* 

 382 P- Cameron. 



and the nervures, except on the hyaline or yellow parts, 

 are black. — Length to end of l s * abdominal segment 

 6 mm. 



Rio Jutahi. Amazonia, January (Prof. J. W. M. Trail 

 F. /?. S.). Occiput sharply margined ; the vertex slightly, 

 broadly roundly incisecî. Eyes densely covered with 

 blackish pubescence. Malar space as long as the pedicle 

 of the antennae. Ocelli in a triangle ; the hinder are 

 separated from each otlier by about one fifth the distance 

 they are from the eyes — by about the length of the 2 nd 

 joint of the flagellum of antennae. Mandibles dark brown. 

 There is a longitudinal furrow between the antennae. The 

 mesonotum is black, except narrowly on the sides, the 

 yellow border being broader in front and projecting back- 

 wards on the innerside, the black central part being longer 

 than broad and of almost equal width throughout. Apex 

 of clypeus broadly rounded. Second joint of flagellum 

 nearly as long as the following two united. Metanotum 

 broadly, but not deeply depressed inthemiddle; it bears 

 large, deep, clearly separated punctures ; the sides are 

 broadly rounded. The l st abdominal segment large; it 

 becomes gradually wider towards the apex, where it is 

 not quite so wide as the segment is long. The abdomen 

 is slightly longer than the head and thorax united. The 

 2 nd abscissa of the radius is half the length of the 3 rd . 



Belongs to Ducke's groupe of fraternus (1. c. p. 323); 

 the abdominal pétiole is longer than usual, cupuliform, 

 clearly separated from the 2 nd segment ; the large basai 

 abdominal segment and longish abdomen gives it the 

 appearance of a Polybia. The post-petiole is larger than 

 usual, broad, roundly convex, roundly narrowed behind 

 and with an oblique slope there. The median segment 

 is larger than usual ; its apical slope is not so steep as 

 it is with most species. The abdomen, too, is longer 

 compared with the length of the head and thorax. 



3. Polybia panamaensis sp. nov. 9. 



Black ; the flagellum of antennae rufo-testaceous, 

 darker at the base above, the anterior tibiae and tarsi 

 fuscous; wings hyaline, tinged with fuscous, the stigma, 

 costa and nervures rufo-testaceous. — Length (total) 17 mm. 



Panama (G. F. Mathew). 



Head wider than the thorax; the temples not quite 

 so long as the top of the eyes ; broadly rounded. Malar 



