A small but extremely interesting collection of Ticks and other Arachnids was brought over from Ceylon by Mr C. C. Dobell in 1909, and was supplemented by a few tubes sent subsequently by Dr A. Willey from the same island. While these were being examined, a large consignment of ticks was received from the Indian Museum, Calcutta, being in fact the whole collection of the museum. The two collections may be conveniently dealt with in the present paper, which will give a list of the species they respectively contain, and a description of the new forms—five new species and three new varieties—which they jointly afford.