50 IPMAULAXAND CHAOLTA. 



black mark on the vertex extends laterally to the eyes and 

 becomes gradually narrowed to the middle behind. 



Comes close to C. lutea ; that species may be known by the 

 immaculate front, longer ovipositor and yellow scape of antennas 



Chaolta sulcata, sp. nov. 



Length 9 ; terebra 5-6 mm. 



Hab. Kuching. July. 



This species is very similar to C. 3-iuberculata and has, 

 like it, the base of 2nd abdominal segment trituberculated ; it 

 is smaller and more slenderly built; has the facial plate smaller, 

 and not raised along the apex ; the scutellum is not flat and 

 hollowed and on a level with the mesonotum, but is raised 

 above it and the metanotum, it being slightly, but distinctly, 

 convex ; and the mesopleurae have a distinct longitudinal 

 furrow below ; it being wider, deeper at the base, where it 

 borders the mesosternum ; the 2nd abdominal segment is 

 smaller compared with the 3rd and the ovipositor is shorter. 

 The furrow running from the metarhoracic furrows is wide 

 and deep ; the centre of the metanotum is finely closely 

 longitudinally striated ; the top and inner side of the 1st 

 cubital cellule are broadly hyaline and there is a small hyaline 

 spot, longer than broad, in front of the upper side of the re- 

 current nervure; the lateral furrows on the sides of the 2nd, 

 3rd and 4th segments are distinct ; the suturifortn articulation 

 is narrower than it is in S-tuberculata. The pleurre, sternum 

 and legs are covered with long white pubescence. 



Chaolta maculifrons, sp. nov. 



Length 9 ; terebra 8 mm. 9 . 



Hab. Kuching. April. 



Agrees closely with C. trituberculata, having, like it, the 

 base of the 2nd abdominal segment trituberculate, but not so 

 strongly ; the front is black except in the centre ; the black 

 mark extends to the eyes, is continued behind them all over 

 and, in the middle, is triangularly produced half-way on to the 

 vertex ; and the metanotum and back of abdomen are marked 

 with black. 



Jour. Straits Branch 



