HYMENOPTERA FROM BORNEO. 9 



the middle, below closely, uniformly finely punctured. Face 

 strongly, but not closely punctured, the middle below impunc- 

 tate, finely, closely longitudinally striated. Middle of front 

 distinctly depressed, the sides of the depression irregularly 

 raised ; in the middle is a keel which is wide above, gradually 

 narrowed below. Temples two-thirds of the length of the 

 eyes, rounded behind. The part bordering the keel on the 2nd 

 abdominal segment at the base is stoutly transversely striated, 

 followed by a smooth space; beyond is a long and a short 

 curved longitudinal keel, the outer more curved than the 

 inner ; inside are 4 stout, curved oblique keels, the keel be- 

 tween the 2 portions is flat and becomes gradually widened ; the 

 apex on the outerside is wide, depressed ; the strias on the 

 outerside of the 3rd segment are more curved and irregular 

 than are those down the middle. The apex is smooth and 

 shining ; the apex of the striated lateral parts depressed ; 

 there is a curved depression on the sides of the striated part of 

 the 4th segment near the apex. Centre of mesonotum depress- 

 ed at the apex. 



This species should be known by the long malar space and 

 by the strongly striated metanotum. 



v Iphiaidax lineativentris, sp. nov. 



Black, the antennal scape, head, pro- and mesothorax, the 

 anterior legs and the middle femora, red ; wings fuscous, the 

 nervures and stigma black ; the 1st and 2nd abdonimal segments 

 strongly, the 3rd more finely, except at the apex, and the basal 

 half of the 4th still more finely striated; the 2nd segment as 

 long as the 1st, fully one fourth longer than wide, the 3rd 

 slightly longer than wide ; the raised central part of the 1st 

 segment deeply furrowed in the middle, the apex of the furrow 

 narrowed to a point, the basal half of the sides raised, flat, 

 with a fovea at the base and apex, both obliquely narrowed at 

 the apex, almost the apical half of the sides depressed, the 

 depression divided by an oblique keel : the keel on the 2nd seg- 

 ment extends from the base to the apex, is not very broad 

 at the base and becomes, gradually narrowed to a point, 

 and is closely, somewhat strongly striated ; the raised 



B.A.Soc, No. 48, 1907. 



