HYMENOPTERA FROM SARAWAK. 35 



dorso pedibusque posticis nigris ; abdominis apice pallide flava ; 

 alis fuseis, 9 • 



Long 12-13 mm. 



Hab. Borneo ( Shelf ord). 



Antennae longer than the body, black, tapering towards the 

 apex. Head and antenna) rufous, smooth and shining ; the 

 median segment irregularly reticulated; more strongly and 

 regularly at the middle than at the base. On the back of the 

 pronotum, at the apex, is a long curved spine, which tapers 

 towards the apex and is directed towards the head ; between 

 this and the middle is a large leaf-like plate, hollowed above, 

 its sides curved and expanded outwardly; the lateral wings are 

 narrowed towards the apex ; at the base, running up the spine, 

 is a stout keel. At the apex of the middle lobe of the mesono- 

 tum is a stout keel ; the part on either side of it is striated. On 

 the depression behind the scutellum are six stout longitudinal 

 keels; from the middle of the sixth runs a stout, transverse 

 keel ; behind this are three short keels. The sides of the medi- 

 an segment at the apex project into stout teeth. The four 

 front legs are paler in tint than the thorax ; the apical joint of 

 the tarsi is black ; the hind legs are entirely black. Wings uni- 

 formly dark fuscous; the stigma and nervures are deep black; 

 abdomen deep black ; the sides of the first and second segments 

 and the base of the first and the apical segment are pale yellow; 

 the dorsum is closely and strongly longitudinally striated; the 

 first two transverse furrows are strongly striated ; the sides of 

 the third and fourth segments project into sharp, stout spines; 

 the spine on the fourth is the larger ; on the centre of the third 

 at the apex, is a stout triangular tooth, on the middle of the 

 fourth is a larger, sharper one; the apical segment ends in a 

 longish, sharp tooth. 



Comes nearest apparently to S. spvmtor, Guer, from Bengal, 

 but differs in the colouration of the wings and legs. 



Shelfordia, gen. nov. 



Median segment with a narrow area in the centre, extend- 

 ing from the base to the apex; second, third and fourth segments 

 of the abdomen closely longitudinally striated; the second with 

 four converging keels; there is a transverse crenulated furrow 



