650 PARASITIC HYMENOPTERA, ii., 



red. Abdomen smooth. Apex of pronotum narrowly fiery- 

 red. There is a wide curved furrow on the malar space. Ven- 

 tral surface of abdomen largely violaceous. 



I am not sure bvit that the deep rufous tint of the legs may 

 be caused by discolouration through the action of cyanide of 

 potassium. 



Xantheurytoma, gen. nov. 



Submarginal nervure twice the length of marginal, 

 thickened towards the apex, marginal thickened, postmargi- 

 nal not one-half the length of marginal, not longer than 

 stigmal, which is triangularly thickened at the base, at its 

 junction with the marginal, the lower part of it narrowed, 

 roundly curved. Antennae short, thick, joints of flagellum wider 

 than thick. Ocelli almost in a straight line, the central very 

 little in front of the lateral. Parapsidal furrows clearly defined, 

 rounded, meeting very shortly before the base of scutellum. 

 Scutelluni large, longish-pyriform, the broad end at the apex; 

 almost as long as the mesonotum. Metanotum short, steeply 

 oblique ; the centre with a keel on cither side, the two paral- 

 lel not converging. Thorax not punctured, only very finely 

 striated above. Abdomen sessile, distinctly shorter than 

 thorax ; its second segment much longer than the others ; its 

 apex bluntly rounded, broad : fifth segment shorter than 

 fourth. 



There is no clear club to the antennae ; the joints of the 

 flagellum are not distinctly separated, at the most only pilose ; 

 the scape is narrower than the tlagellum ; it does not extengl 

 much above the middle of the eyes ; there are eleven joints ; 

 the front is not much depressed. 



Combes near to Xnnthorom<(, Ashni., which may be known 

 from it by the fifth, abdominal segment in the $ being 

 nearly twice as long as the fourth, by the abdomen being 

 longer than the thorax, and by the marginal nervure being 

 once and one-half longer than the stigmal, not twice longer. 

 The parapsidal furrows are deeper, more clearly defined and 



