14 PUBLICATIONS OF BUREAU OF ENTOMOLOGY. 
No. 29. The fruit-tree bark-beetle (Scolytus rugulosus Ratz.). By F. H. Chit- 
tenden. pp. 8, figs. 5. March 25, 1898. Out of print. 
Same, revised edition. March 25, 1903. 
No. 30. The periodical cicada in 1898. By E. A. Schwarz. pp. 3. April 1, 
1898. Out of print. 
No. 31. The striped cucumber beetle (Diabrotica vittata Fab.). By F. H. 
Chittenden. pp. 7, figs. 2. April 26, 1898. Out of print. 
Same, revised edition. pp. 6, figs. 2. June 9, 1903. 
No. 32. The larger apple-tree borers. By F. H. Chittenden. pp. 12, figs. 5. 
July 1, 1898. Out of print. 
Same, revised edition. pp. 12, figs. 3. August 30, 1902. Out of print. 
Same, second revise. pp. 11, figs. 3. April 8, 1905. Out of print. 
Same, third revise. pp. 11, figs. 3. Issued December 10, 1907. 
No. 33. Remedial work against the Mexican cotton-boll weevil. By L. O. 
Howard. pp. 6. July 1, 1898. (Supplementary to circulars 18 and 27.) 
Out of print. 
No. 34. House ants (Monomorium pharaonis et al.). By C. L. Marlatt. pp. 4, 
figs. 8. July 6, 1898. Out of print. 
Same, revise. pp. 4, figs. 8. Issued June 12, 1907. 
No. 35. House flies (Musca domestica et al.). By L. O. Howard. pp. §, figs. 6. 
July 11, 1898. Out of print. (Superseded by No. 71.) 
No. 36. The true clothes moths (Tinea pellionella et al.). By C. L. Marlatt. 
pp. 8, figs. 3. July 18, 1898. Out of print. 
Same, revise. pp. 8, figs. 38. Issued January 15, 1908. 
No. 37. The use of hydrocyanic-acid gas for fumigating greenhouses and cold 
frames. By Albert F. Woods and P. H. Dorsett. pp. 10, figs. 3. January 
10, 1899. Out of print. 
Same, corrected print. (Compare page 8.) pp. 10, figs. 8. January 10, 1899. 
Out of print. 
Same, revised edition. pp. 10, figs. 8. October 2, 1903. Out of print. 
No. 38. The squash-vine borer (Melittia satyriniformis Ubn.). By F. H. 
Chittenden. pp. 6, figs. 2. April 22, 1899. Out of print. 
Same, revised edition. pp. 6, figs. 2. November 19, 1905. 
No. 39. The common squash bug (Anasa tristis De G.). By F. H. Chittenden. 
pp. 5, figs. 3. May 5, 1899. Out of print. 
Same, revised edition. pp. 5, figs. 38. Mareh 25, 1905. 
No. 40. How to distinguish the different mosquitoes of North America. By L. O. 
Howard (with synoptical tables of the North American mosquitoes; by 
D. W. Coquillett). pp. 8, figs. 3. February 20, 1900. Out of print. 
Same, second print. pp. 8, figs. 8. [1901.] Out of print. 
No. 41. Regulations of foreign governments regarding importation of American 
plants, trees, and fruits. By L. O. Howard. pp. 4. August 24, 1900. Out 
of print. 
No. 42. How to control the San Jose scale. By C. L. Marlatt. pp. 6. October 
22, 1900. Out of print. 
Same, revised. pp. 6. May 17, 1902. Out of print. 
Same, second edition. May 26, 1902. Out of print. 
Same, third edition. April 6, 1903. Out of print. 
Same, fourth edition. pp. 8. March 10, 1906. 
No. 43. The destructive green pea louse (Nectarophora destructor Jobns.). By 
F. H. Chittenden. pp. 8, figs. 3. May 238, 1901. 
[Cir. 76] 
