4 Cameron, Hymenoptera Orientalia. 



Head large, subquadrate, very slightly narrowed 

 gradually behind the eyes; black; the vertex broadly in 

 the middle, and the front broadly, in the centre to the 

 middle of the eyes, red, sparsely covered with long, fuscous, 

 intermixed with shorter silvery, hair ; the front and vertex 

 strongly and distinctly longitudinally striolated, the striae 

 running into coarse punctures over the antennae ; the striae 

 behind the eyes stout, sharp, slightly oblique, and not 

 extending below the level of the eyes; the antennal tuber- 

 cles very smooth, rufo-piceous. Oral region piceous-red; 

 the clypeus in the middle incised, the sides of the incision 

 forming two stout projecting teeth. Mandibles ferru- 

 ginous; the teeth black; except at the apex, sparsely 

 covered with long, pale golden hair; thorax at the base very 

 slightly narrower and not very much longer than the head, 

 of nearly equal width throughout ; the mesonotum, except 

 at the base and at the sides, rufous, the black on the base 

 being broader than on the sides, very coarsely longitu- 

 dinally reticulated, the reticulations becoming wider and 

 larger towards the apex ; the median segment with an 

 oblique slope ; reticulated, the reticulations much larger 

 than on the mesonotum. The sides of the mesonotum above 

 with projecting teeth ; those at the base indistinct ; the 

 central very large, straight, sharp at the apex ; that behind 

 it blunt, curved, longer ; the teeth on the median seg- 

 ment finer, curved, five in number ; the central being 

 the longest. Pleurae not excavated, smooth, shining, im- 

 punctate ; the propleurae at the apex piceous ; the base of 

 the meso- and the meta-pleurae thickly covered with 

 longish, silvery pubescence. Antennae longish, distinctly 

 tapering towards the apex ; the under side of the 

 scape of the second, and of the base of the third joint, 

 rufous ; the scape punctured, thickly covered with longish 

 silvery hairs ; the flagellum thickly covered with a silvery 

 down ; the third joint twice the length of the fourth. 



