384 P- Cameron. 



becoming gradually narrowed towards the apex and with 

 irregulär edges), the mandibles except th? teeth and lower 

 edge ; the inner orbits broadly, the Une curving round and 

 almost uniting behind the eyes, a broad line on the outer 

 orbits, the line not touching the top of the eyes, a broad 

 line on the centre of the base of the pronotum, a narrower 

 interrupted one on the apex, 2 lines on the centre of the 

 apex, slightly widened at the base, a slightly narrower line 

 along the tegulae, a large mark on the sides of the 

 scutellum, rounded on the outer side, oblique on the inner 

 and widened towards the apex, a squarish oblique mark 

 at their base, the post-scutellum, except for a conical mark 

 in the centre of the apical half, 2 lines on the metanotum 

 bordering the central furrow, the base of the propleurae 

 from near the top, the line on the top obliquely dilated 

 backwards to the middle, this part being narrower than 

 the rest, a broad, curved irregulär band on the apex of 

 the mesopleurae, a large, irregulär, somewhat triangulär spot 

 below the hind wings, a broad oblique mark in the centre 

 of the metapleurae, the line rounded and straight above, 

 more irregulär below, 2 large marks on the middle of the 

 mesosternum, a short curved line, dilated on the basai 

 half, on the sides of the post-petiole, curved lines on the 

 sides of the 2 nd to 5 th segments, a large, broad mark, 

 longer than broad, its 4 angles dilated outwardly, on the 

 basai two-thirds of the 2 nd ventral segment, a broad trans- 

 verse line on its apex, 2 broad transverse marks on the 3 rd , 

 the sides at the apex dilated outwardly, 2 united marks 

 on the 4 th and 5 th , also dilated laterally at the apex, and 

 2 lines along the sides of the 6* h , pale yellow. Legs 

 black, the fore coxae, the 4 posterior on the outer side 

 and in the centre in front and behind and a broad line 

 on the underside of the femora, pale yellow. Wings 

 hyaline, the apex of the costal cellule and the greater part 

 of the radial, smoky ; the costa stigma and nervures 

 black. — Length to end of 2 nd segment 12 mm. 



Rio Purus, Amazons (Prof. J. W. H. Trail. P. R. S.) 



Abdominal pétiole long, its apical half abruptedly 

 dilated ; it is nearly as long as the 2 nd segment and the 

 half of the 3 rd united ; the 2 nd segment is bell-shaped, 

 widened and clearly separated at the base from the ]st; 

 its length is shorter than the width at the apex. There 

 is a short, but distinct malar space. Ocelli * . * ; the 

 hinder are separated from the eyes by more than double 

 the distance they are from each other. 



