The following notes may be regarded chiefly as materials towards the study of the geographical distribution of this group of the bloodsucking midges, which are of so much interest from a medical standpoint. For the opportunity of examining the very large series of specimens (570) herein recorded, I have to thank Dr. Guy A.K. Marshall, Director of the Imperial Bureau of Entomology, who sent the collections made by Drs. A. Ingram and J.W. Scott Macfie, in the Gold Coast ; and also that formed by Capt. J. Waterston, R.A.M.C., in Macedonia. I tender my thanks also to Capt. P.A. Buxton, R.A.M.C., for the collections made by him at Amara, Mesopotama ; to Capt. H.W. Leatham, R.A.M.C., for examples from Basra ; and to Major J.A. Sinton, V.C., I.M.S., for the specimens which he collected in N.E. Persia, under exceptionally difficult circumstances, and also for the long series taken by him in the N.W. Frontier Province of India.