Neotropical Vespidae. 385 



Belongs to Saussure's Division Jota and has the 

 gênerai colouration of P. liliacea ; it has a longer abdominal 

 pétiole than that species and the post-petiole is more 

 abruptly and clearly separated ; the 2 lines on the meso- 

 notum are not united at the apex, the head is largely 

 marked with yellow, and the abdominal segments are 

 not lined with yellow above. 



5. Polybia acutiscutis sp. nov. £ or Ç. 



Yellow, with the following parts black: the occiput, 

 outer half of the eye orbits, a large trans verse oval mark 

 on the vertex, united to the black on the occiput by 

 a short, narrow line, widest in front, a broad line above 

 each antennae, narrowed above and united to the mark 

 on the vertex, a large mark between and above the 

 antennae, it also extending shortly below them, where it 

 is rounded, above it is gradually narrowed to a point, 

 two irregulär curved lines in the centre of the upper part 

 of the clypeus, 3 broad lines on the mesonotum, the 

 central dilated at the base on both sides, the lateral dilated 

 on the outerside at the base, the. scutellum, except for a 

 transverse triangulär mark (the narrowed end on the 

 innerside) on eitherside at the base, the sides and apex 

 of the post-scutellum, the parts bordering both, a line 

 down the centre of the median segment, the pronotum 

 except at the apex, the base of propleurae, a large 

 somewhat triangulär mark — dilated at the base above, 

 the narrowed part below on the apex ; the mesopleurae, 

 except for an oblique broad line, extending from the 

 tegulae to the middle and the lower two-thirds of the 

 apex, the mesosternum, a line, dilated in the middle above, 

 on the upper two-thirds of the metapleurae extending on to 

 the metanotum, the lower edge broadly, a large mark on 

 the basai three fourths of the i st abdominal segment, its 

 base with two somewhat oval marks and its apex 

 indented by a square yellow mark in the middle, a 

 narrow irregulär line on the base of the 2 nd segment, a 

 broad band on its middle, the apex of the mark regulär, 

 transverse, the base irregulär, incised in the middle and 

 at the sides ; the 3 rd to 5 th broadly at base, the 6* h entirely, 

 the ventral two segments almost entirely and the others 

 irregularly and narrowly. Legs black, the anterior coxae, 

 apex of femora, tibiae and tarsi, a line on the outerside 

 of the middle coxae and on the lower side of the middle 

 tibiae, yellow. Wings hyaline, the stigma and nervures 



