[145] COLLECTING AND PRESERVING INSECTS RILEY. 



1" Special Ebpoet, No. 11. — The Silkworm ; being a brief Manual of 

 Instructions for the Production of Silk. Prepared, by direction of 

 the Commissioner of Agriculture, by 0. V. Eiley, M. A., Ph. D., 

 Entomologist. (First ed., 1879; fifth ed., 1885.) [pp. 37, figs. 8.] 



* Special Eeport, No. 35. — Eeport on Insects injurious to Sugar Cane. 



Prepared, under Direction of the Commissioner of Agriculture, by 

 J. Henry Comstock, Entomologist. (1881.) [pp. 11, figs. 3.] 



* Division of Entomology. — Insects Affecting the Orange. — 



Eeport on the Insects affecting the Culture of the Orange and other 

 plants of the Citrus Family, with practical Suggestions for their 

 Control or Extermination. By H. G. Hubbard. (1885.) [pp.x+227, 

 figs. 95, plates XIY.] 



* Special Eeport. — Catalogue of the Exhibit of Economic Entomology 



at the World's Industrial and Cotton Centennial Exposition, New 

 Orleans, 1884-'85. (1888.) [pp. 95.] 



Special Bulletin. — The Horn Fly (Hsematobia serrata), being an 

 account of its Life-history and the means to be used against it. 

 By C. Y. Eiley and L. O. Howard. (Eeprinted from Insect Life, 

 Vol. II, No. 4, October 1889.) (1889.) [pp. 11, figs. 5.] 



Bibliography of the more important Contributions to Amer- 

 ican Economic Entomology. By Samuel Henshaw. Parts I, 

 II, and III. The more important writings of Benjamin Dann 

 Walsh and Charles Valentine Eiley, Washington, 1890. 



HOW TO OBTAIN ENTOMOLOGICAL BOOKS AND 

 PAMPHLETS. 



Comparatively few of the works treating of the classification of North 

 American insects have been published as separate books ; but such as 

 have been so published, if of comparatively recent date, can be obtained 

 through the regular book trade. By far the greater number of the 

 monographs and synopses mentioned in the preceding pages have 

 been published in scientific periodicals and in the proceedings or 

 transactions of scientific societies. These may be obtained either 

 through the societies or through the publishers ; but single volumes of 

 transactions or proceedings, and more especially single papers, are 

 seldom sold, and the older volumes are liable to be out of print. More- 

 over, the expense attending the purchase of all of the periodicals con- 

 taining the publications on a given order of insects will be so great as 

 to put them beyond the reach of most entomologists. The custom of 

 placing at the disx)osal of authors a number of separate copies of their 

 papers overcomes this difficulty to some extent and creates a small sup- 

 ply. Thus it often happens that a person interested can obtain a copy 

 of a scientific paper by addressing the author personally. Many of 



* Out of print. 



t BuU. No. 9 of the Division of Entomology covers this subject. 

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