May, 1907.] 
List of Dragonflies of Canada. 
149 
is lacking it may be explained probably by the migration of 
southern species northward, either along the Pacific Coast region 
or over the broad continental land mass east of the divide, and 
the inability of many of these forms to cross the divide. For 
examples of species unable to cross this barrier see the genus 
Argia, Ischnura, Gomphus, and Sympetrum. Boreal species which 
range freely across the continent are Cordulia shurtleffi, Leu- 
corhinia hudsonica, etc. 
1. Notes on Nova Scotian Dragonflies by P. P. Calvert and 
William Sheraton. Can. Ent. Nov., 1894, pp. 317-320. 
2. Papers from the Harriman Alaska Expedition, XXII, 
Ent. Results (14) Odonata, by R. P. Currie, Proc. Wash. Acad. 
Sci. Vol. Ill, pp. 217-223, 1901. 
3. Dragonflies from the Kootenay District of British 
Columbia, by R. P. Currie, Proc. Ent. Soc. Wash. Vol. VII, 
No. 1, 1905, pp. 10-410. 
4. The dragonflies of the Province of Quebec, bv Rev. T. W. 
Fyles, 31 annual report of the Ent. Soc. of Ontario, 1900, pp. 
52—55. 
5. The Odonata of British Columbia, by R. C. Osburn, Ent. 
News, June, 1905, pp. 184-190. 
0. Orthoptera and Odonata from Algonquin Park, Ontario, 
by E. M. Walker, 30 annual report of the Ent. Soc. of Ontario, 
1905, pp. 04—70. 
7. A first list of Ontario Odonata by E. M. Walker. Can. 
Ent. Vol. XXXVIII, April, 1900, pp. 105—110, May 1900, pp. 
149-154. 
8. A new Somatochlora with a note on Ontario species bv 
E. M. Walker, Can. Ent. Vol. XXXIX, March, 1907, pp. 09-74. 
9. Dragonflies from the Magdalen Islands, by E. B. Wil¬ 
liamson, Ent. News, May, 1902, pp. 144-140. 
10. Dragonflies collected by Dr. D. A. Atkinson in New 
Foundland with notes on some species of Somatochlora, bv 
E. B. Williamson, Ent. News, April, 1900, pp. 133-139. 
In the following list of species the numbers refer to the papers 
above correspondingly numbered. The number 11 refers to my 
Algoma District list above enumerated: 
Caloptervx maculata Beauv. 4, 6, 
7, 11 
C. aequabilis Say 4, 6, 7, 11 
Lestes congener Hagen 3, 5, 6, 7, 11 
L. unguiculatus Hagen 1, 4, 7 
L. uncatus Kirby 1, 3, 5, 6,7.11 
L. disjunctus Selys 1, 6, 7, 11 
L. forcipatus Rambur 3, 5 
L. rectangularis Say 6, 7, 11 
L. vigilax Hagen 7 
Argia putrida Hagen 6, 7 
A. apicalis Say 7 
A. violacea Hagen 6, 7 
A. vivida Selys 5 
Chromagrion conditum Hagen 7, 11 
Nehalennia irene Hagen 7, 11 
Amphiagrion saucium Burm. 4, 5, 7 
Enallagma hageni Walsh 4, 6, 7 
9, 11 
E. cyathigerum Charpentier 2, 3, 
5,' 9, 10 
