HYMEN9PTERA FROM BORNEO. 11 



furrows wide, shallow, smooth. The area on the 2nd segment 

 becomes gradually narrowed to a fine point, longer than it is 

 wide at the base ; the part bordering it is irregularly, stoutly 

 reticulated ; the outer division is depressed in the middle and 

 obliquely striated, the stria?, more regular at the apex than at 

 the base ; the 1st transverse furrow is deep, stoutly, but not 

 closely crenulated ; at its sides near the outer edge is a large 

 irregular smooth space ; the 2nd furrow is narrower and more 

 closely crenulated ; there is a narrow, smooth furrow on the 

 base of the oth segment. Abdomen clearly longer than the 

 head and thorax united. There is a distinct furrow down the 

 centre of the front. 



Allied to I. trichiotiiecus, Cam.; it is a stouter species, with 

 the back of the abdomen not suffused with rufous, the central 

 part of the 1st abdominal segment is of equal width, not nar- 

 rowed towards the apex, the centra] keel is much shorter, net 

 half the length of the segment, this keelless basal part being 

 perfectly smooth ; in tn'chiotheciis the keel extends from the 

 apex to the base, the sides being more or less striated- 

 reticulated . 



Chaolta laticauda, sp. no v. 



Red, the flagellum of antenna? hind legs, except the base 

 of coxa?, the abdomen in the centre of the 1st segment, the 

 apical 3, and the sheaths of the ovipositor, black; the middle 

 abdominal segments largely suffused with rufous ; wings 

 fuscous, tinged with violaceous, the nervures black, the stigma 

 black, suffused with testaceous. 9 



Length 12 mm. ; terebra 13 mm. 



Kuching. December. 



The keel between the antenna? is stout ; the plate is not 

 very prominent, broader than long depressed, gradually widen- 

 ed towards the apex ; the keel only extends to its base. Centre 

 of face broadly depressed, finely rugose, the sides rounded, 

 smooth. Tips of mandibles black. Flagellum of antenna? 

 densely covered with short, stiff black pubescence. Thorax 

 long, narrow, flat above, without furrows ; the metapleuras 

 with a wide, shallow furrow in the middle. First abdominal 



R A- Soc . No. 48, 1907. 



