108 HYMENOPTERA OF SARAWAK. 



the metapleurae and the metanotum in the centre at the base 

 are red ; the metanotum covered sparsely with long white hair ; 

 the metapleural furrow is wide and deep. The basal half of 

 the central part of the 1st abdominal segment is smooth and 

 shining, and there is a smooth line down the centre of the 

 apical part, this line being aciculated towards the apex. 

 Suturiform articulation deep, closely crenulated ; there is no 

 furrow on the apex of the 2nd segment, or on the 3rd ; there 

 is a narrow, distinct, crenulated furrow on the base of the 4th. 

 Ventral segments white, with large black marks on the sides. 

 The abdomen is as long as the head and thorax united and is 

 wider than the latter. Palpi black, covered with white hair. 

 Legs thickly covered with short, white pubescence ; the middle 

 coxae are infuscated before and behind. 



Iphiauhx triornatus, sp. nov. 



Eufo-testaceous, the antennae, 3 large marks on the 

 mesonotum, the apical 2 segments of the abdomen, and the 

 hind legs, black ; wings hyaline, the costa and stigma black, 

 the nervures paler, the base of the stigma whitish testaceous. 9 . 



Length 7 mm. ; terebra 3 mm, 



Kuching. 



Abdomen broad, ovate, as long as the thorax ; the area 

 on 2nd segment small, triangular and with a smooth keel twice 

 its length. The central area of the 1st segment is smooth in 

 the middle, the sides reticulated ; the lateral furrows wide, 

 irregularly transversely striated in the middle. The 2nd to 

 4th segments are longitudinally, closely rugose ; the suturi- 

 form articulation crenulated ; there is a similar furrow on the 

 base of the 4th and a narrower one on the 5th ; there are 

 narrower crenulated furrows on the apices of the 4th and 5th. 

 Temples long, not narrowed behind, the hinder edges rounded. 

 Face somewhat strongly but not closely punctured ; there is a 

 triangular depression over the clypeus. Malar furrow distinct, 

 deep. Hind legs stouter than usual ; the femora on the basal 

 half above and a ring on the base of the tibiae testaceous ; 

 the tarsi are shorter than the tibiae ; thick, the metatarsus as 

 long as the following two joints united. The black apical 



Jour. Straits Branch 



