XX. On some cases of Dimorphism and Polymorphism among Palœarctic Lepidoptera
Published in Transactions of The Royal Entomological Society of London, in 1891, in volume 39, pages 497-502
Date published:1891
Published in Transactions of The Royal Entomological Society of London, in 1891, in volume 39, pages 497-502
Date published:1891