Manchester Memoirs, Vol. xlvii. (1903), No. 14, XIV-Hymenoptera Orientalia, or Contributions to the Knowledge of the Hymenoptera of the Oriental Zoological Region. Part IX. The Hymenoptera of the Khasia Hills. Part II. Section 2. By P. Cameron. \^Communicated by /. Cosmo Melvill, ALA., F.L.S.^ Received October lotli , read October jist, iSgg. CRYPTINyE. SiLSlLA, gen. 710V. Areolet small, narrow, twice longer than broad ; the transverse cubital nervures are faint ; the recurrent nervure is received in the middle ; the transverse median nervure is received shortly behind the transverse basal. Eyes large, parallel, reaching near to the base of the mandibles. Clypeus roundly convex, its apex transverse in the middle. Mandibles with two large apical teeth. Parapsidal furrows deep ; the base of the thorax transverse ; its sides tuberculate. Metathorax longish ; the metanotum with a gradually rounded slope ; closely punctured throughout ; there is only one transverse keel ; its spiracles about three times longer than broad, rounded at the base and apex. Legs normal ; the hinder tarsi spinose. Petiole not much longer than the second segment, becoming gradually wider (but not much) towards the apex ; the spiracles are placed at the base of the apical third ; its curve is not very distinct ; the gastrocceli are shallow, triangu-larly narrowed at the base ; the apical segment obliquely July joth, igoj.