1088 WALTER H. WELLHOUSE 



LITERATURE CITED 



BAKER, A. C. The woolly apple aphis. U. S. Agr. Dept. Kept. 101 : 

 1-55. 1915. 



CHAMBERS, V. T. [Blastodacna curvilineella] G.I curvilineella. N. sp. 

 In Micro-Lepidoptera. Canad. ent, 4 : 172-173. 1872. 



[Blastodacna curvilineella] G. bicristatella. N. sp. In Tineina 



from Canada: Canad. ent. 7:210. 1875. 



CUSHMAN, R. A. The native food-plants of the apple red-bugs. Ent. 

 Soc. Washington. Proc. 18:196. 1916. 



DIETZ, WILLIAM G. A. nebulosus Lee. In Revision of the genera and 

 species of Anthonomini inhabiting North America. Amer. Ent. Soc. 

 Trans. 18:203-204. 1891. 



FELT, EPHRAIM PORTER. Wild thorn. In Insects affecting park and 

 woodland trees. New York State Mus. Memoir 8 2 : 734-735. 1906. 



GIBSON, EDMUND H. Corythucha bellula new species. In The c,enus 

 Corythucha Stal. Amer. Ent. Soc. Trans. 44:93-94. 1918. 



HODGKISS, H. E. Ceresa taurina Fitch. In The apple and pear membra- 

 cids. New York (Geneva) Agr. Exp. Sta. Tech. bul. 17: 100-105. 1910. 



KALTENBACH, J. H. Die Pflanzenfeinde aus der Klasse der Insekten, 

 p. 1-848. (Reference on p. 207-213.) 1872. 



KNUTH, PAUL. Crataegus L. In Handbook of flower pollination, 2:385- 

 388. (Translated by J. R. Ainsworth Davis.) 1908. 



LECONTE, JOHN L. A. nebulosus, n. sp. In The Rhynchophora of 

 America, north of Mexico. Amer. Philosoph. Soc. Proc. 15 : 197. 1876. 



MORRILL, AUSTIN W. Notes on the immature stages of some tingitids 

 of the genus Corythuca. Psyche 10:127-134. 1903. 



PACKARD, ALPHEUS S. Insects affecting the wild thorn. In Fifth 

 report of the United States Entomological Commission on insects 

 injurious to forest and shade trees, p. 532-537. 1890. 



PIERCE, W. DWIGHT. The insect enemies of the cotton boll weevil. 

 U. S. Ent. Bur. Bul. 100: 1-99. 1912. 



