1863.] 
71 
each segment above with a more or less broad yellow transverse band, 
almost confluent with the posterior margin; the anterior margin of the 
yellow band on first segment is angulated on each side, widens outward¬ 
ly, narrow on the disk and slightly indented in the middle; the yellow 
bands of the second, third and fourth segments are deeply and some¬ 
what squarely indented on each side with black, and slightly so on the 
disk, the yellow band on the second segment is divided into three parts 
by the indentation on each side becoming confluent with the black of 
the posterior margin; on the fifth and sixth segments the yellow band 
is broad, covering two-thirds of the segment, very slightly indented on 
the middle of the anterior margin; apical segment narrowly margined 
with black on the sides and tip, anterior part more broadly margined 
with black and produced posteriorly into a triangle, truncate at its 
apex with its sides somewhat rounded; the small tubercles on the disk 
are blackish. Abdomen beneath black, a spot on each side of the sec¬ 
ond and third segments, and a broad transverse band on each of the 
fourth, flfth and sixth segments, yellow. 
Female. Length 8 lines; expanse of wings'ldi lines. 
In structure, it differs from the male as follows:—General form more 
short and stout. Eyes smaller and wider apart; a transverse carina 
between the antennae; clypeus transversely rugose anteriorly, deeply 
and triangularly indented at the apex; antennae short, not much longer 
than the head, rounded, first joint short and thick, second very small, 
third about as long as the three following joints together, fourth, fifth, 
sixth and seventh joints about equal in length, but gradually broader 
towards the apex, the five apical joints formed into an elongate-oval 
knob, as long as the four preceding joints together. Prothorax with 
the sides wider and somewhat flattened. Mesothorax more flat, with a 
distinct longitudinal dorsal carina, and another, rather indistinct, on 
each side of the disk between the wdngs. Metathorax with the poste¬ 
rior angles not so strongly produced. Legs shorter and simple, ante¬ 
rior tarsi not ciliated beneath. Abdomen with six segments, shorter, 
scarcely curved under and very slightly attenuated posteriorly; upper 
surface more distinctly punctured, semi-opaque and scarcely sulcate; 
apical segment broadly rounded at tip, without carinae or tubercles on 
the disk; abdomen beneath slightly convex, without projections on the 
2nd and 3rd segments, apical segment long and broadly rounded at tip. 
