Manchester Memoirs, Vol. liv. (1909), No. %. 



Fig. I. 



A. Nest with 4 young. 



B. Inhabited nest, but empty when fonnd. 



a, Uy a, exits from A. 



b, b, „ „ B. 



Lou 



Fi<r. II. {a). 



N. Nest with 4 young. 



D. Entrance to Downshaft. 



e, e, e, Exits from nest. 



