NEW GENERA AND SPECIES OF HYMENOPTERA. 109 



12th, and the remainder on the 13th. The larvse were very long 

 and slender, and must have rested in the egg coiled like a wire- 

 spring. I had no opportunity of making a description of them, 

 but noticed the very curious thick club-shaped hairs with which 

 many of the tubercles were furnished. Having no marsh-bedstraw 

 {Galium paliistre) at hand, I fed the larvae on knotgrass. This, 

 strange to say, they preferred quite fresh, in contrast to most 

 other Acidalia larvae, which seem to have a liking for rather dry 

 food. I suggest that one of the natural food-plants of this 

 species is the above mentioned Galium. None of this brood 

 were reared, as I believe it was kept in too dry a condition. 



Corney House, Chiswiek, Middlesex : March 5th, 1904. 



ON SOME NEW GENERA AND SPECIES OF 

 HYMENOPTERA. 



By p. Cameron. 



CHALCIDID^. 



OxYCORYHPUs, gen. nov. 



Antennfe longish, the scape long ; on the lower (almost) half it 

 becomes gradually dilated, the end of the dilated part abrupt, forming 

 a large sharply pointed tooth ; the apical part becomes gradually, but 

 not much, dilated; the pedicle longer than broad ; the third joint dis- 

 tinctly longer than the fourth. Malar space as long as the eyes. 

 Frontal depression narrow and widely distant from the ocelli. Temples 

 very narrow, almost obsolete on the outer side. Mandibles bidentate. 

 Scutellum large, as long as the mesonotum, narrowed towards the 

 apex, which is narrowed, slightly incised in the centre, and projecting 

 over the metanotum, which is irregularly reticulated, and has two 

 stout keels in the ceutre, forming a large area, extending from the 

 base to the apex. Abdomen short, the basal segment nearly as long 

 as the other segments united, sessile. Hind femora swollen, in- 

 distinctly toothed. Submarginal vein long and narrow ; the sub- 

 costal vein long and narrow ; the costa and radius short, thick, and 

 forming almost one vein. The prothorax is nearly as long as the 

 mesonotum ; the sides of the metapleurae near the apex project ; the 

 base of the middle femora is broadly and much narrowed, compared 

 with the apex, which has spurs. The antennae are eleven-jointed ; the 

 last joint is as long as the preceding. On the base of the hinder 

 femora, on the under side, is a broad rounded projection. The apical 

 two joints of the antennae are closejy imited ; the pedicle is bare, 

 narrowed. 



The peculiar structure of the antennal scape makes the male 

 of this genus easily recognized. Comes near to Stomatoceras, 

 Kir by. 



ENTOM. — APRIL, 1904. L 



