38 Cameron, Hymenoptera Orientalia. 



This genus has the neuration of Siobla or Selandria, 

 except that in the latter the basal nervure is united to 

 the cubital. It differs markedly from both in the long, 

 slender antennae, in the incised apex of the clypeus, in the 

 frontal area being sharply and clearly bounded by distinct 

 keels, and in it being united to the eyes by a keel. The 

 wings are rather longer than usual, the costa is not so 

 much dilated before the stigma as in Selandria, the sutures 

 on the vertex are distinct, narrow, but deep ; the head 

 moderately developed behind the eyes, but not quite so 

 much so as in Siobla. It is further a much more slen- 

 derly built insect than Siobla or Selandria, more like 

 Stromocerus. 



BUSARBIA VIRIDIPES, Sp. nov. 



Nigra; scapo antennarum, linea pronoti, tegulis niacii- 

 laque mesopleurali albis ; pedibus pallide viridibus. $ . 



Long, fere 6 mm. 



Antennae filiform, longer than the abdomen, black ; the 

 basal joint white; the flagellum covered with short, stiff, 

 black pubescence ; the third and fourth equal in length. 

 Head black, the clypeus, labrum, the base of the mandibles 

 broadly, and the palpi, white ; shining, impunctate ; the 

 frontal area with some obscure striae. Thorax shining, 

 impunctate ; the hinder part of the pronotum broadly, 

 the tegulse, a large oblique mark on the hinder part of the 

 mesopleurae — broad at the base, gradually narrowed 

 towards the apex — clear white. Wings large, hyaline, 

 the nervures black, the lower part of the stigma fuscous. 

 The second cubital cellule is distinctly longer than the 

 third; and receives the recurrent nervure near to the apex; 

 the second shortly before the middle of the cellule ; the 

 basal nervure shortly before the middle ; the radial 

 nervure curved above, its lower part almost perpendicular. 



