HYMENOPTRKA OF SARAWAK. 115 



Face and clypeus sparsely punctured and covered with 

 white pubescence, the front and vertex smooth and shining ; the 

 centre of the face above is roundly incised, the incision longer 

 than wide and with its sides projecting above. The raised cen- 

 tral lobe of the mesonotum is widely furrowed on the basal half. 

 Scutellar depression large, deep and with a stout keel in the 

 middle. Scutellum with the sides and apex keeled, the latter more 

 strongly than the former. Post-scutellum as wide as the scutel- 

 lum, depressed at the base, roundly raised, its sides keeled. Base 

 of metanotum with a large, somewhat semicircular area ; behind 

 this are 5 arere ; the central with stouter keels and slightly nar- 

 rowed towards the apex, the outer obliquely narrowed towards 

 the apex, almost triangular; the apex has an oblique slope and 

 is bounded by keels on the top and sides, there being none in the 

 centre. Pleuree almost impunctate; the oblique furrow on the 

 lower apical part of the mesopleurse is shallow ; and has a few 

 obscure keels ; on the lower side of the metapleurse in the middle 

 is a large projecting plate, dilated at the base, rounded at the 

 apex and hollowed in the centre above. Areolet rounded and 

 narrowed above ; the 2nd transverse cubital nervure has a short, 

 stout branch above the middle; the recurrent nervure is inter- 

 rupted at the top and above the middle leaving a small isolated 

 piece. 



Microdus natangensis, sp. nov. 



Rufous-luteous, the flagellum of antennas blackish ; wings 

 yellowish-hyaline, the nervures and stigma luteous, the latter 

 black at the base, where there is a small equare fuscous cloud, 

 extending shortly beyond the cubitus ; the basal three abdominal 

 segments closely longitudinally striated, the 2nd with a trans- 

 verse, slightly curved, furrow shortly beyond the middle. 5 • 



Length 13 mm. » 



Hab. Matang 



Head, pro- and mesothorax smooth and shining ; parapsidal 

 furrows smooth. Base of metanotum depressed; in the centre are 

 two keels, which are close together on the basal third, then 

 expand obliquely outwardly, then running straight to the apex. 

 Abdominal petiole smooth and obliquely depressed at the apex, 

 the middle is depressed. 



R. A, Soc, Noi 44, 1905. 



