454 PROCEEDINGS OF THE ACADEMY OF [1898. 



less than that between them and eyes ; the latter almost reaching 

 mandibles ; first joint of flagellum as long as the second, third and 

 most of fourth ; pronotum short, margined ; dorsulum more than 

 one-quarter longer than broad ; middle segment broadly channelled, 

 down middle almost concave ; petiole of abdomen about as long as 

 hind femur, elongate, tolerably slender, broadened gradually and 

 gently from beyond middle; remainder of abdomen ovate; wings 

 dark subhyaline, faintly yellowish in the costal cell ; nervures and 

 stigma brownish ; third submarginal higher than long, the outer 

 nervure curved, and just before its junction with the cubital nervure, 

 angulate. Length 15 mm. 



Chapada, February. Three examples. Belongs to Saussure's V, 

 Division Kappa, and is apparently allied to P. raphigastra. The 

 petiole is more broadened at apex than in P. surinamensis, and the 

 body quite robust. 

 Polybia gorytoides n. sp. 



9 or $ . — Blackish or dark brown ; head, except a broad trans- 

 verse stripe on vertex, thorax entirely on sides and beneath, pronotum 

 except an oblique stripe on each side, two stripes on dorsulum, 

 scutellum and postscutellum except posterior margins, middle seg- 

 ment except in longitudinal furrow, legs (tarsi darker), abdomen 

 entirely beneath, first dorsal segment at sides and apex, apical mar- 

 gin of dorsals 2-6, yellow, that on second dorsal extending to base 

 at sides. 



Clypeus broader than long, with a few large punctures, its fore 

 margin sharply angular ; ocelli forming a rather high triangle, the 

 space between hind pair less than that between them and anterior one, 

 and not equal to half the distance between them and eyes ; the latter 

 almost reaching base of mandibles ; vertex distinctly punctured ; 

 flagellum clavate, the first joint about as long as the two following 

 united ; pronotum indistinctly margined ; dorsulum punctured, but 

 not very strongly, about one-fifth longer than broad ; middle segment 

 broadly furrowed, rather flat, and sloping evenly from base to apex ; 

 first abdominal segment subcampanulate, much shorter than hind 

 femur, not much longer than first hind tarsal joint; remainder of 

 abdomen subpyriform, very broad at base, acute at apex ; wings sub- 

 hyaline, very faintly yellowish along costa ; nervures and stigma 

 yellowish ; third submarginal cell longer than high, twice as long, 

 or more, than second, a little narrowed above, the outer nervure 

 gently sinuated. Length 10J mm. 



