H. S. K.  Donisthorpe, The guests of British ants: their habits and life-histories. London: George Routledge & Sons, 1927, p. xiii + 244 pp.

C. W.  Johnson, Part I. The insect fauna with references to the flora and other biological features. Philadelphia: The Wistar Institute of Anatomy and Biology, 1927, p. 247 pp.