20 Cameron, Hymenoptera Orientalia. 



much beyond the middle of the abdomen, slightly 

 infuscated, the nervures testaceous, the stigma black; 

 at the top the second cubital cellule is slightly wider 

 than the space bounded by the first transverse cubital 

 and the second recurrent nervures. Legs sparsely 

 covered with white pubescence ; the apex of the femora, 

 tibiae and tarsi, testaceous ; the hinder tibiae infuscated. 

 Abdomen shining. 



DlDINEIS ORIENTALIS, Sp. 110V. (PL l6, f. 2). 



Niger, mandibulis, scapo antennarum subtus, tibiis, tavsis 

 tegidisque albidis, alts hyalinis, nervis fastis. 6. Long. 

 5 mm. 



Hab. Barrackpore (Rothney). 



Antennae fuscous, darker above, the scape bearing a 

 few hairs, the flagellum thickly covered with short pile ; 

 the base of the apical joint before the base of the 

 curve projecting. Head shining, the vertex with shallow 

 closely-pressed punctures, and covered with longish 

 blackish hair ; the vertex with the hair shorter and 

 closer ; the cheeks and clypeus thickly covered with 

 silvery hair, that on the clypeus being the longer. 

 Mandibles with longish silvery hair ; their base black, 

 the rest piceous, with a yellow band between ; the palpi 

 yellow. Thorax black, shining, closely covered on the 

 pro- and meso-thorax with black hair ; almost impunc- 

 tate ; the depression on the propleurae with a few stout, 

 oblique keels. In the centre of the median segment is 

 a large somewhat triangular area, but with the apex 

 rounded, bounded by stout keels, and having in the 

 centre of it two slightly diverging keels, which reach 

 a little beyond the middle. From the apex of the 

 triangle a straight keel runs down to the apex of the 

 segment, and in the centre at the side is a somewhat 

 semicircular area, which is joined to the central keel 



