MONOPHADNUS. 23 



distinctly attenuated at the apex. The sutures on vertex are deep ; the frontal area is 

 deep, well-defined, open at the middle on lower sides, a furrow issuing through the 

 open part from the ocellus ; fovea? scarcely indicated ; clypeus truncated at apex, but 

 with the edges rounded. The clypeus, labrum, and mandibles are testaceous ; there is 

 also a small brownish mark on the outer side of the frontal suture. The transverse 

 radial nervure is in apical third of cellule ; transverse median a little in front of middle ; 

 the first recurrent nervure is received in middle of the second cubital cellule, which is 

 considerably shorter than the third ; the apex of stigma is blackish, as are also the 

 nervures in front of it. 



This species comes near M. ochra, but is much larger and broader, the apex of abdomen 

 is black, and only the apex of the wings is fuscous, the transverse radial and recurrent 

 nervures are received further from the transverse cubitals, the space above the antennae 

 is not so hollow, and the frontal area is better marked at the apex. 



4. MonophadllUS fascipennis. {Strongylogasier fuscvpennis, Tab. I. fig. 17.) 

 Selandria fascipennis, Norton, Trans. Amer. Ent. Soc. iv. p. 84; Cresson, I. c. viii. p. 40, $ & ? \ 



Hab. Mexico 1 . 



5. Monophadnus costalis. 



Eufo-testaceus, antennis pilosis, nigris ; costa, abdominis apice tibiisque (basi excepta) nigris ; tarsis nigris, 



basi alba ; alis flavo-byalinis, apice leniter fusco, stigmate testaceo. 

 Long. 10 millim. 



Hab. Mexico, Valladolid in Yucatan (Gaumer). 



Antennse thick, pilose, shorter than the abdomen; third joint much longer than 

 fourth, four last joints abruptly shorter. Clypeus rounded at apex ; face covered with 

 long testaceous hair. Sutures on vertex shallow; frontal area small, oval, sharp at 

 base, the apex open, connected by a furrow with the central antennal fovea ; lateral 

 antennal fovea deep in the centre, but widening out round the edge. Third cubital 

 cellule more than double the length of second, which, on its lower side, is not much 

 longer than the first on its lower side ; it is angled where it receives the recurrent 

 nervure at the apical third ; the transverse radial nervure is received a little beyond 

 the middle ; transverse median a little in front of middle of cellule. The two posterior 

 tibiee are black, except at base, which is pale testaceous ; the anterior are only black 

 behind in the middle, at apex all round. Not much more than the half of the four 

 anterior tarsi are white, more than two thirds of posterior. The space surrounding the 

 ocelli is black. The claws are bifid. 



6. MonophadllUS annulipes. (Tab. I. figg. 3, 2; 3 a, maxilla; b, labrum; 



c, mandible.) 



Testaceus, antennis, vertice, macula supra coxas posticas, abdominis apice, femoribus postieis cum apice tibiarum 



