]\Tanc]tcstcr Memoirs, Vol. xih'. (\c)Oo), No. |.%. 95 



Legs stout ; the tibi.u and tarsi covered dense!)' with 

 short thick hair; the outer fork of the claws is long and 

 curved ; the basal one shorter and thicker. 



Comes nearest to Microdns ; may be known from it 

 b)' the scjuare second cubital cellule ; by the second 

 transverse cubital nervure emitting a short thick branch ; 

 and by the mesonotum being more distinctly and deeply 

 trilobate. The transverse probrachial nervure is inter- 

 stitial ; the recurrent nervure is received shortly in front 

 of the first transverse cubital. 



Oreba purpurea, sp. nov. 



Purpurea, facie coerulea ; anteiuiis tarsisqnc uigris ; 

 alis fusco-violaceis. $ . 



Long. 13 mm. 



Antenna,' not much longer than tlic head and thorax ; 

 distincll}' tapering towards the apex, thickly covered with 

 stiff black pubescence. Face and clypeus indigo-blue, 

 spotted at the sides and top with black ; the face carinate ; 

 the sides of the keel broad, oblique ; the sides and upper 

 part thickK' covered with short white pubescence; the 

 clypeal foveas large, deep. Mandibles black, shining. 

 Thorax bright purple, shining ; the pleur.e and meta- 

 notum sparsely covered with white hair ; the mesonotum 

 punctured, but not closely ; its base transverse, rounded 

 laterally ; the middle lobe is large, its apex triangular, 

 obliquely depressed ; the sides of the lateral lobes at the 

 apex have also an oblique slope ; there are two straight 

 furrows in the centre of the middle lobe which reach to 

 the base of the apical slope. Scutellum roundly convex ; 

 sparsely punctured ; the basal depression large, smooth, 

 and bearing three longitudinal keels ; the post-scutellum 

 closely punctured. The base of the metanotum depressed ; 

 in the middle is a distinctly defined area, slightl)' wider 



