42 BULLETIN 84*7, U. S. DEPARTMENT OF AGRICULTURE. 



(7) Chittenden, F. H. 



1907. The larger apple-tree borers. U. S. Dept. Agr. Bur. Ent. Circ. 

 32, 3rd revise. 11 p., illus. 

 (S) Saunders, W. 



1909. The roundheaded apple-tree borer. In Insects injurious to 

 fruits, p. 16-19, fig. 3. 



(9) Patch, E. M., and Johannsen, O. A. 



1910. Apple-tree insects of ' Maine. Maine Agr. Exp. Sta. [383-6- 

 10] Univ. of Me. 68 p.. illus. 



(10) Smith, R. I., and Stevens, F. L. 



1910. Insects and fungous diseases of apple and pear. N. C. Agr. 

 Exp. Sta. Bui. 206. 126 p., illus. - 



(11) O'Kane, W. C. 



1912. The roundheaded apple-tree borer. In Injurious insects, p. 

 235-236, figs. 303-304. 



(12) Sanderson, E. D. 



1912. The roundheaded apple-tree borer. In Insect pests of farm, 

 garden, and orchard, p. 588-591, figs. 444-445. 



(13) Slingerland, M. V., and Crosby, C. R. 



1914. The roundheaded apple-tree borer. In Manual of fruit insects, 

 p. 185-193, figs. 180-184. 



(14) Becker, G. G. 



1918. The roundheaded apple-tree borer. Univ. of Kansas Agr. Exp. 

 Sta. Bui. 146. Technical. 92 p., illus., pi. 



(15) Lutz, F. E. 



1918. Field book of insects. 509 p., illus. 



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