Manchester Memoirs, Vol. xli. (1897), No. 4. 33 



Bracon tricarinatus, sp. nov. 



Niger, capite, prothorace, scutello, abdominis basi et apice 

 pallide luteis ; alls fere hyalinis. 2. Long. 7 mm.; terebra 

 3 mm. 



Hub. Ceylon {Yerbnry). 



Head testaceous-yellow, except at the orbits; shining, 

 impunctate ; the tips of the mandibles black and piceous ; 

 a deep, wide furrow leads down from the ocelli. The 

 scape of the antennae black ; the flagellum broken off. 

 Pro- and meso-notum smooth, shining, impunctate; in the 

 centre of the latter is a large black mark reaching from 

 the extreme base to near the middle, and two equally 

 large lateral ones reaching from near the base to the 

 apex; the scutellum luteous; the mesonotum at its sides 

 and apex, black. Median segment entirely black ; at the 

 base in the centre is a depression which is finely longi- 

 tudinally striated. Meso- and meta-sternum black ; the 

 metapleurse and the mesopleurse from the end of the 

 oblique furrow, black. The front legs are entirely testa- 

 ceous ; the middle pair testaceous except the coxae and 

 trochanters; the posterior pair entirely black. The petiole 

 testaceous ; its raised centre black ; the raised central part 

 is narrowed gradually towards the apex, where it is a little 

 less than the width of the lateral parts ; at the apex it is 

 stoutly keeled in the centre with the sides depressed; the 

 base of the depression sharply keeled ; the lateral depres- 

 sion on the inner side obliquely striated ; its sides keeled 

 down the centre. The second segment in the centre 

 irregularly reticulated ; the sides rugosely punctured ; in 

 the centre is a straight, stout keel, triangularly dilated at 

 the base, this part being aciculated; the latter keels are 

 equally stout, not dilated at the base and oblique ; the 

 third segment is longitudinally rugose, except at its sides 

 at the apex, where it is smooth and shining ; in the centre 



c 



