124 HYMENOPTERA FROM SARAWAK, 
testaceous ; the palpi white ; the wings hyaline ; the lower part of 
the clypeus and the nervures testaceous; the back of the five 
basal segments of the abdomen, SEEN longitudinally and 
closely. 
Length 5-6; terebra 7 mm. 
Hab. Kuching. 
Antenne longer than the body; the scape and basal joint 
of the flagellum black, bare and shining ; the other joints brown- 
ish black. Face aciculated, almost shining; the clypeus im- 
punctate, shining. Apex of mandibles black. Thorax covered 
with longish white pubescence. Legs covered with white pubes- 
cence, the front pair testaceous, the middle tarsi dark testaceous. 
The 1st and 2nd abscisse of the radius are together shorter than 
the 3rd. Post-petiole rugosely punctured; the base smooth, 
its sides striated ; its middle with a smooth furrow which projects 
into the punctured apical part. The basal plate on the base of 
the second segment is longer than broad, narrowed towards and 
longitudinally striated ; the keel is narrow; the suturiform arti- 
culation and the furrow on the 3rd and 4th segments are striated 
closely ; the 4th dorsal segment projects bluntly in the centre; 
the 3rd and following segments are narrowly edged with whitish- 
yellow on the apex. | 
Sigalphogastra, gen. nov. 
Abdomen with 5 segments, the 3 middle ones broader than 
long, the basal and apical longer in proportion to the breadth ; 
all the segments longitudinally striated; the last broadly round- 
ed at the apex ; the apical 3 with transverse crenulated ‘furrows 
on the base. Median segment with a stout keel in the centre at 
the base and two curved narrower, sharper keels on the apical 
half. ‘Temples broad, slightly roundly narrowed. Malar space 
large. Wings as in Bracon. Legs rather slender, the tibiee 
and tarsi densely pilose. 
This genus possesses all the characteristics of the Braconini 
except as regards the marked difference in the form of the abdo- 
men. In the Braconini there are 7 segments which become 
gradually smaller; in the present genus there are only 9 large 
segments of almost equal size. ‘The form of the abdomen re- 
minds one of the Chelonine, but that group does not belong to 
Jour. Straits Branch 
