HYMENOPTERA FROM SARAWAK. 95 



base, black. "Wings clear -hyaline ; the stigma black, the ner- 

 vures paler. Abdomen black ; the apices of all the segments 

 testaceous ; the last segment almost entirely testaceous. 



This is an Agenia as now limited. The species recorded by 

 Smith from the Malay and Indian regions are probably mostly 

 referable to Pseudagenia, Kohl. The distinction between the 

 two consists in Agenin having a bundle of stiff bristles at the 

 base of the maxilla in the $ . 



SPHEGIDiE. 

 Amp ult. v striatifrons, sp. no v. 



Park green, largely tinged with blue ; the flagellum of the 

 antennae black ; the wings hyaline ; the radial cellule and the 

 space bounded by the first and third transverse cubital nervures 

 and the discoidal cellule smoky; the front with three stout, 

 longitudinal keels ; the space bounded by them is transversely 

 striated $ . 



Long : 12 mm. 



Hab. Kuching, Sarawak. 



Antennae black, covered with a pale pile ; the scape with 

 hardly any metallic tint. Head blue, the ocellar region largely 

 tinged with purple; the three keels in the front are stout and all 

 reach to the base of the mandibles; the part between them, from 

 near their top, bears stout, oblique striae ; the part on their 

 outer side at the top bears some large punctures ; the vertex is 

 sparsely and strongly punctured. The front ocellus is separated 

 from the hinder by a greater distance than these are from each 

 other, and the latter are separated from the eyes by a distinctly 

 greater distance than they are from each other. Clypeus dis- 

 tinctly keeled in the middle, green, smooth and thickly covered 

 with white pubescence. Mandibles brownish-black ; their middle, 

 on the lower side, with a row of large punctures. Pro thorax 

 elongate, the base distinctly narrowed ; it is sparsely punctured 

 and the middle of the pleurae bears a longitudinal furrow. The 

 central part of the mesonotum is strongly and deeply punctured; 

 the sides are more sparsely punctured, are coppery in colour and 

 are depressed behind. Scutellum and post-scute] lum sparsely 

 punctured. Median segment irregularly transversely striated ; 



