6 LIST OF CIRCULARS 1 TO 100. 
No. 80. The melon aphis (Aphis gossypu Glov.). By F. H. Chittenden. pp. 16, 
figs. 6. November 14, 1906. 
No. 81. The aphides affecting the apple. By A. L. Quaintance. pp. 10, figs. 8. 
Issued March 9, 1907. 
No. 82. Pinhole injury to girdled cypress in the South Atlantic and Gulf States. 
By A. D. Hopkins. pp. 4, fig. 1. Issued January 2, 1907. 
No. 83. The locust borer [Cyllene robinix Forst.] and methods for its control. By 
A.D. Hopkins. pp. 8, figs. 4. Issued February 19, 1907. 
No. 84. The grasshopper problem and alfalfa culture. By F. M. Webster. pp. 10, 
figs. 8. Issued April 6, 1907. 
No. 85. The spring grain-aphis (Toxoptera graminum Rond.). By F. M. Webster. 
pp. 7, figs. 3. Issued March 29, 1907. (See also No. 93.) 
No. 86. The corn leaf-aphis [Aphis maidis Fitch] and corn root-aphis [Aphis maidi- 
radicis Forbes]. By F. M. Webster. pp. 13, figs. 4. Issued May 6, 1907. 
No. 87. The Colorado potato beetle (Leptinotarsa decemlineata Say). By F. H. Chit- 
tenden. pp. 15, figs. 6. Issued June 3, 1907. 
No. 88. The terrapin scale (Hulecanium nigrofasciatum Pergande). By J.G. Sanders. 
pp. 4, figs. 3. Issued May 14, 1907. 
No. 89. The periodical cicada in 1907 (Tibicen septendecim L., race tredecim Walsh- 
Riley). By C. L. Marlatt. pp. 4, figs. 3. Issued May 14, 1907. 
No. 90. The white-pine weevil [ Pissodes strobi Peck]. By A. D. Hopkins. pp. 8, figs 
6. Issued June 18, 1907. 
No. 91. Note on the occurrence of the North American fever tick [(Boophilus) Margaro- 
pus annulatus Say] on sheep. By W. D. Hunter. pp. 3. Issued July 3, 1907. 
No. 92. Mites and lice on poultry. By Nathan Banks. pp. 8, figs. 6. Issued Sep- 
tember 25, 1907. 
No. 93. The spring grain-aphis or so-called ‘‘green bug” ( Toxoptera graminum Rond.). 
By F. M. Webster. pp. 18, figs. 7. Issued August 22, 1907. 
Same, revised. pp. 22, figs. 10. Issued June 23, 1999. 
No. 94. The cause of American foul brood [Bacillus larve]. By G. F. White. pp. 4. 
Issued July 29, 1907. 
No. 95. (Revision of Circular No. 56.) The most important step in the control of the 
boll weevil [Anthonomus grandis Boh.]. By W.D.Hunter. pp.8. Issued October 
3, 1907. ! 
Same, revised edition. pp. 8. Issued September 21, 1908. 
Same, French edition. pp.11. Issued January 21, 1909. 
No. 96. The catalpa sphinx (Ceratomia catalpe Bdy.). By L.O. Howard and F. H. 
Chittenden. pp. 7, figs. 2. Issued December 16, 1907. 
No. 97. The bagworm (Thyridopteryx ephemerxformis Haw.). By L. O. Howard and 
F. H. Chittenden. pp. 10, figs. 11. Issued February 6, 1908. 
No. 98. The apple-tree tent caterpillar (Malacosoma americana Fab.). By A. L. 
Quaintance. pp. 8, figs. 4. Issued January 28, 1908. 
No. 99. The nut weevils. By F. H. Chittenden. pp. 15, figs. 14. Issued March 6, 
1908. 
No. 100. An index to Circulars 1 to 100 of the Bureau of Entomology. By Rolla P. 
Currie and Andrew N. Caudell. pp. i-ii, 1-49. Issued October —, 1911. 
