48 Mr. G. Meade-Waldo on 



two conspicuous marks on median segment, yellow. Head 

 and thorax bluish black, abdomen jet-black. Wings suffused 

 with a dark purple effulgence. Tibiae and tarsi covered with 

 a short, thick, golden pubescence, almost yellow in some lights. 

 Clypeus snbtriangular truncate ; mesonotum with two short 

 and conspicuous longitudinal furrows, median segment with 

 a deep medial longitudinal groove widening at the apex, the 

 apex on each side produced to form a small emargination 

 with conspicuous teeth on each side, sides of median segment 

 forming ridges. Petiole of abdomen flat dorsally, a small 

 tubercle on each side beneath. Punctured; head, pronotum, 

 mesonotum in front, and part of petiole rather coarsely 

 granular, rest of thorax and abdomen (except petiole) 

 minutely and sparsely punctured, petiole coarsely striate on 

 dorsal surface. 



Length 22 mm. 



Hab. Sumatra {A. R. Wallace) ; 1 ? . 



Seems to be rather nearly allied to M. orient alls, Grib., 

 from Pulo Laut, but differs in having the head coarsely 

 granular and in many respects in colour- pattern. The 

 two curious emargiuations on the apex of the median seg- 

 ment are quite peculiar to the species. 



Nortonia, Sauss. 

 Nortonia gilberti, Turner. 



Euchalcomenes gilberti, Turner, Trans. Ent. Soc. 1908, p. 90. 



The mouth-parts are those of a normal Nortonia, a fact 

 noticed by Turner after his description was in the press. 



Pachymenes viridis, Smith, Journ. Proc. Linn. Soc. Lond., 

 Zool. vol. iii. p. 163, from Key Island, and P. elegantula, 

 J). T.j Cat. Hym. vol. ix. p. 23, from Batchian, stated by 

 Turner as belonging to the genus Euchalcomenes con- 

 sequently come into Nortonia. 



Thus the genus Euchalcomenes, Turner, sinks as a synonym 

 of Nortonia. 



Nortonia elegans. Smith. 



Eumenes elegantula, D. T. Genera Tnseetoruin, fasc. 19, Hymerioptera, 



Vespidae, p. 22. 

 pachymenes elegans, Smith, Journ. Proc. Linn. Soc. Lond., Zool. Suppl. 



p. 131 (I860)*. 



Nortonia viridis, Smith. 



Pachymenes viridis, Smith, Journ. Pice. Linn. Soc. Lond. vol. iii. 

 p. 163 (Aru). 



