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 shurtlefifi, Leu- 

 corhinia hudsonica, etc. 



1. Notes on Nova Scotian Dragonflies bv P. P. Calvert and 

 Wilham Sheraton. Can. Ent. Nov., 1894, pp. '317-320. 



2. Papers from the Harriman Alaska Expedition, XXII, 

 Ent. Results (14) Odonata, bv R. P. Currie, Proc. Wash. Acad. 

 Sci. Vol. Ill, pp. 217-223, 1901.^ 



3. Dragonflies from the Kootenav District of British 

 Columbia, bv R. P. Currie, Proc. Ent.' Soc. Wash. Vol. VII, 

 No. 1, 1905, 'pp. 1(3-20. 



4. The dragonflies of the Province of Quebec, by Rev. T. W. 

 Fyles, 31 annual report of the Ent. Soc. of Ontario, 1900, pp. 

 52-55. 



5. The Odonata of British Columbia, bv R. C. Osburn, Ent. 

 News, June, 1905, pp. 184-196. 



6. Orthoptera and Odonata from Algonquin Park, Ontario, 

 hv E. M. Walker, 30 annual report of the Ent. Soc. of Ontario, 

 1905, pp. 64-70. 



7. A first list of Ontario Odonata bv E. M. Walker. Can. 

 Ent. Vol. XXXVIII, April, 1906, pp. IO'5-IIO, Mav 1906, pp. 

 149-154. 



8. A new Somatochlora with a note on Ontario species by 

 E. M. Walker, Can. Ent. Vol. XXXIX, March, 1907, pp. 69-74. 



9. Dragonflies from the Magdalen Islands, bv E. B. Wil- 

 liamson, Ent. News, May, 1902, pp. 144-146. 



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, 1906, pp. 133-139. 



In the following list of species the numbers refer to the papers 

 above correspondingly numbered. The number 11 refers to mv 

 Algoma District list above enumerated: 



Calopteryx maculata Beauv. 4, 6, A. apicalis Say 7 



7, 11 A. violacea Hagen 6, 7 



C. aequabilis Say 4, 6, 7, 11 A. vivida Selys 5 



Lestes congener Hagen 3, 5, 6, 7, 11 Chromagrion condituni Hagen 7, 11 



L. unguiculatiis Hagen 1, 4, 7 Nehalennia irene Hagen 7, 11 



L. uncatus Kirby 1, S, 5, 6,7,11 Amphiagrion saucium Burm. 4. 5, 7 



L. disjunctus SelVs 1, 6, 7, 11 Enallagma hageni Walsh 4, 6, 7. 



L. forcipatus Rambur 3, 5 9, 11 



L. rectangularis Say 6, 7, 11 E. cyathigerum Charpentier 2, 3, 



L. vigilax Hagen 7 5, 9, 10 

 Argia putrida Hagen 6, 7 



