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From Robert McLachlan 21 February 1868
Summary
On numerical proportions of sexes in insects; coloration. Dimorphism in dragonflies (Agrion) in which usual coloration is reversed in sexes [see Descent 1: 362–4].
Wallace seems to ride his hobby too hard.
| Author: | Robert McLachlan |
| Addressee: | Charles Robert Darwin |
| Date: | 21 Feb 1868 |
| Classmark: | DAR 86: A8–9, DAR 82: A88–9 |
| Letter no: | DCP-LETT-5910 |
