Although it is now some eight years since Neumann described Argas brumpti from specimens collected by Dr. Brumpt in Somaliland, comparatively little is known of its biology. Dr. Brumpt found the ticks living in dust under ledges of rock in the dry bed of a stream frequented by porcupines (1). In British East Africa they havebeen taken by Mr. Scholefield on the Yatta Plains (2) and in the Anglo-EgyptianSudan they have been recorded by the writer as occurring at Gebelein (3). In 1913 Mr. Cunliffe, working in England, obtained eggs and larvae from specimens sent him from British East Africa, but failed to rear the latter (2). Figures of the adult female appear in the Monograph of the Ixodoidea by Nuttall, Warburton, Cooper and Robinson. The egg and unfed larva have been figured and described by Mr. Cunliffe in The Journal of Parasitology (2).