4 LIST OF CIRCULARS 1 TO 100. 
No. 38. The squash-vine borer ( Melittia satyriniformis Hbn.). By F. H. Chittenden. 
pp. 6, figs. 2. April 22, 1899. ’ 
Same, revised edition. pp. 6, figs. 2. November 19, 1903. 
Same, second revise. pp. 6, figs. 2. Issued September 3, 1908. 
No. 39. The common squash bug (Anasa tristis De G.). By F. H. Chittenden. pp. 
5, figs. 3. May 5, 1899. 
Same, revised edition. pp. 5, figs. 3. March 23, 1905. 
Same, second revise. pp. 5, figs. 3. Issued July 28, 1908. 
No. 40. How to distinguish the different mosquitoes of North America. By L. O. 
Howard (with ‘‘Synoptic tables of the North American mosquitoes,’’ by D. W. 
Coquillett). pp. 8, figs. 3. February 20, 1900. 
No. 41. Regulations of foreign governments regarding importation of American plants, 
trees, and fruits. By L.O. Howard. pp. 4. August 24, 1900. 
No. 42. How to control the San Jose scale. By C. L. Marlatt. pp. 6. October 22, 
1900. 
Same, revised. pp.6. May 17, 1902. 
Same, second edition. May 26, 1902. 
Same, third edition. April 6, 1903. 
Same, fourth edition. pp. 8. March 10, 1906. 
Same, fitth edition. pp. 7. [March 31] 1909. 
No. 43. The destructive green pea louse (Nectarophora destructor Johns.). By F. H. 
Chittenden. pp. 8, figs. 3. May 23, 1901. 
Same, second edition {entitled ‘‘The pea aphis (Macrosiphum pisi Kalt.)”]. pp. 10, 
figs. 7. Issued February 25, 1909. 
No. 44. The periodical cicada in 1902. By W. D. Hunter. pp. 4, figs. 2. March 18, 
1902. 
No. 45. A new nomenclature for the broods of the periodical cicada. By C. L. Marlatt. 
pp. 8. May 1, 1902. 
No. 46. Hydrocyanic-acid gas against household insects. By L.O.Howard. pp. 6. 
June 22, 1902. 
Same, revised edition. pp. 7. Issued February 20, 1907. Revised by C. L. Marlatt. 
No. 47. The bedbug (Cimezx lectularius Linn.). By C. L. Marlatt. pp. 8, figs. 3. 
June 15, 1902. 
Same, revised edition. pp. 8, figs. 3. Issued February 26, 1907. 
No. 48. The house centipede (Scutigera forceps Raf.). By C. L. Marlatt. pp. 4, figs. 
2. June 10, 1902. 
No. 49. The silver fish (Lepisma saccharina Linn.). By C. L. Marlatt. pp. 4, figs. 2. 
June 20, 1902. 
No. 50. The white ant (Termes flavipes Koll.). By C. L. Marlatt. pp. 8, figs. 4. 
June 30, 1902. 
Same, revised edition. pp. 8, figs. 4. Issued January 27, 1908. 
No. 51. Cockroaches. By C. L. Marlatt. pp. 15, figs. 5. June 23, 1902. 
Same, revised. pp. 14, figs. 5. Issued June 23, 1908. 
No. 52. The lime, sulphur, and salt wash. By C. L. Marlatt. pp. 8. February 20, 
1903. 
Same, second edition. March 18, 1904. f 
No. 53. The yellow-winged locust (Camnula pellucida Scudd.). By C. B. Simpson. 
pp. 3, fig. 1. May 12, 1903. 
No. 54. The peach-tree borer (Sannina evitiosa Say). By C. L. Marlatt. pp. 6, fig. 1. 
October 19, 1903. 
No. 55. Powder-post injury to seasoned wood products. By A. D. Hopkins. pp. 5, 
fig. 1. November 20, 1903. 
No. 56. The most important step in the cultural system of controlling the boll weevil. 
By W. D. Hunter. pp. 7. October 10, 1904. (Superseded by No. 95.) 
