1863.] 
243 
the front black. Vesicle of the vertex loftily cariniform. transverse, a little 
emarginate in the middle and suddenly rounded off at each end. First joint of 
antenniB annulate with whitish at tip. Upper surface of front with a narrow 
basal fascia, varying in color from dark broMm to very pale reddish brown and 
with its central J extending forwards in a very obtuse angle. Labium w'hitish, 
the central lobe and the basal half of the lateral lobe generally obfuscated : 
back of the'head blackish, with a lateral row of three yellow confluent spots 
immediately behind the eyes. Frothorax black above, with its anterior and 
posterior lobes, two confluent spots before the posterior lobe and a large lateral 
spot, all yellow. Dorsum of thorax with the dorsal earina yellow only from its 
posterior bifurcation half-way to its tip, elsewhere black. Stripes of the dorsum 
dull black; the median stripes confluent, not attaining the anterior margin by 
I a millimetre, but attaining the antealar sinus, very slightly wider in front 
and excurved at the extreme tip. The antehumeral broader than the median, 
attaining the anterior margin but tapering behind and not qiiite attaining the 
antealar sinus. The humeral in front as w'ide as the median, and behind 
wider, where it is often confluent with the antehumeral, the intervening yellow 
stripe being throughout very narrow. Antealar sinus black, the posterior mid¬ 
dle and the angle next the front wing yellow. Pleura of the thorax with two 
unabbreviated blackish stripes, one on the suture behind the spiracle and one 
half-way between that and the humeral suture, the intervening space dull, 
pale-purple (lilac) in the living insect and livid in the dried specimen, and the 
two blackish stripes shading off gradually into the livid color. Spiracle black. 
Sternum pale-greenish-gray. Abdomen black, expanded % 9 on joints 7—9 as 
in fraternus % ^, and marked with yellow on the dorsum as follows :—1, with a 
large quadrangular spot confluent with a small spot or dot in front, both together 
covering its entire length ,• 2, with the usual trilobate vitta ; 3—7 with the usual 
trilobate narrow vitta tapering to a sharp point at tip and not quite attaining 
the tijD of each joint; 8 with a shortish triangular basal spot; 9 Avith a vitta, 
scarcely abbreviated at tip, sometimes broad, sometimes narrow, and varying 
much in shape ; 10 Avith a dorsal median rhomboidal spot or dot. Laterally, 
joints I, 2, 9 and 10 are yellow, 10 A^'ery narrowly so; 3—6 are obscurely 
clouded, Avith a less obscure basal triangle, the color of both cloud and spot in 
the living insect being a dull pale purple, and in the dried specimen a dull 
gray ; 7 Avith a basal triangle of the same color as 3—6 and a median yelloAV 
vitta; 8 with a basal yellow spot, reaching about half-way to the tip and 
alAvays attaining the margin throughout, and also with a submarginal terminal 
yelloAV dot, Earlets yellow, tipped behind Avith minute black teeth. Venter 
blackish, generally yelloAvish at tip and sometimes at base. The abdominal 
appendages are black and hairy; viewed from above the superiors are more 
than i as long again as the 10th abdominal, Avide apart at base, slightly divari¬ 
cate, tapering rapidly and chiefly on the inner side for J their length, then very 
sloAvly for the next when they again taper very rapidly and chiefly on the 
inner side and terminate in a slender thorn. Viewed laterally, their upper 
edge is perfectly straight, except that it curA-es very slightly downwards at 
their extreme base and very slightly upAvards at their extreme tip; their lower 
edge conA^erges Avith the other edge at an angle of 45° for J the length of the 
