| Introduction | [xi] |
| Bibliography | [1] |
| Descriptions of genera and species of fossil butterflies | |
| Neorinopis | [9] |
| 1. Neorinopis sepulta | [14] |
| Lethites | [34] |
| 2. Lethites Reynesii | [37] |
| Eugonia | [40] |
| 3. Eugonia atava | [41] |
| Mylothrites | [44] |
| 4. Mylothrites Pluto | [45] |
| Coliates | [51] |
| 5. Coliates Proserpina | [52] |
| Pontia | [53] |
| 6. Pontia Freyeri | [54] |
| Thaites | [57] |
| 7. Thaites Ruminiana | [60] |
| Thanatites | [62] |
| 8. Thanatites vetula | [63] |
| Pamphilites | [66] |
| 9. Pamphilites abdita | [68] |
| Comparative age of fossil butterflies | [70] |
| Probable food plants of tertiary Caterpillars | [71] |
| Present distribution of butterflies most nearly allied to fossil species | [76] |
| General Résumé, with notice of undetermined forms | [83] |
| Fossil Insects erroneously referred to butterflies | [88] |
| Explanation of the plates and wood cuts | [97] |