92 TRUE TUSSOCK-MOTHS. 
no danger that she can reach a tree some distance away. 
Spraying with arsenical poisons will also kill these voraci- 
ous caterpillars. 
THE PARALLEL-LINED TUSSOCK-MOTH. 
(Parorgyia parallela G. & R.). 
Another caterpillar, also ornamented with long pencils 
of hairs, feeds upon the plum, crab-apple, oak and other 
trees. It is sometimes quitecommon. It hasa gray body, 
with a dorsal and stigmata] black line. The black pencils 
or tussocks are found on top of segments 4, 5, 6 and 7, the 
latter one is sometimes wanting; on each side ofthe first and 
last segment is a pencil of long black hairs; on top of seg- 
ment 11 is also an apparently double brush of black hairs. 
The hair on the sides of the body is yellowish, in spreading 
clusters; on top of segments 9 and 10 is a small pale yellow 
cup. The head is of a shining-black. When full grown this 
caterpillar measures an inch and a half. It nowsearches for 
a protecting shelter, and here spins a coarse cocoon, inside 
of which it changes to a pupa. In Parorgyia bothsexes are 
winged. The moths are dark gray, with darker colored 
wavy lines and spots; there is a dark blotch between the 
outer line and the apex. They resemble the males of 
leucostigma, but are a little darker and larger, as shown in 
Fig. 88, Plate X XI. 
THE GYPSY-MOTH. 
(Ocneria dispar Linn.). 
This is also related to the Liparide. It is a European 
moth, which was imported into Massachusetts in 1868, 
and which has already caused enormous damage to that 
state, requiring annual appropriations of many thousands 
