THE CANADIAN ENTOMOLOGIST 209 



A. pensus Horn. 



Frost, Can. Pint., Vol. XLVII, p. 144, 1915. 

 On leaves of Ostrya and beaten from Alnus incana (Frost). 

 A. anxius Gory. 



Burke, U. S. D. A., Year Book, p. 403, 1909. 

 Chamberlain, Sci. Amcr. ^0, Jan., p. 42, 1900. 

 Chittenden, U. S. D. A., Div. Ent. Bui. 18, n. s., pp. 44-51, 1898. 

 U. S. D. A., Div. Ent. Bui. 22, n. s., pp. 64-68, 1900. 

 U. S. Fores. Eul. 46, pp. 63-80, 1904. 

 Davis, Jour. Econ. Ent., Vol. Ill, p. 184, 1910. 



" Ins. Life, Vol. IV, p. 66 (torpidus). 

 Felt, Count. Gentl. Dec. 15, p. 993, 1898. 

 " N. Y. St. Mus. Bui., \^ol. 8, No. 37, 1900. 

 " N. Y. St. Mus. Mem. 8, p. 284, 1905. 

 " N. Y. Kept. 25, p. 95, 1910. 

 " N. Y. Rept. 27, p. 1C8, 1912. 

 " Card. Mag. Feb., p. 36, 1912. 

 " N. Y. Rept. 28, p. ICl, 1913. 

 " N. Y. St. Mus. Bui. 200, p. 49, 1917. 

 Fernald, Jour. Econ. Ent., Vol. V, p. 246, 1912. 

 Mass. Rept. 24, I. p. 83, 1912. 

 Mass. Rept. 25, II, p. 85, 1913. 

 Forbes, Bui. 151, 111. Agric. Exp. Sta., p. 515, 1911. 



" 111. Ent. Rept. 26, p. 53, 1911. 

 Gibson, Ont. Ent. Soc. Rept. 40, p. 13, 1910. 

 Hopkins, U. S. D. A., Div. Ent. Bui. 48, 1904. 

 Houser, Bui. 332, Ohio Agric. Exp. Sta., p. 326, 1918. 

 Hutchings, 9th Ann. Rept. Quebec Soc, Prot. PI. p. 65, 70, 1916. 

 Knull, Ent. News, Vol. XXXI, p. 10, 1920. 

 Lochhead, Rept. Ont. Agr:c. Coll. & Exp. Farms, 1902. 

 Ruggles, 14th Rept. St. M:'nn., p. 57, 1911, 1912. 

 Sanders, Wis. Bui. 227, p. 22, 1912. 

 Slingerland, Proc. West. N. Y. Hort. Soc, Apl., 1899. 



N. Y. Cornell Bui. 234, 1906. 

 Smith, Ins. N. J., p. 295, 1909. 

 " N. J. Rept., p. 415. 1909. 

 " N. J. Rept., p. 348, 1910. 

 Swaine, Ont. Ent. Soc. Rept. 43, p. 91, 1913. 



" 7th Ann. Rept. Quebec Soc. Prot. PL, pp. 91-115, 1915. 

 " Can. Fores. Jour., Vol. XIII, p. 1928, 1918. 

 Turner, Ga. Bd. Ent. Bui. 49, p. 28, 1918. 

 Washburn, Minn. Rept. 12, p. 98, 1908. 

 Minn. Rept. 14, p. 57, 1912. 

 U. S. D. A., Year Book, p. 550, 1907. 

 U. S. D. A., Year Book, p. 578, 1908. 

 Known as the bronze birch borer, this species is a serious pest of the birches. 

 Eggs are deposited in crevices in the bark and the first tunnels constructed by 

 the larvae lie close under the bark. As feeding continues, the burrows are 



