ee 
The Hymenoptera of the Georgetown Museum. 209 
Polybia nana sp. n. 
Fulvous yellow, the occiput except narrowly round the edges and a spot in 
the centre near the top, a spot covering the ocelli, united to the black on the 
vertex by a short narrow line, roundly incised to the front ocellus below and 
continued as a line from the outer edges to join a curved line above the 
antenn, the outer edges being curved uown to each antenna, 3 broad lines 
on the mesonotum, the central the broader and roundly dilated at the base, a 
semi-circular mark on the apex of the post-scutelum, joined to a line which 
goes round the apex and down the central furrow of the meianotum, the 
lower half of the mesopleure behind the furrow, continued broadly, irregularly 
and roundly below on the lower third and continued on <o the outer part of the 
mesosternum, aline on the apex above round the spex of the furrow, its 
suture, a spot on the apex of metapleure above, 2 large regular, somewhat 
triangular one on the outer basal half of the metanotum, more on the latter 
than on the metapleure, the Ist abdominal segment to near the 
apex, the 2nd except for 2 large semi-circular mark commencing 
near the base and extending to near the middle and reaching 
close to the apex of the segment and the basal half of the 8rd; 
the 2nd ventral segment is reddish brown, with 2 oval yellowish marks 
on bssal half, yellow and a line on the vertex, the lest witha blackish 
line at its base. Antenne rufous, blackish above to the 8th end Yvh jonts. 
Wings hyaline, the nervures black; the 1st and 2nd ebueisse of the radius 
united aselong as the 3rd; the 2nd about one-third of the length of the Ist. 
Apex of post-scutellum gradually narrowed to a point, from which a fine keel 
runs down to the apex of the metanotum. Almost the basal third of the ab- 
dominal petiole is narrowed and is of equal width ; from it the apex becomes 
eradually widened to the apex ; the 2nd segment 3s bell-shaped, slightly longer 
than it is wide at the apex. Female. Length 5mm. 
Clypeus slightly longer than wide, its apex narrowed to 2 broad, rounded 
point, in its centre are 2 rounded curved lines almost united above. Ocelli in 
a triangle, the hinder separated from the eyes by about one and a quarter 
the distance they are from each other. Post-scutellum gradually elongated 
to a point, the apex of which is smooth and shining. Scutellum with a fine, 
shallow furrow down the middle. Mesonotum distinctly longer than wide. 
Belongs to the group of P. sedula. It may be known from that species and 
P. acutiscutis, Cam. by the 2nd abdominal segment having a semi-circular 
mark, not a broad transverse band, by the different colouration of the head, 
while P. acudiscuéis is further distinguished by the scutellum being black with 
2 yellow spots at the base. 
Polybia holoxantha, Ducke. 
A small, pallid species with yellow lines and markings and having the apex 
of post-scutellum narrowed and prolonged to a point. 
B. Apex of port-scutellum broadly rounded. 
Polybia pedunculata, Sauss. 
Vespides i, 205, Pl. XXVI, f.7 ; Ducke, Bolet,do Musen Goeldi, 1, 341, 
