42 BULLETIN 847, 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. 



(8) 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. 



ADDITIONAL COPIES 



OF THIS PUBLICATION MAY BE PROCURED FROM 



THE SUPERINTENDENT OF DOCUMENTS 



GOVERNMENT PRINTING OFFICE 



•WASHINGTON, D. C. 



AT 



15 CENTS PER COPY 



