40 HTMENOPTEEA. 



longitudinal black lines on the vertex; and the pectus is more or less black. The 

 antennae are shorter and thicker, the frontal area is truncated, not rounded at the apex, 

 and the sheaths of the saws are entirely black. 



15. Hylotoma aimulipes. (Tab. I. figg. 2 ; 2 «, maxilla.) 



Lutea, antennis (basi excepta) abdominkque apice nigris ; ore facieque albidis ; vertiee pro parte nigro, vel toto 

 testaceo ; pedibus nigris, eoxis, trochanteribus femoribusque anterioribus dimidio apicali testaceis, tibiis 

 anterioribus fere totis, posterioribus basi et basi tibiarum laete albidis'; alis flavo-hyalinis, apice laete 

 fumatis. 



Long. 9-10 millim. 



Hab. Guatemala, San Geronimo {Champion) ; Panama (Boucard). 



The antennae are as long as the abdomen, closely and densely pilose. The frontal 

 area is semitruneated behind, six-angled ; the antennal fovea is wide, and tapers gradually 

 to the point ; there is no tubercle at the base. The clypeus is roundly incised. In 

 the female the vertex is more or less marked with black, the ground-colour being 

 brownish testaceous ; sometimes the black is entirely absent. The face from below the 

 frontal area is white, as are also the mandibles. The third cubital cellule is broader 

 than long ; at the top and bottom of the second and third transverse cubital nervures 

 are two bullae ; from each bulla on the second nervure runs a spurious vein, which joins 

 the bullae on the third nervure. The second recurrent nervure is received a little past 

 the second transverse cubital ; the basal nervure, costa, and stigma at the base are 

 testaceous ; from the apical half of the stigma they are fuscous ; at the extreme base 

 of the wings the nervures (save the costa itself) are deep black. The amount of black 

 on the apex of the abdomen varies ; usually the four apical segments are black above 

 and at the sides, but not beneath ; the sheath of the saw and the cerci are testaceous. 



The intensity of the fuscous colour of the apex of the wings varies ; the third trans- 

 verse cubital nervure is curved. The spurs are pale. 



The male is similar, save that the vertex and the head behind are quite black. 



16. Hylotoma tripartita. 



Lutea, vertiee, macula magna pleurali, abdominis apice, coxis posticis, femoribus, tibiarum posteriorum basi 



tarsisque nigris, tibiis albidis ; alis flavescenti-byalinis, apice fumatis. 

 Long. 12 millim. 



Hab. Panama, Bugaba (Champion). 



In the only specimen I have the flagellum is broken off; the scape is testaceous. 

 The frontal area is longer than broad, truncated before and behind, six-angled ; the 

 antennal field is deep, sharply pointed at the apex ; at the base is a roundish fovea. 

 From the frontal area a ridge runs towards the eyes. The second cubital cellule is 

 about one third longer than the third, which is dilated at the apex. All the knees are 

 white ; the anterior femora are testaceous in front on the lower side, and the anterior 

 tarsi are testaceous at the base. The middle of the head behind is obscure testaceous. 



