58 PAPERS ON ZOOLOGY OF MICHIGAN. 



Needham, J. G., Aquatic Insects in Xew York State, Bull. 68, N. Y. 



State IMus., pp, 199-501, 1903. 

 O'Brien, Abigail, Odonata Collected at Douglas Lake, Michigan, in the 



Summer of 1910, Rept. Mich. Acad. Sci., for 1910, pp. 14-4-145, 191L 

 Walker, E. M., The North American Dragonflies of the Genus Aeshna^ 



Uni. Toronto Studies, Biol. Ser. No. 11, 1912. 

 Williamson, E. B., Dragonflies of Indiana, Rept. Ind. Dept. Geol. Nat. 



Resources, for 1899, pp. 229-333, 1900. 

 Idem, Notes on a Few Wyoming Dragonflies, Ent. News, Vol. XI, 



No. 5, p. 457, 1900. 



