DESORIPTiONS OF NEW BYMENOPTERA. 289 



species in having the median segment more regularly reticnlated ; the 

 " enclosed area " at its base is not of a triangular form and extends to 

 the sides, while in the other species it is confined to the centre and is 

 more regularly bordered by furrows; the segment itself is larger com- 

 pared to the rest of the thorax ; the petiole is longer than usual and is 

 more distinctl}^ dilated at the apes. In the hind wings the apical ner- 

 vures are obliterated ; the transverse anal nervure is received behind the 

 cubital, the discoidal nervure being obliterated entirely. In the fore- 

 wings the transverse basal nervure is received shortly behind the trans- 

 verse basal. 



PSEN KETICDLATUS, sp. nov. 



Niger; nitidus, capite thoraeoque dense albo pilosis ; alis hyaliuis, 

 nervis stigmatique nigris, $ et <J. 



Lo7ig : 10-11 m.m. 



Habitat : Deesa. 



Scape of autennse bearing white hairs ; the flagellum densely covered 

 with white pubescence. Front and vertex smooth and shining ; cover- 

 ed with longish white hair ; the face and clypeus densely covered with 

 silvery pubescence, which is more dense on the face than on the clypeus. 

 The clypeus is broadly roundly convex ; its apex broadly projects in 

 the middle ; the projecting part has a broad, shallow incision ; its sides 

 are oblique. Thorax smooth and shining ; the basal area of the median 

 segment is stoutly longitudinally keeled, except in the middle, where 

 there is a wide shallow furrow, which is bordered by keels, becomes 

 wider gradually towards tlie apex and bears a few transverse keels at 

 the base ; in the middle are a few stouter keels, from which the furrow 

 is continued to the apex of the segment ; on the apical slope is, on 

 either side of this furrow, a large shallow somewhat semicircular furrow, 

 bordered on the inner side by a stout keel ; from the centre of this 

 area two stout keels run to the sides, these being divided by an 

 irregular curved one in the centre. The basal furrow on the meso- 

 pleurse is crenulated, the longitudinal one is smooth and narrower. The 

 apex of the metapleura? is bordered by a keel, beyond which is another 

 more irregular one, the tvvo enclosing between them the stigma, below 

 which are three or four stout keels. Wings clear hyaline; the second 

 recurrent nervure is interstitial. Legs covered with long soft white 

 hair ; the spurs are pale. Abdomen smooth and shining ; the long- 

 ourved petiole is covered with long white, soft hairs. 



