HYMENOPTERA OF SARAWAK. 119 



Tosquinet, it may be added, has described a species 

 P. cingulatus which he referes to Poly anus from New Guinea, 

 (cf. Mem. de la Soc. Ent. de Belg. X. 45). Poly anus may be 

 described as a Skeatia with 2 spines placed side by side on the 

 front and with the parapsidal furrows less distinct. 



SPHEGIDiE. 

 Sphex (Isodontia) Hetvitti, sp. nov. 



Black, the apex of the 2nd abdominal segment narrowly, 

 the apical half of the 3rd and the whole of the following 

 abdominal segments, the face, clypeus, lower inner orbits, and 

 tubercles covered with silvery pubescence ; the hair on the 

 head long, dense, fuscous, it is longer on the vertex and on the 

 outer orbits below, than else where '> the hair on the mesonotum 

 is short, dense and fuscous ; it is sparser and shorter on the 

 scutellum and as dense and longer on the median segment. 

 Basal segments of abdomen bare, the apical densely covered 

 with bright fulvous pubescence. Wings almost hyaline, highly 

 iridescent, the radial cellule and a brown band (extending to 

 the 2nd recurrent nervure) round the apex fuscous tinged with 

 violaceous. 6 . 



Length 28 mm. 



Kuching. March. 



Eyes slightly, but distinctly converging at the top. The 

 posterior ocelli, oh the outer side, are united to the anterior 

 by a narrow furrow, from the anterior a narrow one runs 

 down to the antennas. The vertex and upper part of the front 

 one finely, but not closely, punctured. Clypeus broadly, 

 roundly, uniformly, convex ; its apex almost transverse ; there 

 is a minute depression at the apex, shallow and hid by the 

 pubescence. Mandibles bidentate, the teeth large, diverging, 

 the lower longer and sharper than the upper. Pronotum 

 placed below the level of the mesonotum and clearly separated 

 from it ; its apex broadly depressed, obliquely depressed to- 

 wards the mesonotum. Mesonotum somewhat strongly, but 

 not deeply punctured ; the scutellum is a strongly punctured 

 and has a narrow smooth line down the middle. Post-scutel- 



B. A. Soc., No. 46, 1906. 



