Manchester Memoirs, Vol. xliii. ( 1 899), No. 3. 31 



apice albis ; pedibus rufis, coxis, trochanteribus tarsisque 

 albis ; bast tarsorum posticoruni nigro ; alls hyalinis, 

 stigmate fusco, basi pallido. ? . 



Long. 8 mm. 



Antennae as long as the thorax and abdomen, not 

 tapering towards the apex ; the basal two and the base 

 of the third joint testaceous ; the apex of the sixth and 

 the following joints clear white ; the rest black ; the second, 

 third, and fourth joints equal in length and distinctly longer 

 than the apical. Head black, shining, impunctate ; the 

 labrum, clypeus, mandibles, and palpi clear white ; the 

 mandibular teeth black. The front raised ; shallowly 

 depressed in the middle at the top ; the lower part deeply, 

 the apex of the clypeus widely, depressed. Thorax 

 shining, impunctate, a line on the pronotum, the apex of 

 the middle lobe of the mesonotum, the scutellum, the 

 upper part of the mesopleurse at the base, its apex 

 narrowly and a large oblique mark in the middle towards 

 the apex, white. Mesonotum impunctate, closely covered 

 with short, black hair ; the furrow on the middle lobe is 

 narrow, complete ; the scutellum rather flat ; the de- 

 pression at its base large. Wings clear hyaline, the 

 stigma pale at the base ; the recurrent nervures are 

 received in the same distance from the base of the 

 cellules within their basal third ; the median nervure is 

 received in the middle of the cellule ; the accessory 

 nervure in the hind wings interstitial. Legs rufo-fulvous, 

 the hinder darker in tint ; the coxae and trochanters 

 white ; the base of the hind tarsi broadly black ; the apex 

 of the fourth and the other joints white ; the claws 

 ferruginous, bifid ; the calcaria rufous. Abdomen black, 

 shining ; the apices of the segments, narrowly, the apical 

 two entirely, white ; the ventral surface whitish, except 

 on the apical two segments. 



