Hymenoptera Orientalis. 281 



is received slightly beyond the middle of the radial cellule. 

 Tibial spurs slender, curved, reaching to the middle of the 

 metatarsus. Abdominal segments lined with silvery pubes- 

 cence. Length nearly 8 mm. 



May be known from 0. argenteolineatus and nitidus by 

 the reddish legs and by the longer and thinner calcaria. 



OXYBELUS NITIDUS, Sp. nov. 



Head smooth, shining, covered with a silvery pubescence, 

 very densely on the clypeus and cheeks, the front excavated 

 in the middle, glabrous. Ocelli in a curve, the hinder 

 separated from each other by only a little greater distance 

 than they are from the eyes. A curved, oblique shallow 

 depression runs from the outer ocelli to the eyes. Clypeus 

 broadly convex, yellow ; mandibles yellow, piceous-red at 

 the apex, eyes hairy. Antennae densely covered with 

 silvery pubescence ; the scape yellow, the third and fourth 

 joints equal. Thorax smooth, shining, covered with soft 

 pale pubescence ; the pronotum transverse, rounded at the 

 sides. Mesopleural furrow crenulated ; medium segment atthe 

 base, with short stout keels, bounded by a narrow keel which 

 proceeds to the apex, the sides of the segment being also 

 keeled. Metapleurse excavated at the base, smooth and 

 shining. There is a small oblong fovea on the metapleurae 

 behind, a line on the pronotum, tegulse, tubercles, a large mark 

 below them, a mark on either side of the scutellum, a line 

 on its hinder edge at the sides behind, and a narrower line in 

 the same place on the metanotum, pale yellow. Abdomen 

 shining, smooth ; a small mark on the side of the first 

 segment, a large one on the second, none on the third, a 

 large broad one on the fourth, and a smaller one on the 

 fifth, pale pellow ; pygidium reddish at the apex, densely 

 covered with soft pale pubescence and punctured. Length 

 7 mm. 



