The approximately 3,700 color and black and white drawings were collected and drawn by John Lawrence LeConte, with two in the first volume are by Titian R. Peale, but most are likely by John Abbot. The previous description noted that there are some drawings by John Abbot, and that most were likely by John Lawrence Le Conte. However, John V. Calhoun has shown extensive evidence that most of the drawings are by John Abbot (John Abbot's "Lost" Drawings for John E. LeConte in the American Philosophical Society Library, Philadelphia. Journal of the Lepidopterists' Society 60(4), 2006, 211-217). The contents of the collection: 1. Coleoptera. 654 figures. 2. Diptera, Hemiptera, and Lepidoptera. 564 figures. 3. Coleoptera. 698 figures. 4. Coleoptera and Hymenoptera. 228 figures. 5. Coleoptera. 657 figures. 6. Hymenoptera and Diptera. 234 figures 7. Diptera. 304 figures. 8. Hemiptera, Araneina, Myripoda. 356 figures

Consists of material chiefly on natural history, shells, and insects, including miscellaneous notes on conchology by Say; photostats of 6 letters from Say to Jacob Gilliams, 1819-1829, from Morristown, New Jersey; and a biographical note on Say. The drawings and impressions of shells are by Mrs. Lucy Way Sistaire Say, prepared for W. G. Binney's edition of Say's complete works on conchology, 1858; also Mrs. Say's refutation of what she considered an unfair attack in George Ord's memoir of Say. Correspondents include André Etienne Férussac, Arthur F. Gray, John Lawrence LeConte, and Charles W. Short. An additional item is a memorial volume (ca. 150 pp.), including a family genealogy and land surveys in watercolor (B Sa95f).

This diverse collection includes correspondence, field notes, lecture and meeting notes, publication material, drawings, and lantern slides. It documents Weber's professional career as an internationally known myrmecologist, or ant scientist, and his wider ranging interests in entomology and ecology. There are class and lab notes for his educational period at Harvard University (A.M. 1933; Ph.D. 1935), and substantial documentation on his primary academic career at Swarthmore College (1947-1974; includes teaching records, data on the Biology Dept. and the College). His field notes, 1930s-1970s (ca. 3 lin. ft.), contain detailed observations of the many scientific expeditions he was a member of, including trips to: West Indies, 1933-1936; Colombia, 1938; Sudan, Uganda, and Kenya, 1939. He also participated in numerous American Museum of Natural History expeditions: Central Africa, 1948; Middle East, 1950, 1952; and Tropical America, 1954. There are data for his time as visiting professor at the University of Baghdad, Iraq, 1950-1952, and his period as Scientific Attaché, Buenos Aires, for the U. S. Dept. of State, 1960-1962. Weber's contributions to polar scientific studies can be studied through his files of the National Academy of Sciences Committee on Polar Research, 1958-1960 (he was on the panel on biological and medical science), as well as many numerous miscellaneous files on polar research. There is substantial material on the Entomological Society of America, and on such local ecological groups as the Chester-Ridley-Crum Watersheds Assoc., Delaware County, Pennsylvania.