10 HTMENOPTEEA. 



11. Strongylogaster melanosoma. 



Luteus, antennis pilosis ; antennis, eapite, mesonoto, metanoto, mesopleuris pedibusque 4 posterioribus fere 



totis nigris ; alia flavo-byalinis, apice fusco. 

 Long. 8| millim. 



Hob. Panama, Volcan de Chiriqui (Champion). 



The antennae are as long as the abdomen and half of the thorax; the third joint is 

 one fourth longer than the following, filiform, scarcely thickened towards the middle. 

 Labrum brownish ; three apical joints of palpi testaceous, the rest black. All the coxae 

 and trochanters are yellow ; the rest of the four posterior legs are black, save the knees 

 and metatarsi of the middle pair, which are testaceous in the middle; the anterior 

 femora are lined behind with black ; the tibiae have a black line interrupted behind in 

 the middle, the apex black all round; the tarsi black, save the basal three fourths 

 of metatarsus. The transverse radial nervure is received a little in front of the middle of 

 the third cubital cellule, the second recurrent is almost interstitial ; and the transverse 

 median is received in the middle of the cellule. Claws bifid. The vertex is conside- 

 rably raised, especially behind the ocelli, there being also a depression between the two 

 upper ones ; the frontal area is raised, is longer than broad, round at upper end, where 

 there is a small furrow leading into it ; the apex is more angled at the sides, and 

 transverse at the point. The lateral foveae are large, the central fovea smaller and with 

 a tubercle occupying it almost entirely. Eyes converging at bottom in front. 



Besides the difference in the colour of the mouth and thorax, S. melanosoma differs 

 from S. melanocephalus in having the transverse radial nervure received nearer the 

 middle of the cellule, the second recurrent nearer the second transverse cubital, and 

 the transverse median nearer the middle of cellule. 



12. Strongylogaster melanocephalus. (Tab. II. fig. 2, ? .) 



Luteus, nitidus, pilosus, eapite (ore excepto), meso- et metanoto fere totis, pedibusque 4 posterioribus nigris; alis 



flavo-byalinis, apice leniter fumatis, stigmate testaceo. 

 Long. 10 millim. 



Hab. Guatemala, Senahu in Vera Paz (Champion). 



Frontal area large, rounded at apex, narrower at base. Lateral foveae large, central 

 one not indicated ; but there is a semicircular suture above the antennal tubercle, which 

 is large. Eyes converging. The antennae are slightly longer than the abdomen and 

 metathorax, somewhat thickened towards the middle, attenuated at the apex, and 

 covered with a close, stiff, microscopic pile. The labrum, clypeus, and base of mandibles 

 are white. On the mesonotum the outside of the middle and the lateral lobes are 

 luteous, this being also the case with the metanotum at the sides. The anterior tarsi are 

 fuscous at the apex ; the rest of anterior legs pale yellow, as well as the four posterior 

 coxae ; trochanters and base of femora, the knees, and middle tibiae dull testaceous in 

 front; all the spurs are pale luteous. The costa is dull testaceous; the nervures 



