MAI-AY PAkASÎTKt HVMKNOPTKRA. 41 



Chaolta crassicauda sp. nov. 



Black, the head, anten nal slope above, thorax, except the 

 centre of metanotum and the 4 front legs, red, the middle 

 coxse above and their trochanters, black ; the wino-s dark 

 fuscous, tinged with violaceous, the stigma and nervures black, o. 



Length, body and ovipositor, 20 mm. 



Barabei, Z. 0. afd. Borneo. (Pool leg.). 



Pace sparsely haired, laterally obscurely, finely striated ; 

 the plate slightly shorter than its width at the base, the apex 

 broadly rounded, slightly raised, the keel is obliquely narrowed 

 on the basal half, the apical larger, more rounded and does 

 not, below, reach to the middle of the plate, which has the 

 upper half irregularly rugose, the lower smooth and shining. 

 Mandibles rufous, black at the apex. Palpi dark rufous. First 

 abdominal segment closely, longitudinally striated, the raised 

 central part is of equal width and wider than the lateral ; 

 the following 3 segments are closely longitudinally striated, 

 the 4^'! more finely than the others. The area on the base of 

 the 2"'^ segment is closely longitudinally striated, extends to 

 the middle of the segment and becomes gradually narrowed ; 

 there is a smooth shining space on either side of the middle; 

 the lateral furrows are narrow and slightly curved. The tem- 

 ples are slightly longer than the eyes, their basal half straight, 

 the apical roundly narrowed. The 2"'^ abscissa of the radius is 

 only slightly longer than the S""'^. The sheaths of the ovipositor 

 broad, densely covered with stiff black hair. 



The outer edges of the 1^' abdominal segment are pale yellow. 

 The furrows on the 3"^ and 4"' segments are roundly curved, 

 narrow and striated ; and as are also the ajiical transverse 

 furrows. Clypeal foveœ large, deep ; the outer edges of the 

 dypeus black, projecting. Occiput transverse. 



C. rußceps is closely related to this species ; it may Ije known 

 bv the temples being more oblique ; the keel on facial plate 



