IPHIAULAX AND CHAOLTA. 49 



Chaolta trituberculata, sp. nov. 



Luteous, antennae and a curved mark across the ocelli, 

 black ; wing's fuscous, yellowish-hyaline to near the transverse 

 basal and to the transverse median nervures ; 2nd abdominal 

 segment at the base tuberculate in the middle and at the sides ; 

 its area reaching to the middle of the segment ; closely striated 

 and becoming- gradually narrowed to a sharp point. 9 



Length 11-12 mtn. ; terebra 9 mm. 



Hab. Kuching. April. 



Antennae shorter than the body ; its scape stout, about 3 

 times longer than broad, not hollowed below; its apex with a 

 hollow, broadly bordered, longer than broad and rounded at the 

 apex. Face irregularly punctured : below the antennae is a 

 plate, broader than long, with raised edges ; a stout keel runs 

 into it from between the antennae. Temples broad, rounded 

 behind ; occiput transverse. Mesonotum, scutellum and meta- 

 notum on one level, flat; the parapsidal furrows obsolete; 

 scutellum depressed, becoming roundly narrowed towards the 

 apex. Central area of 1st abdominal segment strongly, closely 

 longitudinally striated; of almost equal width throughout; the 

 lateral depressions finely striated on the inner side ; 2nd to 5th 

 segments closely longitudinally striated, the striae becoming 

 weaker gradually ; the 2nd, 3rd and 4th segments with strong 

 oblique depressions on the base at the sides ; the 2nd segment 

 outside the furrow is irregularly striated ; the striae more or 

 less curved. The abdomen is distinctly wider than the thorax 

 and is not much longer than it. The 3rd abscissa of the radius 

 is as long as the basal 2 united. The base of the stigma is 

 ochraceous ; there is a curved hyaline cloud, dilated above, on 

 the lower side of the 1st cubital cellule and one along the 

 outer side of the recurrent nervure. Legs short and stout ; 

 tarsal joints spinose at the apex ; calcaria minute. Hypopygium 

 largely projecting ; fore tibiae as long as the basal 2 joints of 

 the tarsi. 



The 1st abdominal segment rises sharply, obliquely from 

 the base to the apex, forming a distinct angle with the 2nd; the 



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



