Walker, Francis, 1847, Characters of undescribed Chalcidites collected in North America by E. Doubleday Esq., and now in the British Museum (Continued from vol. xix. p. 398.)

Walker, Francis, 1847, Characters of undescribed Chalcidites collected in North America by E. Doubleday Esq., and now in the British Museum (Continued from vol. xix. p. 398.), Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the ' Magazine of Botany and Zoology', and of Louden and Charlesworth's ' Magazine of Natural History' 20, No. 130, pp. 19-29