82 Cameron, Hymenoptera Orientalia. 



closely striated; the apical segment smooth. In the centre 

 of the base of the second segment is a raised keel, which 

 becomes gradually narrowed to a sharp point, finely and 

 closely punctured at the base ; the rest much more strongly 

 and irregularly ; the lateral depression on the second seg- 

 ment, wide, oblique, shallow ; on the third it is shallower ; 

 on the fourth shorter, curved, not so oblique. 



Spinaria albiventris, sp. nov. 



Rufo-fulva ; metathorace pedibusque posticis nigris ; 

 abdomine albo, supra late nigro-maculato ; alis fulvo- 

 fumatis. ? . 



Long. 12 mm. 



Head small, shining, uniformly rufo-fulvous ; smooth, 

 the vertex with a few fuscous hairs ; the face above with 

 long fuscous, below with some longer fulvous, hairs ; the 

 face projecting in the middle, with an elongated fovea 

 above ; the palpi are paler ; the base of the mandibles 

 closely punctured ; the teeth black. Thorax smooth and 

 shining. In the centre of the pronotum above is a large 

 curved spine, sharply pointed at the apex, which reaches 

 to the top of the occiput ; in front of this tooth the pro- 

 notum is expanded; the expansion widest near the head; 

 the sides slightly curved, distinctly margined ; the point 

 curved inwardly towards the middle ; above it is keeled 

 down the middle, depressed on either side of this central 

 keel. The middle lobe of the mesonotum is largely raised 

 and separated from the lateral by wide and deep furrows; 

 at its apex in the centre is a stout Y-shaped keel. The 

 scutellar keels stout; and there is, between, in the middle, 

 a longitudinal one of the same thickness ; on the 

 scutellum behind is a central and four lateral stout keels ; 

 the post-scutellum raised, smooth, triangular ; in front of 

 it are two stout, irregular projections ; at the sides of these 



