27 
on the penultimate segment are longer and project backwards 
beyond the posterior margin of the segment. On the last seg¬ 
ment they appear as two slender black-tipped tubercles on the 
[ upper surface. Beneath the tubercles, and nearer the hind mar¬ 
gin of each segment, is a pubescent tubercle. The last segment 
is about two thirds as wide as the preceding one, semicircular, 
shining, colored like the head, bearing posteriorly a pair of 
stout hooks projected backwards and curved upwards, with a 
strong inner seta-bearing tooth near tip, not as long as the 
tip itself, which also bears setae. Legs rather short, four-jointed, 
with a single claw. Anal pro-leg short, cylindrical. 
Pupa .—(Plate IV., Fig. 4.) Length 5 mm., greatest width 
2.2 mm. Elongate-oval, tapering posteriorly, brownish testa¬ 
ceous; head, wing-pads, and legs usually paler. Surface subo¬ 
paque, minutely and densely punctate, and very minutely 
pubescent, with smooth spaces at bases of wing-pads and on 
metathorax. 
Vertex of head with a pair of large spines on each side. Just 
over each eye is a pair of minute spines, and in front of these 
another pair on each side. The labrum is rather strongly 
notched. 
Prothorax with four spines on the anterior margin, the inner 
largest of all; four spines on each side, one at each angle, and 
the remaining two nearer the angles than to each other. Within 
the line of marginal spines are three smaller ones on each side 
of the disk. The scutellum is three fourths as long as the meta¬ 
thorax, which is as long as the first three abdominal segments, 
and is longitudinally sulcate at middle. The elytra reach to 
the hind knees, and the hind tarsi reach the posterior margin 
of the fifth segment. The wings attain the middle of the sixth 
segment. 
Each abdominal segment bears on each side a long spine on 
its lateral edge, situated near the middle on the first seven, and 
at the posterior angles of the last two, pointed directly back¬ 
wards on the last segment. The spiracles are rather large, cir¬ 
cular, slightly elevated on broad tubercles, darker colored and 
conspicuous on the first five segments, indistinctly visible on 
the remainder. Just above these on each segment, is a strongly 
elevated carinate ridge, also bearing a spine, except on the last 
segment. The spines are small, except on the seventh and 
eighth segments, where the ridge becomes enlarged and over¬ 
hanging, and the spines large. The first four segments are 
short, nearly equal, about twelve times as wide as long; the 
fifth and sixth are each about twice as long as the second, the 
sixth a little the longest. The seventh segmenth is subtrigonal 
above, with curving sides; the eighth consequently arcuate and 
narrow, obtusely pointed behind at middle; the ninth a little 
