168 
IOWA ACADEMY OF SCIENCES. 
life, the white parts predominate, the brown partsappearing as 
distinct transverse bands, the last four of which are arranged 
in pairs, while the first is separate. 
The male differs from the female in that the brown spots are 
usually somewhat darker and the brownish tinge of the legs is 
more distinct. The lower genital plate is brownish at base, 
while the tip and upper margins are whitish. The claspers 
dark-colored, furnished with numerous hairs, somewhat 
enlarged toward the tip but narrowing acutely and the 
points slightly overreaching. They are equal in height to the 
dorsal plate, which is dark- colored. The horizontal, back- 
war dly projecting portions of the dorsal plate are light- colored, 
hairy, and not reaching beyond the forceps as in A. polygoni. 
The pupa is smaller than in A. %)olygoni, and can be easily 
distinguished by being much more elongated, the wing-pads 
narrower and their anterior angles more acute. The abdomen 
is comparatively more elongated and does not give so much the 
appearance of being drawn cephalad. The color-markings are 
virtually the same as in A. polygoni and are as follows: 
On the head, between the eyes, two brown spots separated 
by the whitish longitudinal band which extends to the fifth 
abdominal segment. Their inner and posterior borders are 
nearly straight, but the anterior and lateral ones roundish. 
Just back of these there are usually two small brown spots 
indicated. On each division of the thorax there are two squar- 
ish brown spots, and just back of each of these two smaller ones 
indicated. On each of the first four abdominal segments there 
is a short, transverse brown band on either side of the longi- 
tudinal line. Just back of those on the first segment two small 
ones are indicated. On the fifth the transverse brown band 
extends the entire breadth. 
The last three segments are distinctly indicated, but not 
especially marked, being uniformly dark colored. The wing- 
pads are of a light brown color. The legs are light colored, 
the tarsae more distinctly tinged with brownish. The antennae 
are mainly light colored, a little darker at tip. > Ventrally the 
general color of the pupa is more whitish, thus giving the legs 
a darker appearance than when compared with the darker dor- 
sal surface. The clypeus is yellowish, the suture between it 
and the head indicated by a fine dark line. The prosternal 
lobes which receive the first joint of the rostrum are indicated 
by two very fine black lines. The second joint of the beak is 
