HYMENOPTERA. 389 



at the apex ; the anterior femora outside and the tibia; yi'Ilow ; 

 the intermediate femora at their apex beneath, the tibife at their 

 base and also the base of the posterior pair, )ellow ; the inter- 

 mediate and posterior tibitr; at their apex and also the tarsi fer- 

 ruginous; the wings subhyaline, the tegula; pale rufo-testaceous. 

 Abdomen : the four basal segments have a subovate yellow 

 macula on each side, the apex ferruginous. 



Hab. India. 



29. OXYBELUS MARGINATUS. B.M. 



Female. Length 3 lines. — Black : head and thorax closely 

 but not coarsely j)unctured ; thinly sprinkled with short yellow 

 pubescence ; the face and cheeks covered with silvery pubes- 

 cence ; the antennjE fulvous towards their apex beneath ; the 

 mandibles obscurely ferruginous in the middle. A narrow line 

 on the collar, the tubercles, a stripe on the anterior and interme- 

 diate femora beneath, and a line on the anterior tibiae outside, 

 yellow ; the scutellum and post-scutellum with a minute yellow 

 dot on each side ; the squama pale testaceous ; the raucro at 

 the base of the metathorax broad, grooved above, the sides 

 ])arallel and the apex deeply notched. Abdomen finely punc- 

 tured, the apical margins of the segments with a narrow pale 

 yellow fascia. 



The male closely resembles the female, but has the anterior 

 tarsi fulvous, the intermediate and posterior pair obscurely 

 so, and the posterior tibiae are yellow behind ; the thoracic 

 mucro is more produced and notched, as in the other sex. 



Hab. Brazil (Santarem and Villa Nova). (Coll. H. "VV. Bates.) 



30. OxYBELUS AURIFRONS. 



Female. Length 3 lines. — Black : the face and cheeks covered 

 with golden pubescence ; the flagellum ferruginous, more or less 

 fuscous towards the base above. The collar, tubercles, a spot on 

 each side of the scutellum, the anterior tibiae in front, and a spot 

 at the apex of the intermediate femora behind, black ; the claw- 

 joint of the tarsi pale rufo-testaceous, the pulvillus black ; the 

 scutellum and post-scutellum with a central longitudinal carina ; 

 the squama pale testaceous, the mucro dilated at the apex, hol- 

 lowed above, deeply emarginate at the tip. Abdomen shining, 

 finely punctured; the first and three following segments with 

 a narrow, waved, transverse yellow stripe, which is slightly 

 interrupted in the middle, and placed a little before their apical 

 margins. 



Hab. Brazil. (Coll. F. Smith.) 



