HYMENOPTRRA FROM SARAWAK. 39 



paler, more yellowish in tint, rugosely punctured and covered 

 with pale hair ; the front and vertex are more sparsely covered 

 with longer darker hair. Mandibles black, broadly rufous at the 

 base. Thorax smooth and shining ; the middle of the mesonotum 

 behind is broadly expressed ; the central lobe is clearly defined ; 

 the median segment is thickly covered with longish fuscous hair. 

 Wings dark fuscous, with a violaceous tinge at the base ; the 

 nervures and stigma are black. Metapleurce widely and deeply 

 furrowed down the middle. The front legs are rufous with a 

 yellowish tinge ; the middle pair are brownish ; the femora paler ; 

 the tarsal spines are black. The petiole is broadly keeled down 

 ths centre ; the sides on the apical half are stoutly irregularly 

 striated; the keel on the second segment extends to the 

 transverse furrow ; its dilated base is finely striated ; the sides 

 and centre are irregularly, longitudinally striated to near the 

 apex which is smooth and laterally expressed ; the third segment 

 at the base is longitudinally striated ; the stri'ce in the middle 

 reaches to the apex ; the apical segments are brownish. 



Myosoma trichiura, sp. nov. 



Long : 14 ; terebra 14-15 mm. 



Hab. Sarawak (Shelford). 



Antennas black, the base and apex of the scape rufous. The 

 sides of the head are punctured ; in the centre of the face are 

 three stout, transverse keels. Mandibles rufous, their apex 

 broadly black. The face is rather thickly covered with long 

 black hair ; the frons and vertex sparsely so. Pro- and 

 mesothorax rufous, smooth and shining ; the median segment 

 black. Legs black ; the anterior pair rufous ; the apex of the 

 median segment is sparsely, longitudinally striated. The apex 

 of the petiole is coarsely irregularly reticulated the lateral 

 furrows are depressed and transversely striated. The second 

 segment is irregularly longitudinally striated ; its basal area is 

 broad at the base, becomes gradually and sharply narrowed 

 towards the apex, is longitudinally striated and extends beyond 

 the middle ; on either side is an oblique, closely striated furrow. 

 The third and fourth segments are closely striated ; the basal 

 furrow on the third extends to the sides ; from it issues a 

 curved furrow ; the furrow on the fourth does not extend to the 



