132 HYMENOPTERA. 



the ^^ings hyaline, witli a ferruginous tinge on the anterior 

 margin of the superior pair ; a dark fuscous cloud occupying the 

 maigiual cell and extending to the apex of the wing; the ner- 

 vures ferruginous, becoming fuscous towaids the apex of the 

 wmgs. Abdomen : the petiolated basal segment rather darker 

 than the foUoAving segments, its apical margin with a narrow 

 yellow border; the following segments have a narrow pale fascia 

 on theii' apical margins, beneath, but on the upper surface the 

 fasciae are scarcely distinguishable. 



Hab. Brazil "( Villa Nova). (Coll. H. W. Bates.) 



56. POLYBIA DILIGENS. B.M. 



Female. Length 6 mill. — Black, decorated with yellowish- 

 white markings : the clypeus, sides of the face, two united 

 spots above the insertion of the antennae, and a narrow line at 

 the outer orbits of the eyes, yellow ; the clypeus with a black 

 stripe down the middle, not extending to the apical margin; the 

 mandibles, scape, and flagellum beneath, fulvous. Thorax : a 

 narrow line on the anterior and posterior margins of the pro- 

 thorax, three oblique spots beneath the wings, the anterior and 

 intermediate coxae in front, the tegulas, two longitudinal stripes 

 on the mesothorax, the scutellum, post-scutellum, and a large 

 spot on each side of the metathorax, yellowish-white ; a fascia of 

 the same colour on the apical margin of the petiolated segment 

 of the abdomen, another on the apical and basal margin of the 

 second segment, and a fascia on the apical margin of the third 

 segment ; the legs fusco-ferruginous, with the tarsi palest. 



Hab. Brazil (Santarem). (Coll. H. W. Bates.) 



57. PoLYBIA FLAVIFRONS. B.M. 



Female. Length 9 mill. — Black : the face and vertex orange- 

 yellow, with a line at the outer orbit of the eyes and a spot on 

 the mandibles at their base of the same colour ; the scape in front 

 and the flagellum beneath, fulvous ; a large cordate black spot 

 on the vertex enclosing the stcmmata. Thorax : a narrow line 

 on the posterior margin of the prothorax, an oblique spot beneath 

 the wings, the tegulae and a narrow epaulet passing over them to 

 the scutellum, a transverse spot before the latter emitting two 

 narrow hues which terminate before the anterior margin of the 

 mesothorax, the scutellum, post-scutellum, and a spot on each 

 side of the metathorax, yellow ; the anterior coxae yellow in 

 front ; the legs fusco-ferruginous, palest in front ; the wings 

 subhyaline, with a narrow fuscous cloud along the anterior 

 margin of the superior pair. Abdomen : the apical margins of 



