HYxMENOPTERA FROM BORNEO. 5 



*/ Iphiaulax alienatus, sp. nov. 



Black, the head, thorax and anterior leg's red, the middle 

 legs red, suffused with black, the 1st abdominal segment smooth, 

 the middle with a stout keel, the sides with a weaker, more 

 irregular keel, the 2nd segment and the basal two-thirds of the 

 3rd strongly irregularly striated, the 2nd with a central keel 

 slightly, triangularly dilated at the base, extending to the apex 

 of the segment, the central part bordered by keels which slightly 

 converge towards the apex ; the suturiform articulation wide, 

 deep, crenulated ; there is a wide, transverse depression shortly 

 beyond the middle of the 3rd, where the striae end ; there are 3 

 stouter keels down the centre almost dividing the depression 

 into 2 parts. Legs densely covered with long black pubes- 

 cence. 9 • 



Length 15 mm. ; terebra 32 mm. 



Kuching. August. 



Face coarsely punctured-reticulated ; the clypeus more 

 finely reticulated, bordered all round by a keel. The 2nd 

 abdominal segment is as long as the 1st, longer than the 3rd ; 

 on the outer, apical half of the central division is a longish 

 curved depression ; the striae are stout, few in number and more 

 oblique on the outer than on the inner parts ; the central part 

 of the 3rd, on either side of the central keels, is raised, smooth. 

 Malar space not much more than half the length of the eyes. 

 The basal two abscissae of the radius together shorter than the 

 apical. 



. Iphiaulax cxtrancus, sp. nov. 



Black, the antennal scape, head, thorax and front legs red, 

 the middle femora tinged with red ; wings fuscous, the nervures 

 and stigma black. First abdominal segment smooth, keeled down 

 the middle, the sides depressed ; the central part is clearly 

 raised and has perpendicular sides ; the part bordering it below 

 narrow, stoutly crenulated; the segment is slightly longer than 

 the 2nd, which is stoutly striated to near the apex ; its central 

 area is smooth, narrow, bordered by raised keels ; it becomes 

 gradually narrowed to a fine point near the middle and is 

 continued as a fine keel to the apex ; the segment is smooth at 



R. A. Soc, >'o. 48, 1907. 



