292 
THE STUDY OF INSECTS . 
long cross-vein (Fig. 349, c. v.) t so that the two appear to 
separate before the end of the discal cell. In the males the 
tip of the frenulum is knobbed. 
The larvae are naked, and live upon the leaves of shrubs 
and trees. They often con- 
ceal themselves in a case, made 
by loosely fastening together 
leaves, or by folding a single 
leaf. 
There are in our fauna rep¬ 
resentatives of only four or 
five genera belonging to this 
family; and the species that 
are common hardly exceed 
this number. 
One of the more common 
species is Thyatira scripta 
(Thy-a-ti'ra scrip'ta). This 
Fig. 349.—Win^sof Thyatira scripta. has faWn-COlorcd front WlUgS, 
conspicuously marked with light bands and zigzag lines 
(Fig. 348). According to Thaxter, it lays its eggs late in 
July, in chains of five or six, on the leaves of raspberry, upon 
which the larvae feed. The mature larva is rich yellow- 
brown, often almost black, with a distinct dorsal black line. 
The lateral portions are more yellow with blackish mottlings. 
When at rest the larva either elevates the cephalic and caudal 
ends of the body, like the Notodontids, so that the head 
rests upon the caudal segments, or conceals itself in a case 
formed by curling down the edge of a leaf. It makes a very 
slight cocoon late in August. 
Another common species is Pseudothyatira cyniatopho - 
roides (Pseu-do-thy-a-ti'ra cym-a-toph-o-roi'des). This spe¬ 
cies is slightly larger than the preceding one, expanding 
nearly two inches. The front wings are silky gray tinted 
with rose. They are marked with a black spot at the base, 
a double or triple line, forming a black band at the end of 
