110 
growth is variable. The larval life extends in some cases certainly over 
a period of three months. When full grown the larve attain a length, 
extended, of 8 millimetres; contracted, when disturbed or at rest, of 5 
| to 6 millimetres. Whenever disturbed 
they contract considerably, and become 
rigid and motionless. The larva is 
shown in characteristic positions in the 
accompanying illustration (Fig. 6, a, b). 
It is dull grayish in color, varying con- 
siderably in different specimens. On 
reaching full growth, the larva con- 
structs a cocoon of loose white silk, 
forming an irregular open network, as 
shown in Fig. 7, b. The cocoon is usu- 
ally placed in a fold of the leaf or is 
otherwise protected by the plant, and is 
occasionally partly covered with bits of 
anthers or fragments of leaves. In 
shape it is irregularly ovoid and is about 
6 by 3.5 millimetres. The change to 
: pupa takes place about three days after 
e="(2 Carploxera pielearia: a, larva; 6, co the cocoon 1s completed, and- te moun 
coon; ¢, moth; d, egg—all enlarged (origi- 
nal). usually appears 18 to 20 days after pu- 
pation. The pupa is 5 millimetres in length, somewhat robust, and is 
slightly yellowish in color, with sutures and tip brownish, the latter be- 
ing quite dark. A peculiar pad or flap-like pro- 
jection occurs on the side of the fifth abdominal 
joint (Fig. 6, e, g). The cremaster is produced, § 
notched at the tip, and armed with six long | 
hooked hairs or spines (Fig. 6, /). The adult 
insect is about 5 millimetres long, and expands 
from 12 to 14 millimetres. The general color 
is grayish yellow, inclining to saffron, the pri- 
maries being somewhat darker. The wingsare 
marked (Fig. 7) with transverse bands of dusky 
shade and each wing has a discal spot. The  \-4/ re 
(i 
head 1s dark brown, with the atenne, including yy¢. g. Zetia emula: a, larva en- 
a large spot on the vertex, yellowish. The _ larged; 6, joints of same, lateral 
Siasp VIER he dee mal qe layde view; ¢, do, dorsal view; d, tip 
under surface is nearly concolorous, the dark  6¢yoay—stitt more enlarged; ¢, 
bands being less distinct and the discal spots adult (original). 
more intensified. The fringes are concolorous with the ground-color 
and with black dots beyond the veins. 
_This insect has become a source of positive alarm in the Department 
herbarium, on account of its rapid increase and the harm it occasions. 
It behooves botanists to be on the lookout for it and to adopt such 
measures as will insure immunity from it if dry specimens are being 
received from Mexico and the Southwest, or from herbaria in which it 
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