350 HYMENOPTEEA. 



furrow. Wings dark smoky, the stigma dull fuscous, lighter on the lower side ; the 

 recurrent nervure interstitial. 



31. Iphiaulax chontalensis. 



Flavo-testaceus ; capite, antennis pedibusque nigris ; alis fere fumatis, apice fuscis. $ . 

 Long. 8 miliim. ; terebra 5 millim. 



Hab. Nicaeagua, Chontales (Janson). 



Face coarsely punctured, covered (as are also the sides) with longish white hair ; front 

 scarcely depressed ; a deep furrow going down from the ocelli. Petiole with the inner 

 furrow wide, shining, impunctate, curving round, and much widened at the base, so that 

 the centre is somewhat triangular at the apex ; outer furrow narrower, deep. Second 

 segment with a deep oblique depression on each side ; a keel down the centre (but not 

 reaching to the apex) arising from a broad base, and with a deep depression on each 

 side, and a few oblique striations. Suturiform articulation wide, deep, coarsely longi- 

 tudinally striated, the lateral branches narrow ; second transverse furrow much narrower, 

 becoming united to the base of the segment a little before the sides are reached, coarsely 

 striated ; the third furrow much shallower. 



Differs from I. montezuma in being smaller, the wings darker at the apex ; the petiole 

 subvertical, the abdomen shorter, the basal part of the keel on the second segment 

 longer; the second segment not distinctly striated at the base, the second furrow 

 deeper and waved ; and the colour of the body lighter and (especially the abdomen) of 

 a yellower hue. 



j3. The oblique depressions on the second segment impunctate and not striated, the segment 

 itself not striated; suturiform articulation only striated in the middle. The 

 second cubital cellule longer than the third, at least on the lower side. (Species 

 32.) 



The long and comparatively narrow abdomen of this species separates it readily from 

 the others recorded here. 



32. Iphiaulax abaculus. (Tab. XIV. fig. 23, ? .) 



Rufo-testaceus ; antennis, capite, prosterno pedibusque, nigris ; alis fumatis, stigmate nigro ; antennis 



longis. $ . 

 Long. 9 millim. ; terebra 7 millim. 



Eab. Costa Rica, Cache (Rogers). 



Antennae nearly as long as the body, slightly microscopically pilose, of nearly equal 

 thickness throughout. Face and sides of the head covered with long white hair ; front 

 but slightly depressed in the middle ; the furrow rather broad and shallow. Head not 

 much developed behind the eyes (which are large, oval, and margined), and narrowing 



