It is remarkable that the butterflies which have been found in a fossil state show a very close affinity to genera existing at the present time, for the most part, in the warmer regions of the earth. Though ages have elapsed since their remains were embedded in the mud which became transformed into stone, the processes of life have not wrought any marked structural changes in the centuries which have fled. This fixity of type is certainly remarkable in creatures so lowly in their organization. +--------------------------------------------------------------+ | | | EXPLANATION OF PLATE XXIV | | | | 1. _Pyrrhanæa andria_, Scudder, ♀. | | 2. _Pyrrhanæa morrisoni_, Edwards, ♀. | | 3. _Pyrrhanæa portia_, Fabricius, ♂. | | 4. _Ageronia feronia_, Linnæus, ♂. | | 5. _Ageronia fornax_, Hübner, ♂, | | _under side_. | | 6. _Victorina steneles_, Linnæus, ♂. | | 7. _Cystineura amymone_, Ménétries, ♂. | | 8. _Synchloë crocale_, Edwards, ♂, | | _under side_. | | 9. _Synchloë crocale_, Edwards, ♂. | | 10. _Eurema lethe_, Fabricius, ♂. | | | | [Illustration PLATE XXIV.] | +--------------------------------------------------------------+ SUBFAMILY SATYRINÆ (THE SATYRS) "Aught unsavory or unclean Hath my insect never seen; But violets and bilberry bells, Maple-sap and daffodils, Grass with green flag half-mast high, Succory to match the sky, Columbine with horn of honey, Scented fern and agrimony, Clover, catch-fly, adder's-tongue And brier-roses dwelt among." EMERSON.