24 HYMENOPTEEA. 



et tarsorum nigris ; genibus, tibiis tarsorumque basi albis ; alis flavo-hyalinis, apice fuseo, costa et stigmate 

 flavis. 

 Long. 9 millim. 



Hob. Guatemala, Cahabon, El Keposo {Champion). 



The antennae are as long as the abdomen, densely pilose, moderately thickened in 

 the middle, attenuated at the apex ; the pedicle of the scape is testaceous. The 

 sutures on vertex are deep and curved round the ocelli ; the frontal area is bluntly 

 pointed at the base, the sides curved, the apex open, the ocellus is surrounded with a 

 furrow ; the three antennal foveae are very large, the lateral rounded and wider than 

 the central, and have a rounded projection in the middle ; the central is longer than 

 wide ; the projection in the centre is widest at the apex. Clypeus rounded at the apex ; 

 the cheeks densely pilose. The mark on vertex only surrounds the ocelli. The trans- 

 verse radial nervure is received in the apical third of cellule ; transverse median before 

 the middle ; the third cubital cellule is much longer and wider than the second, and 

 double the width of base at the apex. There is a distinct bulla in the transverse radial, 

 and third and fourth transverse cubital and second recurrent nervures ; a double spurious 

 vein issues from the bulla on third transverse cubital ; a single one issues from near 

 the base of the first recurrent nervure to the bulla on second recurrent, where it 

 bifurcates into two. All the tarsi are black from the second joint. The front femora are 

 testaceous, except a black line at the base ; the middle are black to a little beyond the 

 middle ; posterior black, except the extreme base and apex. The apical two thirds of 

 the four posterior tibiae are black ; claws bifid ; spurs testaceous. 



The antennae are longer and thinner than in M. costalis ; the frontal area slightly 

 shorter; and the lateral furrows from it do not run down into the central antennal 

 fovea, although, as in M. costalis, there is a central depression running into it ; the 

 antennal foveae are larger ; the wings are more clouded at the apex, the bullae more 

 distinct, they being scarcely visible in M. costalis, which has besides no spurious veins ; 

 the femora are marked with black ; and it is also a narrower insect. 



7. Monophadnus interstitialis. 



Bufo-testaceus, antennis nigris, basi testacea ; pedibus testaceis, tibiis intermediis apice, posticis dimidio 

 apicali nigris ; alis flavo-hyalinis, apice fusco, nervis testaceis, nervo 2° recurrente interstitiali, costa et 

 stigmate testaceis ; foveolis frontalibus parvis. 



Long. 9 millim. 



Hah. Panama, Volcan de Chiriqui, 2000 to 3000 feet (Champion). 



The antennae are a little longer than the abdomen, but slightly thickened in the 

 middle, densely pilose, the third joint a little longer than the fourth, the apex not 

 attenuated, the scape testaceous. Sutures on vertex very shallow and indistinct ; 

 frontal area proper absent ; but there is a shallow pit in front of ocellus ; antennal 

 foveae small, shallow. Clypeus truncated at the apex ; ocelli surrounded with black. 



