178 HYMENOPTERA FROM SARAWAK, 
Length 7 to 8 mm. 
Hab. Kuching. 
The scape of the antenne appears thinner and longer than 
usual; the flagellum is brownish beneath. Head closely and dis- 
tinctly punctured, the front more strongly than therest; the 
clypeus is broadly, roundly raised in the centre, where it is 
bare. smooth and shining; its top and the face above it are 
bordered by smooth lines, mandibles rufous, black at the base; 
the hair is long and pale; the occiput is sharply margined. 
Mesonotum closely and strongly punctured, the hair on it is 
thicker and whiter round the edges; the scutellum has the hair 
longer and thicker; the post-scutellum is thickly covered with 
white pubescence, the furrow at the base of the scutellum is 
longitudinally striated. Median segment with an oblique slope ; 
the centre on the apical half is furrowed ; the sides on the apical 
half are distinctly keeled. The flocus on the hinder tibiz is 
long and pale; on the tarsi it has a rufous tint. The basal 
four segments have a band of depressed white pubescence; the 
hair on the ventral surface is long and white. Characteristic of 
this species is the smooth, roundly convex, shining clypeus and 
the two keels on the sides of the median segment. 
Nomia iridescens, Sm. 
This species has been taken at Kuching. It has been re- 
corded from India and Sumatra. 
Ctenonomia, gen. nov. 
Fore wings with three cubital cellules, of nearly equal size. 
Head narrow, the temples short, ocelliin a curve. Abdomen 
short, ovate; the 2 with a dense ventral scopa; its apical seg- 
ment with a rima. Pronotum keeled; the keel widest on the 
sides. Metonotum large, transverse, flat, stoutly keeled on the 
sides and apex and longitudinally striated; its apex with a per- 
pendicular slope. Legs densely covered with long hair; the 
spurs toothed; the claws cleft unequally. The body is short 
and broad. The wings are large: their stigma thick ; the basal 
nervure is roundly curved; the transverse median nervure is 
received shortly behind it ; the 1st recurrent nervure is received 
Jour. Straits Branch 
