118 HYMENOPTERA OF SARAWAK. 



have the 5th to the 20th joint white, spotted with black 

 above. Wings hyaline, the nervures and stigma black. 9 . 



Length 11 mm. ; terebra 2 mm. 



Kuching. December and March. 



Face strongly, the clypeus more weakly punctured. Front 

 and vertex smooth and shining ; the frontal spines are stout, 

 about twice longer than they are thick at the base. Mesono- 

 tum rugosely punctured, shining ; the parapsidal furrows are 

 shallow, crenulated. Scutellum flat, sparsely punctured, except 

 at the apex ; the post-scutellum smooth, shining. The 

 metanotum behind the keel is transversely striated -punctured ; 

 the rest coarsely, closely reticulated ; the spines are about twice 

 longer than they are wide at the base ; their apex is rounded. 

 Pleurae closely strongly punctured ; the lower half of the pro- 

 pleurae strongly, closely striated ; the apex of the mesopleurae is 

 irregularly striated. Scutellum flat. Metanotum with one 

 transverse keel, and with a closed area, longer than wide, in the 

 middle at the base. Temples very short, almost obsolete at the 

 top behind the eyes. Malar space distinct, half the length of 

 the antennal scape. Transverse median nervure interstitial ; 

 the recurrent nervure is received near the apex of the areolet. 

 Transverse median nervure in hind wings broken shoitly be- 

 low the middle. Tubercles small. Post-petiole widely dilated ; 

 the base of the petiole wider than the height of the sides. 



The 6 is similarly coloured, except that the marks on the 

 pleurae are smaller ; the antennae are much longer than the 

 body, the post-petiole is narrower, longer compared with its 

 width ; the antennae are not serrate and are broadly white in 

 the middle. 



This species does not appear to differ much in generic 

 characters from the neotropical species of Poly anus ; the only 

 differences appear to be that in the American the transverse 

 median nervure is not interstitial, but received behind the 

 transverse basal ; that the temples are longer, and distinctly 

 obliquely narrowed, that the scutellum is not so flat, that there 

 is no distinct area at the base of the metanotum, and that the 

 abdominal petiole is longer, narrower and not nearly so much 

 widened at the apex. 



Jour. Straits Branch 



