14 E. Takaliashi 



2, pp. 235-295. 

 ITavilaud, M. U. 1918-19 On the life-history and bionomics of Jft/zin, ri/iis L. 



Proo. Royal Soc Ediuburgli, xxxix, 1 (No. 8), pp. 



78-112 

 Mathcson, K. 1919. A study of plant lice injuring tlie foliage and fruit of 



the apple. Cornell Univ. Agr. Expt. St., Mem. 24. 

 Mouzen, H. 1922. Life history of Eriosoma laniyera Hausm. Jl. Plant 



Protection, ix, p. 472 (Japanese). 

 Pergande, T. 1901. Two species of plant-lice inhabiting both the witch- 



hazel and the bircli. U. S. Dept. Agr., Bureau 



Ent., Technical Ser. 9, 

 Phillips, W. Ct. and Davis. J. J. 1912. Studies on a new species of Toxoptera. 



U. S. Dept. Agr. Bureau of Ent., Technical Scr., 



2), pt. 1. 

 Takahashi, R. 1921. On the nymphs of Aphidinae. Proc. Ent. Soc. 



Washington, xxvi, pp. 1-11. 

 Tullgren, A. 1909. Aphidologische Studicn. Arkiv for Zoolog., v, 4, pp. 



1-190. 



