1863.] 
247 
from their tips to their base, when they diverge widely so as to leave a trian¬ 
gular green spot which almost attains the antealar sinus. Pleura with an ill- 
defined pale dusky stripe in the suture behind the spiracle, and a well-defined 
dusky one half-way from this suture to the humeral one, the intervening space 
livid. The entire space between this last stripe and the humeral one greenish 
yellow, yellowish above and below. Spiracle black. Sternum dull greenish gray 
behind. Antealar sinus black on its anterior origin of wings black; meta- and 
mesothoracic scutels vivid yellow. Abdomen black, with joints 7—9 moderately 
expanded as in fraternus, and 9 a trifle longer than 8. Joint 1 is entirely green 
except a hairy black stripe extending from the lateral tip of its dorsum nearly 
to the centre of the dorsum; 2 is laterally pale-green with some irregular yel¬ 
low freckles, with the usual trilobate dorsal vitta which is pale-green. Along 
the middle of this vitta, as well as the middle of joint 1, extends a longitudinal 
very irregular, vivid yellow line, alternately contracting and expanding and 
throwing off lateral fine yellow lines. The remaining joints are marked dorsally 
as follows with greenish yellow:—3 has the usual narrow, pointed, trilobate, 
vitta scarcely attaining the tip, and 4—7 a narrow poihted vitta reaching only 
^ of the way to the tip, with rudiments of a short basal vitta on 8. Later¬ 
ally 3—7 have an obscure yellow triangular basal spot, 8 and 9 are submargi- 
nally yellow except at base and tip; the terminal ^ of the margin of 8 and the 
whole of the margin of 9 are also yellow; and 10 has an obscure yellowish 
cloud along its lateral margin. Earlets green with very minute black teeth ; 
venter blackish. Abdominal appendages black and hairy, the superiors J longer 
than the 10th abdominal joint, wide apart at base and moderately divaricate, 
the inferiors 4 shorter than the superiors, still wider apart at base and still more 
widely divaricate than the superiors. Viewed laterally from above at an 
angle of 45° to the perpendicular, the superior appendage which is next the 
eye is regularly tapered, except that it is trumpet shaped and much expanded 
on its basal i especially on the inside, and has its extreme tip suddenly con¬ 
tracted on the outer side and terminating in a small acute thorn. The appen¬ 
dage furthest from the eye, from the same point of view, has its upper edge 
sinuate for | its length in two exceedingly gentle curves, the first twice as long 
as the second, when the appendage turns slightly upwards in the form of a 
straight, fusiform, robust, acute thorn occupying the other i of its length. From 
the same point of view, the lower edge of the same appendage for | its length 
diverges from the upper edge in a very gentle concave curve till it is twice as 
far from it as it was at base, when it turns suddenly upwards in a direction at 
right angles to the upper edge till it has travelled full i of the way to it, thereby 
forming an acutely angular tooth, and then runs in a very gentle curve, whose 
convexity is downwards, to the base of the terminal fusiform tooth. The infe¬ 
rior appendages are rounded below, flat above, but slightly tapering, and with 
their upper edge perfectly straight till they attain their utmost limit, when 
the extreme tip which is obtuse turns upwards in the form of a small robust 
thorn. Legs black, the anterior femora and trochanters with a “posterior” 
pale green vitta. Wings hyaline, slightly flavescent at base; veins black, the 
costal vein pale green in front as far as the pterostigma; pterostigma dark red- 
