364 DRAGONFLIES OF NORTH AMERICA 

1916. The Nymphs of the North American Species of Leucorrhinia. 
Can. Ent. 48: 414—422. 
—— 1916. The Nymphs of Enallagma cyathigerum and E. calverti. Can. 
Ent. 47: 192-196. 
1917. The Known Nymphs of the North American species of Sym- 
petrum. Can. Ent. 49: 409-418. 2 pl. 
1917. Seasonal Irregularities in the Occurrence of Dragonflies. Can. 
Ent. 49: 171-178. 
1917. Some Dragonflies from Prince Edward Island. Can. Ent. 49: 
117-119. 
1918. Notes on Agrion aequabile hudsonicum Hagen. Can. Ent. 50: 
406-410. 
1918. On the American Representatives of Somatochlora Arctica with 
Descriptions of two new species. Can. Ent. 50: 365-376. 1 pl. 
1921. Nymph and Breeding Place of Aeschna sitchensis. Can. Ent. 53: 
221-226. 
1923. Notes on the Odonata of Godbout, Que. Can. Ent. 55: 5-12. 
1924. Odonata of the Thunder Bay District, Ontario. Can. Ent. 56 
170-176. 
1925. The N. A. Dragonflies of the Genus Somatochlora. U. of Toronto 
Studies, Biol. Series, 1-202. 
—-—— 1927. Odonata of the Canadian Cordillera. Brit. Col. Special Pub. 
Victoria, B. C. pp. 3-15. 
1928. The Nymphs of the Stylurus Group of the Genus Gomphus with 
Notes on the Distribution of this Group in Canada. Can. Ent. 60, 
pp. 79-88. 
Warren, Alfred. 1915. A Study of the Food Habits of Hawaiian Dragonflies. 
College of Hawaii Pub. Bul. 3: 1-36. 4 pl. 
Weber, L. 1918. Odonata of Iowa. Proc. Iowa Acad. Sci. 24: 327-333. 
Whedon, A. D. 1914. Preliminary Notes on the Odonata of Southern Minnesota. 
Rep. of State Ent. Minn. 13 and 14, 78-103. 4 pl. 3 fig. 
1919. The Comparative Morphology and Possible Adaptations of the 
Abdomen in the Odonata. Trans. Am. Ent. Soc. 44: 373-437. 
Whitehouse, F. C. 1917. The Odonata of the Red Deer District, Alberta. Can. 
Ent. 49: 96-103. 
1918. Dragonflies of Alberta. Pub. Alta. Nat. Hist. Soc. 16 pp. 
Williamson, E. B. 1910. A new species of Celithemis. Reprinted from Ohio 
Naturalist May ’10, 153-160. 3 pl. 
1912. The Known Indiana Somatochloras. Ent. News 23: 152-155. 
1912. The Dragonfly Argia moesta and a New Species. Ent. News 
23: 196-208. 
1912. Hetaerina titia and tricolor. Ent. News 23: 98-101. 
1913. The Medio-anal Link in Agrioninae. Ent. News 24: 258-261. 
1913. Some Colorado Dragonfly Records. Ent. News 24: 372. 
—-—— 1914. September Dragonflies about Mesa Arizona. Ent. News 25: 
225-226. 
1914. Sympetrum obtrusum and costiferum in Maine. Ent. News 
25: 456. 
1914. Gomphus pallidus and Two New Related Species. Ent. News 
25: 49-58. 2 pl. 



















