162 
with a single bristle. The first 6 dorsal abdominal segments are very sharply 
defined and bear on each side of the middle a transverse group of 3 tubercles with 
bristles; outside of these is a single one. 
The spiracles are plainly seen at the latero- nme angle of each segment. The 
pygidial segment is curved downward and at its middle there is a transverse line 
of 8 tubercles with bristles, slightly separated on the median line. The apical 
part of this segment has a median, transversely corrugated carina. On the 
extremity of the last ventral segment, on each side; there is a concentrically 
corrugated tubercle, from which 2 yellowish ochraceous bristles arise. 
Each femur, on the outer part of its apex, has a single tuberculated spine, 
darker than the surface. The pupw# are very active when taken from their 
cocoons, wriggling continuously if held in the hand. 
A peculiar large, button-shaped spiracle may be seen on each side just behind 
and a little below the prothoracie shield. 
Adult.—This insect is graceful in form and very delicate in color. A black and 
white drawing, such as fig. 4 on Plate XI, of course can not show its coloring, 
which is one of its most striking features. The profile is shown by Plate XI, 
fig. ( 
The length is 17 millimeters from the tip of the snout to the tip of the abdomen, 
and the diameter about 4.75 millimeters. Seen from above, it measures 13 milli- 
meters in length. Its color is a combination of ocher, reddish-ocher, and dark- 
brown, or black, in which reddish-ocher predominates. 
The head, exclusive of the snout, it globular, and smooth above and below, 
with a few seattering shallow punctures at the side. Its color is reddish-ocher. 
The eyes are jet-black and broadly crescent-shaped, nearly uniting at the upper 
and under sides of the head; their exterior outline, when viewed directly from 
in front, is almost a perfect circle. The rostrum is cylindrical and strongly 
curved downward, the basal third being twice the diameter of the rest and 
covered with circular light-gray spots, from each of which arises a tiny, dark- 
brown tubereular spine. The apical two-thirds is smooth and finely punctured 
longitudinally. The tip is slightly swollen laterally and of a darker color, as 
are the mouth parts. The mandibles are black and glossy, and tridentate, the 
teeth of one fitting into the interstices of the other, The narrow transverse 
labrum, with the anterior margin rounded, is scarcely visible. The antenn:e, 
apparently composed of 8 joints, of which the first is equal in length to the 
others combined, are placed in short deep furrows on each side of the snout 
little less than one-fourth the distance from its base. The upper edge of this 
furrow projects at its middle and somewhat overlaps the articulation of the 
first antennal joint. The last joint is greatly swollen, being twice the diameter 
of the preceding one, and is securiform. The length of the antenne is equal 
to that of the rostrum. The third joint is chalice-shaped and one-half longer 
than the second one, which is inserted on the inner apical portion of the first. 
The prothorax is subconical, three-fourths as wide as the elytra, per fectly truncate 
at its anterior margin, and slightly rounded posteriorly. A narrow collar extends 
around its entire anterior margin, the sides of’ which are subparallel. The sides 
of the thorax are rounded, and their surface is smooth, dull, and sparsely 
punctured, the punctures toward the sides bearing small tubercles or spams 
These punctures are also found on the underpart of the pro- and mesothora 
the metathorax, the ventral surface of the abdomen, the pygidium, the oe 
and the tibia of all the legs. 
Thoracic markings occur as follows: A lancet-shaped, light-ochraceous or buff 
median mark, extending from a point behind the anterior margin one-fifth the 
length of the thorax, to the posterior margin; on each side of this a wide black 
line, broadening perceptibly at the posterior margin, meeting in front of the 
