538 Mr. P. Cameron on new 



the alar nervures ; but it may be easily known from it and 

 from all the other genera in having the radial cellule com- 

 pletely open at the apex, the radius being very short. 



Harkeria ru/a, sp. n. 



Rufa ; vertice mesonotoque nigris ; antennis longiore quam corpore, 

 flagello nigro ; alis hyalinis, stigmate pallido, nervia pallide 

 fuscis. 2 ' 



Long, fere 4 mm. 



Anlennee blackish, the scape and the base of the third joint 

 rufo-testaceous. Head, pro- and mesothorax smooth and 

 shining ; the face and clypeus of a much paler colour than 

 the vertex ; the ocellar region deep black ; on either side of 

 the front ocellus is a fuscous splash which extends to and 

 behind the eyes. The mesonotum, except in front at the 

 sides, black ; the scutellum and postscutellum are of a darker 

 rufous colour ; the median segment is obscurely shagreened 

 at the base. The petiole closely shagreened ; the rest of the 

 abdomen is smooth and shining. 



Taken near Gloucester in June many years ago, probably 

 on the banks of the Severn, when in the company of the late 

 Prof. Allen Harker. 



Lamadatha, gen. nov. 



Wings abbreviated and narrowed ; the stigma and meta- 

 carpus greatly thickened, broad, projecting beyond the costa ; 

 the stigma not separated from the metacarpus ; the radius 

 irregular, thickened, about half the thickness of the stigma ; 

 it is united to the stigma shortly behind the middle by a short 

 branch, near which there is on it a small cellule, which is 

 longer than broad ; the transverse preebrachial and the prse- 

 brachial nervures are normal ; in the hind wings the costa is 

 thick ; the subcostal area is distinctly defined ; both wings 

 are ciliated with long hairs. Antennae filiform, longer than 

 the body, 24-jointed. Head large, broader than long, broadly 

 projecting behind the eyes ; the occiput not margined, rounded 

 inwardly. Middle lobe of the mesonotum distinctly separated ; 

 the scutellum roundly raised ; the postscutellum convex, 

 distinctly separated from it. Metathorax rugosely punctured, 

 it has a rounded slope from the base to the apex. Petiole 

 distinct, thick, longer than broad, rugose, the other segments 

 flat, smooth, and shining, its apex blunlly rounded. Eyes 

 bare, distant from the mandibles. 



The face is rugose, the clypeus roundly convex, smooth, 



