106 HYMENOPTERA FROM SARAWAK. 



middle, deeply and distinctly above. Thorax shining and 

 smooth; the mesonotum more opaque and closely punctured ; the 

 scutellum is more sparsely punctured, and has a narrow keel on 

 the basal half. The following are yellow : — a broad line on the 

 pronotum, fr\vo large marks, rounded behind, on the base of the 

 scutellum, abroad band, almost interrupted in the middle, on the 

 post-scutellum, a large broad band, widened below, on the sides 

 of the median segment, half on the metanotum, half on the pleurae, 

 a large oval mark below the tegulae and a large curved mark on 

 the lower side of the mesopleurae. Wings hyaline, the radial 

 and the apical two cubital cellules smoky; the second transverse 

 cubital nervure is slightly, roundly bent outwardly, the fourth 

 cubital cullule is half the length of the third. The front legs 

 are yellow, lined with black in front; the apical joints of the 

 tarsi are brownish; the middle legs are brownish-black; the 

 base of the tibiae, their apex more broadly and the base of the 

 tarsi more narrowly, yellow ; the four hinder coxae are broadly 

 yellow behind. Abdomen black; a large oval mark near the 

 middle of the second segment below ; a short line on the sides 

 of the ventral surface, a band near the base of the third segment 

 broadest on the sides, a mark on its ventral surface, rounded 

 on the outer side, a smaller one on the fourth and a narrow line 

 on the fifth dorsal segment, yellow. 



IscJuiogaster falvipennis, sp. nov. 



Black, with small yellow marks; the clypeus with two 

 marks above and one in the centre below and two small marks 

 on the apex of the median segment ; the legs and petiole dark 

 rufous ; wings fulvous ; the stigma testaceous ; the second 

 transverse cubital nervure is roundly curved ; the fourth cubital 

 cellule is fully half the length of the third. $ 



Long : 23 mm. 



Hab. Mt. Penrissen, Sarawak. 



Antennae black, the scape and apical joints brownish beneath, 

 the apical joints entirely so. Bead black ; an irregular mark 

 roundly narrowed below and ending in a joint, on either side of 

 the front, a longish mark on the upper half of the face, narrowed 

 and curved above, and there is a longish broad mark on the 

 centre near the apex, extending to the base of the tooth and 



