342 HYMENOPTEEA. 



A* The base of the wings and a fascia below the stigma yellow. Suturiform articulation 

 not striated. Body and legs entirely rufous. (Species 19.) 



19. Iphiaulax hector. (Tab. XIV. fig. 5, $ .) 



Ferruginous ; antennis verticeque nigris ; alis flavo-hyalinis, fascia medio apiceque fuscis, stigmate flavo. $ . 

 Long. 14 millim. ; terebra 7 millim. 



Hab. Panama (Boucard). 



Antennae scarcely so long as the body, microscopically pilose. Face rugose ; vertex 

 largely depressed between the ocelli and the antennae, the depression reaching to the 

 €yes and blistered ; ocelli surrounded by a depression which is rounded at the apex, 

 but narrower there than at the base ; a furrow leads down from thq depression to the 

 antennae. Thorax smooth, shining, impunctate ; scutellum not much raised above the 

 mesonotum, but considerably so above the metanotum ; the base transverse, the apex 

 narrowed and rounded. Petiole largely and deeply depressed at the base ; two broad 

 and deep furrows along each side, the inner one the widest, and both separated from 

 the basal depression. Second segment with two deep curved depressions on each side, 

 and, in the centre, a depression enclosing a triangular field ; the transverse furrow at 

 the apex is deep, and, at the sides, curves back to join the lateral depression, and from 

 its centre another and wider depression runs to the side in the opposite direction. The 

 transverse furrow in the third segment is slightly wider than that in the second. The 

 apical cloud in the fore wings commences at the apex, and the middle one ends at the 

 base of the stigma, the latter commencing a very little beyond the transverse basal 

 nervure ; in the hind wings the cloud commences opposite the base of the middle cloud 

 in the fore wings ; second cubital cellule slightly shorter than the first, the third being 

 nearly as long as the other two united. 



B. Wings entirely black. (Species 20-24.) 



* Abdomen impunctate. (Species 20-23.) 

 a. Thorax red. (Species 20-22.) 



a. Legs entirely rufous. (Species 20.) 



20. Iphiaulax guatemalensis. (Tab. XIV. fig. 8, 2 .) 



Luteus ; antennis capiteque nigris ; alis fumatis, stigmate flavo. $ . 

 Long. 12 millim. ; terebra 6 millim. 



Hab. Guatemala, San Geronimo (Champion). 



Antennae stout, microscopically pilose ; third joint nearly double the length of the 

 fourth. Face rugose ; vertex aciculate, not depressed above the antennas ; ocelli sur- 

 rounded by a narrow furrow, which is rounded at either end, but broadest at the base ; 

 a furrow runs down to the antennas. Thorax shining, impunctate ; scutellum longer than 

 broad, narrowed towards the apex. Petiole depressed in the middle at the base ; two 



