Lv HYMENOPTERA FROM SARAWAK. 
almost forming reticulations; the apex of the median segment 
slightly projects on the top; the sides havea straight, slightly 
oblique slope from the top to the bottom. The Ist and 2nd 
abdominal segments are closely and strongly punctured; the 
1st is cup-shaped, broader than long ; its base is stoutly, irregularly 
keeled; the 2nd is longer than its width in the middle and is 
narrowed at the apex. 
The clypeus is not bordered laterally by a keel as in O. 
Sicheli; the antennal keel is not so stout nor so well defined 
as it is in that species, which has not the apex of the fore wings 
clouded. 
Rhynchium Matangense, sp. nov. 
Black; the apex of the thorax and the basal segment of the 
abdomen dark rufous; the under side of the scape and a large 
mark, roundly narrowed above, on the clypeus, yellow; the 
ventral surface and the apex of the abdomen densely covered 
with silvery pubescence ; the wings hyaline, radial and the apical 
cubital cellules fuscous with a distinct violaceous tinge; the: 
greater part of the hinder femora and a line on the middle,. 
rufous. 6. 
Length 13 mm. 
Hab. Matang. 
Flagellum of the antennee brownish beneath; the apical 
spine stout, slightly roundly curved. Front and vertex closely 
rugosely punctured ; the eye incision more widely and strongly. 
punctured than the rest ; the clypeus is less strongly and closely 
punctured ; its apex is slightly roundly incised, broad. There isa 
white mark on the base of the mandibles. Thorax coarsely 
rugosely punctured; the scutellums more coarsely than the 
mesonotum, and the median segment more coarsely—running into 
reticulations--than the mesonotum. The apex of the median 
segment has an almost vertical slope; its centre furrowed ; 
the sides broadly rounded and without spines forming two broad 
lobes. Mesonotum covered with short fuscous pubescence. First 
segment of abdomen cup-shaped, with a short, but distinct, 
neck ; the 2nd segment is barrel-shaped ; obscurely rugose; the 
3rd and 4th segments are more strongly and distinctly punc- 
tured. 
Jour, Straits Branch 
