44 HYMENOPTERA FROM SARAWAK. 



is not distinctly separated from the face. The head is wider 

 than long, is not much developed behind the eyes, and is obli- 

 quely narrowed there; the labrum does not project. The trans- 

 verse cubital nervure has the stump of a nervure in the middle. 

 This genus is founded on the species which I doubtfully referred 

 to Macrogaster {Manchester Memoirs, XLIII, 193). Its real 

 position is with the Acvenitini, and comes, in Ashmead's arrange- 

 ment, nearest to Arotes, which may be known from it by the 

 long and slender hinder tibiae and tarsi, the tibiae being almost twice 

 the length of the femora. From Acvenites it may be separated 

 by the deep parapsidal furrows, and by the areolated median 

 segment. To this genus may be referred the following species. 



Siphimedia bifasciata r sp. nov. 



Nigra, facie clypeoque flavis; alis hyalinis, fusco-bifasciatis. 



Long: 10 mm. 



Hab. Sarawak (R. Shelf ord). 



Head black, the face, except for a triangular black mark in 

 the middle above, and the greater part of the clypeus, pale 

 yellow. The face is strongly, transversely punctured; the apex 

 smooth and depressed; the upper part of the head smooth and 

 shining, and has a distinct plumbeous hue, as have also the pro- 

 and meso-thorax which are smooth and shining; the apex of the 

 middle lobe is stoutly transversely striated. There are three 

 stout longitudinal keels on the scutellar depression. The areola 

 is longer than wide, becomes slightly narrowed towards the 

 apex, which is rounded; the apical central area is long and 

 extends to the apex, its apical half is widely dilated and has the 

 sides stoutly striated; on the top is a stout, curved transverse 

 keel ; the outer central area has two stout longitudinal keels in 

 the middle. The median segment is irregularly punctured and 

 coarsely irregularly longitudinally striated in the middle, 

 especially at the base. The mesosternal furrow is wide and is 

 coarsely transversely striated, and is thickly covered with white 

 pubescence. Wings hyaline; there is a fuscous cloud, extend- 

 ing from the stigma to the cubitals and there is a similar cloud 

 at the apex. Legs black; the anterior tibia? and femora testace- 

 ous in front, and fuscous behind. The apical dorsal segments of 

 the al.'domen are lined with white. 



