314 HYMENOPTEEA. 



thorax together, if anything, narrower than the mesothorax, and of nearly equal width 

 throughout. The recurrent nervure is interstitial ; the second cubital cellule is shorter 

 than the third ; the cubitus is almost straight at the first cubital cellule. 



The group of B. fkustkattjs. 



Eyes large, oval, reaching nearly to the apex of the clypeus, converging a little near the 

 top. Bead broadly developed behind the eyes; front broadly, but not deeply, 

 depressed. Antennae stout, microscopically pilose, not longer than the body, origi- 

 nating from stout tubercles, so that there is a deep depression between them, the 

 depression extending nearly to the middle of the face. Mesosternal furrow obsolete. 

 Petiole semiperpendicular, deeply furrowed along the sides. A wide furrow down 

 either side of the second segment. Suturiform articulation deeply sinuated. 



A. Thorax black. 



* Central portion of the petiole of nearly equal breadth throughout, or at least not 



narrowed towards the apex. 



>~L 2. Bracon frustrate. (Tab. XIII. fig. 8.) 



Niger, nitidus ; abdominis segmentis l°-4 m runs ; alis fuliginosis. 

 Long. 11-12 millim. ; terebra 16-17 millim. 



Bab. Panama, Bugaba 800 to 1500 feet (Champion). 



Antennae scarcely so long as the body, tapering towards the apex, the scape curved 

 beneath, produced into a club at the apex. Face shining in the middle below the 

 antennae, the sides and mouth-region rugose, but not strongly so ; vertex and occiput 

 shining, impunctate ; an oval depression above each antenna, separated by a ridge, which 

 is not so high as the outer side of the depression and has a fine keel down its centre. 

 Palpi inclining to fuscous, especially at the apex ; pilose. Clypeus projecting at the 

 apex, and having a semicircular ridge near the base. The centre of the petiole is raised 

 considerably above the sides, especially at the apex, but excavated in the centre at the 

 base ; the lateral furrow very wide at the apex. The furrow down the side of the 

 second segment is wide and deep, and runs almost from the furrow on the petiole, but 

 ' is still separated from it. /The semicircular suturiform articulation is narrower than 

 /this furrow and terminates a very little beyond it, i. e. it does not reach the side of the 

 segment. The abdomen is not longer than the head and thorax together; broader 

 than the mesothorax, widening to the end of the third segment, whence it gradually 

 (but slightly) narrows to the apex. The cubitus is sharply elbowed near its origin ; the 

 first cubital cellule is about one third longer than broad on the lower side ; the second 

 cubital cellule is, on the upperside, about equal in length to the third, on the lower 

 side clearly longer than it. 



