26 WORKS ON NOETH AMERICAN ENTOMOLOGY. 



I^ovKLL, J. II. — The Ijiiiiiblebees of Southern Maine. <Ent. News, 

 11)07, pp. 195-200. 



The Colletida? of Southern Mame. <Can. Ent., 1907, pp. 



363-3G5. 



and CocKERELL, T. D. A. — The Bees of Maine. Sphecodidae. 



< Psyche, 1907, pp. 101-110. 

 List of American species. 

 The IMegachilidse of Southern Maine. <Psyche, 1907, pp. 



15-21. 



The Ilalictidie of Southern Maine. <Psyche, 1908, pp. 82^0. 



The Nomadine and Epeoline bees of Southern Maine. . 



< Psyche, 1905, pp. 39-i2. 

 Robertson, C. — Synopsis of Anthophihi. <Can. Ent., 1904, pp. 



37-44. 



This and the following papers by Mr. Robertson treat of the Illinois 

 bees. 



Synopsis of Sphecodina?. <Ent. News, 1903, pp. 103-107. 



Synopsis of Euceridse, Emphoridw, and Anthophoridse. 



<Trans. Amer. Ent. Soc, xxxi, pp. 305-372, 1905. 



Synopsis of Epeolina\ <Can. Ent., 1903, pp. 284-288. 



Synopsis of Prosopis and Colletes, with sup])lementary notes 



and descriptions. <Can. Ent., 1904, pp. 273-278. 



Synopsis of Xomadina\ <Can. Ent., 1903, pp. 172-179. 



Synopsis of Halictina?. <Can. Ent., 1902, pp. 243-250. 



Synopsis of the Andrenina. <Trans. Amer. Ent. Soc, xxviii. 



pp. 187-195, 1902. 



Synopsis of Megachilida^ and Bombiiia. < Trans. Amer. Ent, 



Soc, XXIX, })p. 163-178, 1903. 



Brues, C. T.— Studies of Texan Bees. <Ent. News, 1903, pp. 79-85. 

 Tables of Texan Epeolus and Coelioxys. 



Swenk, M. H., and Cockerell, T. D. A. — The bees of Nebraska. 

 <Ent. News, 1907, pp. 51-58, 178-187, 293-300. 



Cockerell, T. D. A. — The bees of Ek)rissant, Colorado, <Bul, 



Amer. Mus. Nat, Hist., xxii, pp, 419-455, 1900. 

 Table of genera near Ileriades. 

 -The bees of the genus Nomada found in Colorado. <Bul. 94, 



Colo. Agr. Exp. St a., pp. ('.9-85, 1904. 



^J'lTUS, E, S, G.— Colorado Bombida\ <Can. Ent., 1902, pp. 37-44. 



