HYMENOPTERA FROM SARAWAK. 45 



This species is nearly allied to S. nigricans, it is smaller, has 

 the mesonotum impunctate, not strongly punctured ; there are 

 only two central areas on the median segment, and the basal 

 area is longer than wide, not wider than long. 



Rhyssa nigritarsis, sp. nov. 

 \ 



Nigra, late flavo-maculata ; abdominis apice late brunnea ; 

 pedibus flavis, tibiis femoribusque nigro lineatis ; tarsis posteri- 

 oribus nigris ; alis hyalinis, stigmate testaceo 5 . 



Long : 17 mm. 



Hab. Borneo (Shelford). 



Antennae black, the scape yellow beneath. Head black, 

 the face entirely ; the inner upper orbits to the ocelli, and the 

 outer entirely, yellow. Face almost smooth, sparsely pilose, 

 shining. Clypeus brownish ; in the centre, at the apex, is a short, 

 broad tooth with an indistinct tubercle on either side of it ; above, 

 on either side, is a fovea. On the thorax the following parts are 

 lemon-yellow ; the sides and base of the pronotum ; the basal 

 two thirds of the scutellum, the post-scutellum, the median 

 segment, except at the base and sides ; the tubercles and a large 

 oblique line below them. The transverse striation, on the 

 mesonotum does not extend to the apex ; the scutellum is closely 

 rugose ; the median segment is smooth and shining, its base is 

 depressed and black. The fore legs are yellow ; the femora are 

 brownish behind ; the fore tibiae are as long as the basal joint of 

 the tarsi ; the middle coxae, femora and base of tibiae are lined 

 behind with black ; the four hinder tarsi are black ; the hinder 

 coxae are broadly black below and laterally ; the femora are 

 broadly black above ; the tibiae black, with a narrow yellow band 

 near the base and a broader one at the apex. The basal two 

 dorsal segments of the abdomen are black, lined with yellow 

 down the centre ; the third is brownish-black, banded with black 

 near the middle ; the others are brownish ; on the fourth segment 

 is a broad yellow band near the middle ; the fifth is indistinctly 

 yellow near the apex. The basal half of the ventral surface 

 is pale yellow, marked with black ; the apical brownish. 

 The pedicle of the areolet is nearly as long as the basal 

 abscissa. 



