Two more parts were published in the "Annals and Magazine of Natural History" under the title "Descriptions of British chalcidites". Following the Balliére volumes chalcids were described in only one more volume of "Annals and Magazine of Natural History" and that of 1846. Thereafter, the British Museum, Walkers employer, published, Walker's 100 page List of the specimens of hymenopterous insects in the collection of the British Museum. Printed by order of the Trustees, London. vi + 237 pp. Part I-Chalcidites ;100 pages.