256 MAINE AGRICUI.TURAI. EXPERIMENT STATION. I912. 



1879. Schizoneura lanigcra, Thomas, III. Report of the State Ento- 

 mologist 111. VIII, p. 126. Important historical discussion. 



1879. Schizoneura ulmi, Linn., Thomas (III) Rept. of the State. Ent. 

 111., VIII, p. 140. 



1885. Schizoneura rilcyi, Forbes. Rept. Ent. 111. 14: 114. 



1887. Schizoneura amcricana, Oestlund, O. W. Aphid. Minn. p. 27. 

 Description of winged form and pseudo gall. 



1887. Schizoneura crataegi, Oestlund. Aphid. Minn. p. -zy. Descrip- 



tion of winged form and account of attack on Crataegus punc- 

 tata. (Now considered to be the same as lanigera by Pro- 

 fessor Oestlund.) 



1888. Schizoneura riley'i, Lintner. 3rd Report, p. 125. 



1890. Schizoneura rilcyi, Packard. Fifth Rept. U. S. Entom. Com. 



Wash. Original description of insect quoted. 

 1890. Schizoneura amcricana, Packard. , Fifth Rept. U. S. Entom. Com. 



p. 279. Extract from Riley Bui. U. S. Geol. and Geograph. 



Survey, Vol. V, No. i. 

 1897. Schizoneura americana, Gillette, C. P. Bui. Div. Ent. U. S. Dept. 



Agric. 9 (n. s.) : 78-79. Description of work. 



1897. Schizoneura lanigcra, Marlatt, C. L. Circ. 20, Second Ser., Div. 



of Ent. 



1898. Schizoneura americana, Gillette, C. P. Bui. A. E. S. Colo. 47: 



35-36. Account of work. Economic treatment. Fig. 32 photo 

 of work. 



1899. (1900). Schizoneura americana, Harvey. Bui. Me. Agr. Exp. Sta. 



No. 61. Indcm. Ann. Rept. of Me. Agr. Exp. Sta. for 1900, p. 

 32. Mentioned as abundant. Photograph of leaf curl. 



1900. Schizoneura americana. Lugger. Bui. No. 69. Minn. Agr. Exp. 



Sta. Id. 6th Ann. Rept. St. Ent. of the St. Exp. Sta. Univ. of 

 Minn. pp. 168, 169. Fig. 148 after Riley. 



1901. Schizoneura americana, Aldrich. Idaho Agric. Exp. Sta. Feby. 



Bui. 26, pp. 20-22. Records summer and fall (return) migra- 

 tion and describes true sexes. Suggests that alternate host 

 plant may be grass. 



1901. Schizoneura rileyi, Hunter. Aphid, of N. A., p. 84. Bibliography 



in part. 



1902. Schizoneura americana, Weed, C. M. Bui. No. 90. N. H. Agr. 



Exp. Sta. p. 2)7- Brief account and photograph of curled leaf. 



1902. Schizoneura americana. Cook, M. T. Galls and Insects Produc- 

 ing Them. Ohio Naturalist. Vol. II, No. 7, p. 265 and Fig. 12. 

 Discussion of structure of gall. 



1904. Schizoneura americana, Sanborn, C. E. Kansas Aphid, pp. 25-26, 

 Plate VI, Fig. 37. Description of winged form and record of 

 migration from elm. 



1904. Schizoneura lanigera, Sanborn, C. E. Kansas Aphid, pp. 26-27. 

 Fig. 36. 



1904. Schizoneura americana. Cook, M. T. Galls and Insects Pro- 

 ducing Them. The Ohio Naturalist, Vol. IV, .No. 6. 



