen it so far north. It is fairly common in the Austral and lower part of 

 the Transition zones in Ontario. 



The absence of Libelhilm I do not regard as significant of anything but 

 the rather late season in which most of the collecting was done, and the char- 

 acter of the bodies of water met with. 



5 ENTO. 



