CIRCULARS, SECOND SERIES. LE 
No. 40. Second print. pp. 8, figs. 3. [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. 
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. Out of print. 
Same, fifth 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. Out of print. 
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. Out of print. 
No. 45. A new nomenclature for the broods of the periodical cicada. By ©. L. Marlatt. 
pp. 8. May 1, 1902. Out of print. 
No. 46. Hydrocyanic-acid gas against household insects. By L. O. Howard. pp. 6. 
June 22, 1902. Out of print. 
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. Out of print. 
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. Out of print. 
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. Out of 
print. 
Same, revised edition. pp. 14, figs.5. Issued June 23, 1908. 
No. 52. The lime, sulphur, and salt wash. By ©. L. Marlatt. pp. 8. February 20, 
1903. Out of print. 
Same, second edition. March 18, 1904. Out of print. 
No. 53. The yellow-winged locust (Camnula pellucida Scudd.). By ©, B. Simpson. 
pp. 3, fig. 1. May 12, 1903. 
No. 54. The peach-tree borer (Sannina exitiosa 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.) 
No. 57. The greenhouse white fly (Aleyrodes vaporariorum Westw.). By A. W. Morrill. 
pp. 9, fig.1. February 15, 1905. 
No. 58. Report on the gypsy moth and the brown-tail moth, July, 1904. By C. L. 
Marlatt. pp. 12, pl.1,map1. March 21, 1905. Out of print. 
No. 59. The corn root-worms. By F.H. Chittenden. pp. 8, figs.3. March 23, 1905. 
No. 60. The imported cabbage worm (Pontia rape Linn.). By F. H. Chittenden. 
pp. 8, figs.6. April 28, 1905. 
{Cir. 76] 
