346 HYMENOPTEEA. 



tion sometimes obsolete ; face closely but not coarsely punctured, bearing longish hair. 

 Thorax shining, impunctate, the sides covered with longish hair. Petiole deeply 

 depressed at the base ; the inner furrow broad, but not very deep, and with a few trans- 

 verse broad keels in the middle ; the outer keel deeper and crenulated. Second seg- 

 ment with a triangular furrow in the centre, the apex of which reaches a little beyond 

 the middle ; laterally (but not reaching to the base) are two oblique deep depressions, 

 which sometimes bear two transverse keels ; the transverse furrow broad and shallow, 

 especially shallow in the middle. Suturiform articulation shining, impunctate ; the 

 basal branch shallow, indistinct. The furrows on the third and fourth segments impunc- 

 tate ; the fifth segment in part and the apical six segments are black. Stigma 

 ochraceous at the base ; in the first cubital cellule there is an oblique cloud, which is 

 continued into the first discoidal cellule. 



Yv 26. Iphiaulax piliventris. (Tab. XIV. fig. 9, $ .) 



Mger ; abdominis segmentis l°-4 m runs ; alis nigris, basi fere hyalinis, stigmate nigro, basi ochraceo. $ . 

 Long. 12 millim. ; terebra fere 3 millim. 



Hob. Panama (Boucard). 



Antenna? stout, of nearly equal thickness, microscopically pilose. Head densely 

 covered with longish hair, whitish on the face, fuscous on the vertex ; broadly excavated 

 above the antennas; ocelli surrounded by a furrow; face aciculated. Pleurae and 

 metathorax covered with long pale hair. Petiole excavated at the base ; the inner furrow 

 commencing at the end of the excavation, from which it is clearly separated, about three 

 times longer than wide, and with two transverse keels in the centre ; the outer furrow 

 half the width of the inner one, the separating keel sharp ; the central part a little longer 

 than wide. There is a shining, impunctate, triangular area in the centre of the second 

 segment at the base, surrounded by a furrow, which is widest and deepest at the apex, 

 and is continued as a wider oblique furrow down the side. Suturiform articulation 

 wide and moderately deep, not striated; the furrow on the third segment deep, 

 especially at the side, the one on the fourth segment narrow, but fully as 

 deep. 



Differs from I. suavis in having the abdomen broader ; the depression surrounding the 

 area on the second segment continuous, and not on the apical part only, its deeper 

 apical part being also much less in size; the basal third of the wings subhyaline 

 (those of /. suavis being uniform in tint), and the base of the stigma more broadly 

 ochraceous. 



