40 MR. P. CAMERON ON THE [May 7, 



wide. Petiole of abdomen long, slender, curved, not much dilated 

 towards the apex. 



The malar space is moderate ; the eyes reaching to the end of 

 the clypeal fovese, which are deep. Clypeus roundly convex ; not 

 separated by a suture above. Mandibles large, bidentate ; the 

 upper tooth is slightly smaller than the lower. Mesopleural 

 furrow wide and deep. Scutellum roundly convex, only keeled at 

 the base ; postscutellum bifurcate at the base. Median segment 

 armed with two long teeth ; it is moderately long. Palpi long ; 

 the second joint of the maxillary is dilated towards the apex. The 

 propleurse are stoutly keeled laterally in front. The head is 

 wider than the thorax ; it is obliquely narrowed behind the eyes ; 

 the occiput is sharply keeled. The seutellar depression is large, 

 deep, and bears two keels in the middle. 



The female has the antennae stouter than in the male, and they 

 are slightly thickened beyond the middle ; the abdominal petiole is 

 shorter and broader towards the apex ; the apex of the abdomen 

 is bluntly pointed ; the last segment (the 8th) is very short 

 above, belovv it is much moi'e largely developed ; the ovipositor 

 is not one-half the length of the abdomen. 



The metathoracic spiracles are small, oval, about twice longer 

 than they are broad ; the median segment is depressed at the 

 base, the seutellar and postscutellar furrows are deep and crenu- 

 lated. The last joint of the hinder tarsi is about equal in length 

 to the third. 



Skeatia albispina, sp. n. 



JSligra, facie, clypeo, mandibulis tarsisque albis; coxis trochanter- 

 ibusque anteriorihus pallide Jlavis ; alis fere hyalinis, nervis 

 stigmateque nigris. (S . 



Long. 13 mm. 



Hah. Bukit Besar, Malay Peninsula. 



Antennas black ; the 7th to 24th joints white beneath ; the 

 scape pale yellow in the middle below ; the scape is covered with 

 short pale pubescence. Head smooth and shining ; black ; the 

 face, clypeus, mandibles, and palpi pale yellow. Ocelli large. 

 Pront depressed ; a stout keel runs down its centre from the ocelli. 

 Eyes large, parallel. Mesouotum and scutellum smooth and 

 shining. Propleuras stoutly longitudinally keeled behind. Meso- 

 pleursB opaque and closely longitudinally striated, except on the 

 upper part behind. Metapleurse above closely, below more 

 stoutly, irregularly, and not so closely, reticulated. The meso- 

 sternal furrow is wide and deep, especially at the base, and is 

 closely striated. The base of the median segment is smooth and 

 shining ; there are a few narrow irregular striae on either side of 

 the central area ; the basal keels in the middle are curved and end 

 in a squarish area, which is stoutly keeled down the middle ; the 

 rest of the segment is stoutly reticulated ; the spines are long, 

 curved, and white. All the coxse are pale yellow (actually they 

 are testaceous yellow, but this may be owiug to discoloration) ; 



