O. W.  Richards and Hereford, G. V. B., ?Insects found associated with cacao, species and dried fruits in London warehouses.?, Annals of Applied Biology, vol. 14, pp. 367-395, 1930.

O. W.  Richards and Thomson, W. S., ?A new British braconid.?, Entomologist's Monthly Magazine, vol. 64, p. 187, 1928.

O. W.  Richards, ?Some breeding records of Hymenoptera. Assembling of an Ichneumon (Hym.).?, Journal of the Society for British Entomology, vol. 1, pp. 81-86, 1935.

O. W.  Richards, ?Two new parasites of aculeata Hymenoptera from Trinidad.?, Stylops, vol. 4, pp. 131-133, 1935.