Genera ani Species of Hjinenoptera. 149 



i.s finely and closely striated down the middle, the fourth still 

 more finely and less distinctly. 



Bystra, gen. nov. 



Scutellum flat, its sides, and apex to a less extent, stoutly 

 keeled. Abdomen with eight segments, its ovipositor pro- 

 jectinf?. Tibiiii and tarsi spinose. Labrum projecting. 

 JMandibles with a large upper and a shorter lower tooth. 

 Median segment completely areolated, its spiracles linear. 

 Antennai stout, dilated, and compressed before the apex. 

 Occiput margined, but not sharply. Apex of median seg- 

 ment with a straight somewhat abrupt slope. The ventral 

 keel is on segments 2, 3, 4, and on the base of the fifth, 

 reaching to the base of the ovipositor. Areolet 5-angled, 



Belongs to the Oxypygi. From Ichneumon it may be 

 known by the abdomen having eight instead of seven 

 segments. In having eight dorsal segments it agrees with 

 Exephanes, from which it may be known by the flatter 

 sharply keeled scutellum, by the tibije and tarsi bearing stiff 

 spines, and by the dilated antennai. The transverse basal 

 nervure is interstitial ; the stump of a nervure on the disco- 

 cubital is large; the areola of metanotura is not quite horse- 

 shoe-shaped, its sides at the base being stronger, not curved ; 

 the basal joints of the flagellum are not elongate, but still 

 lunger than broad ; the ovipositor extends to the apex of the 

 filth ventral segment and largely projects. 



Bystra testacea, sp. n. 



Testacea, nigro-maculata, facie, orbitis oculorum, coxis trochanteri- 

 busque pallida flavis ; alls fere fusco-hyaUnis, stigmate uervisque 

 testaceis. $ . 



Long, 15 mm. 



Hab. Khasia Hills. 



Scape of antennje pale yellow ; the basal sixteen joints of 

 the antennse testaceous, the apical black, compressed and 

 dilated before the apex, which is narrowed. Head pallid 

 yellow ; the middle of the front, vertex, and occiput broadly 

 testaceous. Face and clypeus sparsely punctured, almost 

 bare, shining : the front and vertex shagreened, almost punc- 

 tured ; labrum smooth, fringed with pale hair. Mandibles 

 smooth, the teeth black. Thoiax rufo-testaceous j the pleurai 

 paler, yellowish; the apex of the pronotum, a small mark on 

 the base of the propleurse above the middle, the part below 

 the tubercles, an oblique mark above the centre of the meso- 

 pleuia", a maik above the middle coxa?, a line along the base 

 of the mesonotum, a mark in its centre, one on its apex before 



