PHYTOPHAGOUS AND PARASITIC HYMENOPTERA. 131 



The apex of the propleurse from above the middle stoutly striated ; 

 the mesopleurse more finely, closely striated. Thorax except the 

 mesonotum thickly covered with silvery pubescence. 



Eyes large, pilose, converging below, incised on inner side, reaching 

 close to the base of the mandibles. Transverse median nervure in 

 hind wings unbroken. Second recurrent nervure received beyond 

 the transverse cubitus ; the transverse median about the same 

 distance beyond the transverse basal. Mesonotal furrows distinct. 

 Second discoidal cellule not much wider at apex than at base ; 

 the third liaK the width at the base it is at the apex. Scutellum 

 laterally keeled. Mesopleurse strongly, closely, longitudinally 

 striated. The second discoidal cellule not much wider at the base 

 than at the apex ; the third half the width at the base it is at the 

 apex. Ovipositor half the length of the abdomen. Occiput margin- 

 ed, not quite transverse. Temples not narrowed. Mandibular 

 teeth of equal length. Basal joint of hind trochanters more than 

 twice the length of the apical ; the hind femora narrowed at the 

 base. 



Tryphonin^. 



43. — Bassus orientalis, sp. nov. 



Black; the face, clypeus, mandibles, palpi, the eye orbits to near 

 the oceUi, a large mark on the sides of the mesonotum reaching to the 

 tegulse, broad in front, becoming gradually narrowed towards the 

 apex, the upper hinder edge of the propleurse touching the tegulse, 

 tubercles, tegulse, scutellum, post-scutellum, and a small triangular 

 mark below the hind wings, lemon-yellow. The apices of the basal 

 three segments of the abdomen narrowly lined with pale yellow ; 

 the apical two lines widely interrupted in the middle. Four front 

 legs yellow, their femora tinged with fulvous ; the hind coxse yellow, 

 tinged with fulvous ; the femora fulvous ; the hind tibiae yellow to 

 shortly beyond the middle, the rest of them and the tarsi black. 

 Scape of antemise yellow, the flagellum brownish beneath. Wings 

 hyaline, the stigma and nervures black, 6 



Length 6 mm. 



Peradeniya. — Bred from Syrphid larvae feeding on the tea aphis. 

 April. 



The lateral sutures bounding the clypeus straight, oblique, the top 

 rounded, the apical half narrowed, the sides roundly curved, the 

 apex slightly, but distinctly roundly incised ; the face and oral region 

 covered with short white pubescence. Vertex punctured but not 

 strongly or closely ; the front less strongly punctured and distinctly 

 furrowed down the centre. Thorax closely punctured ; the metano- 

 tum is more closely, more rugosely punctured ; the central apical 



T 8(17)05 



