IPHIAULAX AND CHAOLTA. 45 



Iphiaulax abgarus, sp. nov. 



Black ; head, pro- mesothorax, the greater part of middle 

 femora and the front legs ; the metapleurae, and the scape of 

 antennae below, red; wings dark fuscous-violaceous, the nervures 

 and stigma black ; apical half of 1st. abdominal segment finely, 

 the 2nd. more strongly longitudinally striated ; the plate on the 

 base of latter does not reach to the middle ; it is longer than its 

 width at the base, becomes gradually narrowed to a point, the" 

 base smooth, the rest closely, finely striated. £ . 



Length 12 ; terebra 12-13 mm 

 Hob. Kuching. May. 



Scape of antennae and pedicle marked with red below ; the 

 scape about twice longer than wide. Face and clypeus smooth and 

 shining, sparsely haired, the clypeus not clearly separated from 

 the face. Temples longer than the antennal scape ; occiput 

 transverse. Parapsidal furrows deep, clearly defined ; the mid- 

 dle lobe of mesonotum not raised. Suturiform articulation wide, 

 strongly striated ; its posterior furrow is curved and striated ; 

 the sides of the 3rd. segment are coarsely aciculated ; there is a 

 narrow, almost smooth furrow, which curves roundly backwards 

 on the 4th. segments ; on the ventral surface are three pairs of 

 large black spots. Legs thickly covered with long hair. 



Comes close to /. syleus but that may be known from it by 

 the much longer antennal scape, it being three times longer than 

 wide. 



Iphiaulax tristator, sp. nov. 



Black ; the head and thorax red, the metanotum inf uscated ; 

 the fore legs red ; the apex of middle femora and base of tibiae 

 broadly of a darker red ; wings dark fuscous, the nervures and 

 stigma black, scape of antennae dark rufous below ; the basal 

 five abdominal segments striated. 9 . 



Length 12-13 mm. 

 Hah. Kuching. 



Scape of antennae short and thick, not much more than twice 

 longer than wide. Face smooth in the centre, an elongated 



R. A. Soc, No. 42,1904. 



