26 HYMENOPTEBA. 



Antennae scarcely pilose, shorter than the abdomen, thickened in the middle, last 

 four joints abruptly shorter and more globular than the preceding, third joint more 

 than one third longer than the fourth. Face long, lateral sutures on the vertex deep, 

 central faintly indicated. Frontal area small, oval, but a little wider at the apex ; 

 three antennal foveae large, but not very deep compared with their size, the lateral running 

 into the central at the lower end. Clypeus rounded at the apex. Eyes oblong, not 

 reaching to the mandibles. The transverse median nervure is received close to the 

 middle of the cellule, transverse radial in the apical third, second recurrent nervure 

 almost interstitial; third cubital cellule scarcely one half longer than the second; 

 there is a bulla in the transverse radial nervure, a fainter one in the second and third 

 transverse cubital, and one more distinct and longer in the second recurrent. The 

 accessory nervure in the hind wings shortly appendiculated ; the anterior tibiae are 

 testaceous in front ; the tarsi for the greater part of the same colour. The abdomen is 

 a half longer than the thorax and head; the saw issues from the fifth abdominal 

 segment ; the sheath black and pilose. The wings are clouded from a little behind 

 the apex of the stigma ; the nervures are testaceous. 



10. Monophadnus ochra. (Tab. II. fig. 7, s .) 



Selandria ochra, Norton, Trans. Amer. Ent. Soc. i. p. 249 l ; Catal. p. Ill, <£. 



Hab. Mexico, Cordova (de Saussure 1 ), Valladolid in Yucatan (Gaumer) ; Nicaeagua, 

 Chontales (Janson). 



I presume the specimens from Nicaragua and Yucatan are identical with Norton's 

 species ; but the characteristic alar neuration is not described. The transverse radial 

 and second recurrent (very nearly) nervures are interstitial ; the transverse median is 

 received considerably in front of the middle of cellule, which is a little longer than the 

 second. The vertical sutures are wide, the space between the ocelli and the eyes being 

 slightly hollowed; the frontal area is well defined, but open completely at the lower 

 end, the ridge curving towards the eyes ; the foveae are flat. 



11. Monophadnus violaceipennis. (Tab. II. fig. 8, tf : a, head; 6, posterior 



wing.) 



Mgro-cseruleus, ore, tarsis tibiisque pro parte albidis, alis nigro-violaceis. 

 Long. 9 millim. 



Hab. Guatemala, Panima (Champion). 



The antennae are pilose, as long as the abdomen, thickened from the fourth joint, 

 the third joint much longer than the fourth, the third and fourth joints thinner than 

 the succeeding, the apex scarcely attenuated. The sutures on the vertex are flat, broad 

 the frontal area ill defined ; a broad furrow runs from the lower ocellus to the central 

 antennal fovea, which is larger, but still smaller than the more rounded lateral ones 

 with which it is united by a broad furrow. The eyes are large, converging, reaching 

 to the base of the mandibles ; clypeus small, rounded at the apex ; labrum nearly as lono- 



