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. 



