102 HYMENOPTERA OF SARAWAK. 



Chaolta lutea, sp. nov. 



Luteous, the fla vellum of antennaa black ; the wings fus- 

 cous, behind the transverse median nervure, yellowish hyaline ; 

 the stigma black. ? . 



Length 10 ; terebra 8-9 mm. 



Hab. Kuching. April. 



Head smooth, shining ; in the centre of the face is a de- 

 pression about twice wider than long and with the sides 

 rounded ; oral depression small ; temples wide, longer than 

 the eyes. Apex of mandibles black. Apex of scape of an- 

 tennae below excavated slightly, the depression stoutly keeled, 

 the keel produced at the apex into a broad tooth ; the antennal 

 tubercles stout. Facial plate wider than long, becoming 

 gradually narrowed towards the apex and without a plate at 

 the base. Thorax smooth and shining ; flat above ; the meta- 

 notum with a thin keel down the centre. The depressed sides 

 of the petiole are distinctly longitudinally striated, the raised 

 central part rugosely punctured and striated; the 2nd and 3rd 

 segments are closely, longitudinally striated ; the area on the 

 2nd segment is about twice longer than broad, its sides margin- 

 ed, its apex rounded and half the width of the base ; it is more 

 finely longitudinally striated ; the 2nd to 4th segments are 

 closely rugose ; and have distinct oblique lateral depressions ; 

 the suturiform articulation crenulated. 



Front depressed, deeply furrowed in the centre ; the 3rd 

 joint of the antenna?, is slightly, but distinctly longer than the 

 4th abdomen oval, broader than the thorax and shorter than 

 the head and thorax united. Legs stout, densley covered with 

 pale hair ; stigma large, broad ; the recurrent nervure is re- 

 ceived shortly before the 1st transverse cubital ; 2nd abscissa 

 of radius as long as the 3rd of the cubitus and about one-fourth 

 shorter than the 3rd. 



This species differs from Chaolta proper in the facial plate 

 not having a keel in its centre, in the abdomen being 

 shorter and broader and in the 2nd abscissa of the radius being 

 shorter than the 3rd. In both species the mesonotum is quite 

 flat; in C. lutea the scutellum is not raised above the level of 



Jour. Straits Branch 



