KHOGAS. 391 



notum are distinct ; only the lateral keels are present on the metathorax. The basal 

 segments of the abdomen are longitudinally striated, and keeled in the centre. In the 

 male (R. bugabensis) the petiole is very narrow, petiolated in fact, and thus differs 

 still further from the typical Rhogas. As will be seen, the two species differ in 

 neuration. 



a. Transverse humeral nervure received in the middle of the first discoidal cellule; 



the recurrent nervure at a little distance in front of the first transverse cubital 

 nervure; the second cubital cellule of equal width throughout, a little shorter 

 than the first. Ovipositor short, scarcely projecting. 



4. Ehogas melanocephalus. 



Luteus, capite nigro, antennis fuscis ; alis fere fumatis, stigmate fusco. $ . 

 Long. 7 millim. 



Eab. Mexico, Cordova (SallS). 



Antennae longer than the body, shortly and densely pilose, 43-jointed. Face finely 

 transversely striated. Thorax scarcely, if at all, punctured above, obsoletely longi- 

 tudinally striated ; pleurae shining and impunctate in the centre ; a stout transverse keel 

 at the base of the metanotum, a narrower keel down the centre and at either side. 

 Abdomen a little shorter than the head and thorax united ; the basal segments rather 

 strongly longitudinally striated, keeled down the centre, and margined laterally ; the 

 apical segments impunctate, shining ; the ovipositor short, black. The transverse 

 humeral nervure is received in the middle of the first discoidal cellule ; the recurrent 

 nervure a little distance in front of the first transverse cubital nervure. 



b. Recurrent and transverse humeral nervures almost, if not quite, interstitial ; the second 



cubital cellule much longer than the first, and not much shorter than the third ; 

 the cubital nervure obliterated a little beyond the third cellule. Abdomen subpetio- 

 late, clavate at the apex. 



5. Ehogas bugabensis. (Tab. XV. fig. 23, <$ .) 



PaHide flavus, abdomine antennisque luteis, mesonoto nigro ; alis fere hyalinis, stigmate testaceo. S • 

 Long. 12 millim. 



Eab. Panama, Bugaba (Champion). 



Antennae 73-jointed, longer than the body ; densely pilose, the pile much longer 

 towards the apex. Head and thorax shining, impunctate. Abdomen rather strongly 

 longitudinally striolated (except at the apex), the two basal segments margined, more 

 than twice the length of the head and thorax united; petiole long and narrow, 

 margined laterally. Body and legs covered with pale hair. The transverse humeral 

 nervure is received not far from the transverse basal nervure ; the recurrent nervure 



