IPHIAULAX. 377 



nervure is interstitial ; the second cubital cellule is nearly as long as the third. The 

 legs are rather bare. 



The following species differs from Iphiaulax and Bracon in the form of the body, and 

 may perhaps form the type of a new genus. The thorax is long and flat above. The meta- 

 thorax is especially long, and has a rounded, comparatively flat slope, and wide and deep 

 lateral furrows ; on the inner side of the furrow is a row of large foveae, and a furrow 

 runs down the centre of the metanotum. The abdomen is shorter than the thorax, 

 and is sessile, the petiole being broad and scarcely narrower at the base. The suture 

 between the petiole and the second segment is wide, deep, and transverse. The suturi- 

 form articulation is slightly curved ; its basal branch straight, sharply oblique, and 

 joined to the furrow at the base of the segment. The lateral depression on the second 

 segment is absent. The last ventral segment is deeply incised. The legs are stout ; 

 the hind femora thickened ; the tarsi a little shorter than the tibiae ; the metatarsus 

 not much longer than the second joint. The wings are as in Bracon. 



^JflO. Iphiaulax (?) multicarinatus. (Tab. XV. fig. 12, $ .) 



Niger, abdominis segmentis l°-5 m runs ; alis fuliginosis. $ . 

 Long. 12 millim. ; terebra 5 millim. 



Hab. Nicaeagua, Chontales (Janson). 



Antennse stout, tapering towards the apex, longer than the body ; scarcely micro- 

 scopically pilose. Face coarsely, rugosely punctured, and with an irregular hollow in 

 the centre ; the rest of the head smooth, shining. Thorax smooth, shining, the lateral 

 suture canaliculated ; metathorax at the lateral sutures marked with some large, round, 

 shallow punctures ; metanotum with two fine keels going down the centre, and at 

 the apex bearing three depressions, the central depression shallow and somewhat 

 triangular, the lateral ones larger, deeper, and oblong. Petiole broad, the central part 

 raised and bordered by a rather wide furrow ; longitudinally striated, except at the 

 apex ; separated from the second segment by a narrow and somewhat deep furrow, in 

 front of which on either side is another oblique narrow furrow almost uniting it with 

 the narrow and shallow suturiform articulation. In the centre of the second segment 

 are two rather long keels, bordered by two shorter ones on either side. The remainder 

 of the abdomen is smooth and shining. The recurrent nervure is interstitial ; the 

 second cellule is double the length of the radial nervure in front of the first transverse 

 cubital nervure. 



The described species of this section of Braconidse from our region are only three in 

 number ; I prefer to place them here, as they may belong either to Bracon (sensu 

 stricto) or to Iphiaulax. 



biol. CENTE.-AMER., Hymenopt., March 1887. 3 cc 



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