334 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull 



1916a. Concerning Problems in Aphid Ecology. Journal Econ. Ento- 

 mology, vol. 9, pp. 44-51. 

 1916b. Elm Leaf Rosette and Woolly Aphid of the Apple. Maine 



Agricultural Experiment Station, Bulletin No. 256. 

 1917a. Eastern Aphids, New or Little Known. Journal Econ. Ento- 

 mology, vol. 10, No. 4. 

 1917b. The Aphid of Chokeberry and Grain. Maine Agricultural 



Experiment Station, Bulletin No. 267. 

 1920a. Three Pink and Green Aphids of the Rose. Maine Agricultural 



Experiment Station, Bulletin No. 282. 

 1921a. Rose Bushes in Relation to Potato Culture, Maine Agricultural 

 Experiment Station, Bulletin No, 303. 

 Pergande, Theo. 1901. The Life History of Two Species of Plant Lice 

 Inhabiting both the Witchhazel and Birch. U. S. Dept. Agric, Div. of 

 Ent, Technical Series, No. 9. 

 1903. North American Phylloxerinae Affecting Hicoria (Carya) and 

 other Trees. 

 Riley, C. V. 1889. Report of the Entomologist for 1888. In Report of 



the Commissioner of Agriculture, Washington. 

 Ross, William A. 1918b. Forty-eighth Annual Report of the Entomolog- 

 ical Society of Ontario for 1917, pp. 59-68. 

 Sanborn, Charles E. 1904. Kansas Aphididae. Kansas University Science 



Bulletin, vol. iii, pp. 1-82. 

 Sanderson, E. Dwight. 1901. Report of the Entomologist in Twelfth 

 Annual Report of the Delaware College Agricultural Experiment 

 Station. 

 1902. Report of the Entomologist in Thirteenth Annual Report of the 

 Delaware College Agricultural Experiment Station. 

 Swain, Albert F. 1919a. A Synopsis of the Aphididae of California. 

 University of California Technical Bull., vol. 3, No. i, pp. 221, 17 pla. 

 Theobald, Fred V. 1912. Report on Economic Zoology. Southeastern 

 Agricultural College, Wye. for year ending September 30, 1912. 

 1913a. The British Species of the Genus Macrosiphum Passerini. Part 



I. Jour. Econ. Biol., vol. viii. No. 2. 



1913b. The British Species of the Genus Macrosiphum Passerini. Part 



II. Jour. Econ. Biol., vol. viii, No. 3. 



Thomas, Cyrus. 1879. Eighth Report of the State Entomologist on the 



Noxious and Beneficial Insects of the State of Illinois. 

 Tullgren, Albert. 1909. Aphidologische Studien, I. Arkiv fur Zoologi. 



Band 5, No. 14. 

 van der Goot, P. 1915. Beitrage zur Kenntnis der Hollandischen Blatt- 



lause. Haarlem. 

 Vickery, R. A. 1908. A Comparative Study of the External Anatomy of 



Plant Lice. In the Twelfth Report of State Entomologist of Minnesota. 

 191 0. Contributions to a Knowledge of the Corn Root Aphis. U. S. 



Department of Agriculture, Bur. of Ent, Bull. No. 85, Part vi. 

 Webster, F. M. and Phillips, W. J. 1912. The Spring Grain Aphis or 



"Green Bug." U. S. Dept. Agric. Bur. of Ent, Bull. No. no. 

 Weed, C. M. 1890. Fourth Contribution to a Knowledge of the Life 



History of Certain Little Known Plant Lice. Bulletin of the Ohio 



Agric. Exp. Station. Technical Series, vol. i. No. 2. 

 Wilson, H. F. 1908. The Green Aphis of the Chrysanthemum, Aphis 



rufomaculata n. sp. Entomological News, vol. 19, pp. 261-262. 

 1909. Notes on Lachniis caryae Harris, under a new name. The 



Canadian Entomologist, vol. 41, PP- 385-387. 

 1915b. Miscellaneous Aphid Notes, chiefly from Oregon. Transactions 



of the American Entomological Society, 41, pp. 85-108. 

 1915c. A Synopsis of the Aphid Tribe Pterocommini. Annals of 



Entomological Society of America, vol. viii, pp. 347-358. 



