22Ô P. CAMERON. HYMENOPTERA. 



commencing, on the innerside, at the same place as the preceding one, but not reaching to 

 the outer edge and the last segment entirely, pale yellow with the usual pale markings on 

 the ventral segments. Front legs whitish yellow, their coxae black to near the apex, but 

 with the black broadly divided in the middle on the lower, outerside, the femora fuscous 

 above, the tarsi fuscous ; the middle coxae black, with a broad oblique mark on the outer 

 basai half, the trochanters white, the femora rufo-testaceous, black above, the tibiae white, 

 rufo-testaceous below, black below and at the apex ail round, the base narrowly rufo-testaceous, 

 the tarsi black ; the hind legs black, a large mark on the base of the coxae above, the apex 

 shallowly trilobate, not reaching to the middle, the basai joint of the trochanters, a band, 

 twice the length of the black basai part, on the basai half of the tibiae, the apical two-thirds 

 of the i st joint of the hind tarsi, the apex narrowly black, and joints 2 and 3, except at the 

 apex, white; the spurs fuscous. Wings hyaline, the nervures and stigma black, the apical 

 nervures paler in tint; the areolet minute, square, the radius and cubitus almost touching, 

 the récurrent nervure received at the apex. 



8. Mesostenoideus heterospila sp. n. 

 Bivak Island, January. 



Black, smooth and shining, the greater part of the head and thorax with a plumbeous 

 hue ; the metanotum from the keel to the top of the apical slope transversely striated, the 

 mesopleurae longitudinally striated, narrowly above at the base, the striae becoming gradually 

 wider below where they extend beyond the middle, the metapleurae more strongly striated, 

 the striae becoming wider below, where they reach the apex; the furrow bordering the apex 

 of the mesopleurae crenulated; the metanotal spines small. The palpi, a broad curved band 

 on the upper eye orbits, tegulae, scutellum, 2 large transverse marks on the metanotum, 

 between the keel and the apex, rounded on the inner side, narrowed on the lower side 

 below, an oblique mark, twice longer than wide, on the upper half of the apex of the meso- 

 pleurae, one of the same length, but wider, and slighter narrowed above, on the top of the 

 base of the metapleurae, a larger square one on the apex below, a broad band on the apex 

 of the post-petiole, roundly, broadly incised at the base, the apex with a triangular incision, 

 2 broad marks on the middle of the 2 n <i segment, roundly narrowed on the innerside, a 

 smaller one on the sides of the 3 rd , more narrowed inwardly, 2 larger, wider marks, narrowed 

 inwardly and extending almost to the centre, on the 4^, 2 similar, but narrower ones on the 

 7* and the apical, pale yellow. The fore legs white, tinged with fuscous, the tibiae black to 

 near the apex, the tarsi blackish; the middle pair white, the coxae black at the apex, more 

 broadly so above, the black becoming obliquely narrowed, the apical joint of the trochanters, 

 and the basai and apical of the tarsi black, the femora and the tibiae on the innerside tinged 

 with fuscous, the hind legs black, more than the apical half of the coxae, apical joint of 

 trochanters, apical half of basai joint of the tarsi and the 2 nd , 3 rd and 4 th , white. The && to 

 I3 lh joints of the antennae white. Wings hyaline, the nervures and stigma black; the trans- 

 verse médian nervure received distinctly behind the transverse basai. Q. 



Length 11 m. m.; terebra 4 m. m. 



