These records are the official incoming correspondence of the Division of Insects (outgoing correspondence for part of the period is included in record unit 139). Included is correspondence from entomologists and others requesting determinations, loans of specimens, or regarding purchase or gift of specimens for the museum; and correspondence between entomologists regarding determinations or other scientific matters, and publications of findings.
Fairly extensive correspondence exists for the following entomologists: Charles Fuller Baker, Elmer Darwin Ball, William Beutenmuller, Frederick Blanchard, J. Chester Bradley, Frank Hurlburt Chittenden, John Henry Comstock, Charles Dury, Harrison Gray Dyer, Henry Edwards, Ephraim Porter Felt, Charles Henry Fernald, Henry Torsey Fernald, James Fletcher, William Hague Harrison, Charles A. Hart, Samuel Henshaw, William W. Hill, William Jacob Holland, Leland Ossian Howard, Henry Herbert Lyman, Alexander Dyar MacGillivray, James Abram Garfield Rehn, Charles Valentine Riley, Samuel H. Scudder, David Sharp, Henry Skinner, Annie Trumball Slosson, John Bernhard Smith, W. N. Tallant, and Lucien M. Underwood. Important items are indicated by a asterisk. Some letters are filed by the name of the person referred to rather than by correspondent.
Information regarding administration of the Division of Insects is found in the folders of W. V. Cox, R. I. Geare, George Brown Goode. F. W. Hodge, Richard Rathbun, William de C. Ravenel, Charles Valentine Riley, John Bernhard Smith, and Frederick William True. Riley's reports for 1886-1888 are filed under "Reports."