Ilymenoptera from Northern India. 223 



broad, rounded at the base, gradually narrowed to the apex; 

 the rounded basal part has a stout central keel and a less 

 distinct one at the apex ; the lateral areai stoutly obliquely 

 striated; the posterior median strongly, closely, transversely 

 striated, the sides more sparsely and strongly. Base of 

 propleurse aciculated, the upper half strougly punctured, the 

 lower with some stout striations; meso- and metapleui'se 

 closely and strongly punctured, the latter more strongly and 

 rugosely above the keel. The postpetiole has a depression in 

 the middle, which is wide at the ape x, narrowed towards tbe 

 base ; the second and third segments closely punctured, the 

 base of the second closely and strongly longitudinally 

 striated, the strise going on to the gastrocceli, which are 

 shallow, brownish, and aciculated at the apex. 



Algathia tibialis, sp. n. 



Black; a mark in the middle of the face above and the 

 base of the mandibles rufous ; ])alpi lemon-yellow, the apical 

 lateral areae of the mesonotum except at the base yellow; 

 first abdominal segment blood-coloured, the sides in the 

 middle blackish, the apex yellow, the apex of the second, 

 the sides of the third broadly at the apex, and the sixth and 

 seventh entirely, pale yellow ; the basal three joints of the 

 antennae rufous beneath, the tenth to sixteenth white, 

 fuscous above; four front legs rufo-fulvous, the coxte and 

 trochanters yellow ; the middle tarsi fuscous ; the hind legs 

 rufous, the apex of the femora, tibiae (except at the base), 

 and the tarsi black. Wings hyaline, with a slight fulvous 

 tinge, the stigma fuscous. $ . 



Length 8-9 mm. 



Hab. Khasia Hills. Coll. Rothney. 



Face closely punctured, thickly covered with fuscous 

 hair, the clypeus more strongly and sparsely punctured, the 

 front and vertex shining, sparsely punctured, the former 

 indistinctly keeled. Mesonotum strongly punctured, longi- 

 tudinally striated in the middle tow ards the apex. Scutellum 

 shining, thickly covered with long fuscous hair. Areola 

 obliquely narrowed towards the base and to a less extent 

 towards the apex, which is transverse ; its base has a central 

 and a less distinct and more irregular longitudinal keel on 

 the sides, the middle irregularly transversely striated; the 

 posterior median area is (except at the base) transversely 

 striated ; the outer basal area coarsely punctured, smooth 

 at the base; the apical stoutly transversely striated, more 

 stoutly on the apical than on the basal half; spiracular 



