22 HYMENOPTERA FROM BORNEO. 



smooth, the apical closely punctured ; the space between the 

 2 keels reticulated, finely at the base, which, at the sides, is 

 longitudinally striated ; the apical slope is strongly, irregularly 

 transversely striated. Propleurae smooth, the middle depres- 

 sion striated, the striae becoming longer towards the apex. 

 Mesopleurae, except at the apex, closely punctured, behind 

 the dilated smooth apex is a band of clearly separated 

 punctures ; the lower part is more or less striated. Meta- 

 pleuras smooth, sparsely, but distinctly punctured at the base, 

 the rest closely, stoutly obliquely striated. The dilated half 

 of the petiole is sparsely distinctly punctured ; on its apical 

 half (of the apex) is an oval, longish, depression ; at the base 

 of this is a longish, more clearly defined longitudinal furrow, 

 with obliquely sloped sides ; the petiole is narrowed at the 

 extreme base ; from there it becomes gradually widened to- 

 wards the apex ; it is finely punctured ; the 2nd, 3rd and 4th 

 segments are closely, distinctly punctured, the puncturation 

 becoming gradually weaker. Areolet large, longer along the 

 radius than on the transverse cubital nervures, 5-angled ; the 

 recurrent nervure is received shortly beyond the middle. 



Under the middle of the petiole, on the sides, are 4 short, 

 distinct teeth ; the basal 2 are more widely separated than are 

 the apical, which are separated from each other by a slightly 

 less distance than they are from the basal pair. The trans- 

 verse median nervure in the hind wings is broken shortly, but 

 distinctly below the middle. 



This species may be known from H. nasutus, Cam., and 

 H. tuberculatus, Cam., from the Eastern Himalaya by the teeth 

 on the lowerside of the abdominal petiole, and by there being 

 a small mark on the apex of the mesopleurae instead of a large 

 long mark, narrowed at the base along the lowerside, extend- 

 ing from near the base to the apex. 



C„— On two new species of Mellinus- 



\J Mellimts nigrolineatus, sp. nov. 



Thorax pale testaceous, the metanotum pale yellow, the 

 abdomen rufo-testaceous ; the head, a broad line in the middle 



Jour. Straits Branch, 



