151 



First abdominal segment nearly as long as the scutelluni and nietano- 

 tum uttited, slender, gradually widened towards the apex, where it is 

 fully twice the width of the base; distinctly longer than the second 

 which is clearly longer than the width at the apex; its base narrowed 

 into a neck. Postscutellum flat, oblique^ly sloped, broadly rounded 

 behind, transverse at the apex, its sides bounded by a deep, curved, 

 oblique furrow. Sides of median segment broadly rounded. Base of 

 thorax broadly rounded; the sides of the metapleurae roundly dilated 

 at the base below. Ocelli forming almost an equilateral triangle, the 

 hinder separated from the eyes by a greater distance than they are from 

 each other. Malar space minute. Third joint of antennae as long as 

 the following two united. Clypeus between tbe eyes not quite as great 

 as the length; the apex roundly narrowed, not very sharply pointed in 

 the middle. Third abscissa of radius twice the length of second whicJi 

 is nearly as long as the space bounded by the recurrent nervures, the 

 cellule being clearly wider in front than it is in P. fasciat^ Lep.; the 

 recurrent nervures are separated from each other by about the same 

 distance as they are from the transverse cubitals. 



Belongs to the group of P. fusciata and fastjdiosuscula. SauBS, but 

 more related to the latter than to the former. The latter has black 

 antennae and only a small mark on the vertex, not a large bifurcated 

 one. P.- fasciata has the first abdominal segment shorter and more 

 distinctly dilated at the apex, where it is moich wider; a conspicuous 

 distinction lies in the fact that in the species here described the base 

 of the second abdominal segment is broadly black, in fasciata broadly 

 yellow. Very proba.bly, as in all the group, the size and numl)er of the 

 hlack markings vary. 



4457 Polybla rejecta Fab. race belizensis Cam. 



Black: a narrow pale band on the base of the postscutellum, along the 

 apex of the pronotum and on the apex of the first abdominal segment; 

 a narrow darker colored band on the apices of the other abdominal seg- 

 ments; wings rufo-fulvous on the costal and basal cellules, the radial 

 and the apical cubital cellules smoky, the rest hyaline; the nervures and 

 stigma black. Female. Length to end of second abdominal segment 9 mm. 



Covered with a grey sericeous pile. Abdominal petiole as long as the 

 scutellum and median segiment united, its apical half distinctly nodose; 

 the second abdominal segment distinctly eampanulate, its width at the 

 apex equal to the length. Ocelli in a triangle, the hinder separated 

 from each other by half the length they are from the eyes. Central 

 part of front raised, forming a triangle, the apex ending below the an- 

 tennae, there is a short fovea above the apex in the center. Clypeus 

 slightly longer than the width between the lower part of the eyes, 

 which converge distinctly below; the apex of the clypeus ends in a 

 sharp point. There is a short white mark on the base of the mandibles; 

 the apical tooth is dark rufous. Third joint of antennae nearly as long 



