116 QUINCE CULTURE. 
something over an inch long at maturity. The body is 
bright yellow, and the head coral red. Though not 
gregarious, they are often numerous enough to be very 
destructive to the foliage of the quince and other trees 
and shrubs. bere are two broods ina year. The first 
hatch about the middle of May, and the second late in 
July. The first brood complete their growth by the 
midd'e of July, spin their cocoons on the Jeaves or 
branches of trees, and enter into the chrysalis state. 
The chrysalis has little downy hairs, and three oval 
clusters of bran-like scales on the back. ‘They pupate 
eleven days, when the female comes forth wingless, and 
the male with wings that expand an inch and three- 
eighths. The wings are ashen gray, crossed by darker 
wavy bands on the upper pair, which are also marked bya 
black spot near the tip, and a very small white crescent by 
the outer angle. Their antenne are broadly pectinated. 
The body of the female is a very thick, oblong oval, in 
distinctly marked sections, and of a lighter gray than 
the male. She waits on the outside of her cocoon for 
the coming of the male, and after meeting him lays her 
eggs in an irregular inass on the top of the cocoon, which 
is spun between the leaves, and then covers them with a 
frothy looking substance, which hardens to brittleness, 
and is then impervious to water. After laying her eggs 
she drops to the ground and dies. The young larva, 
when seriously disturbed, let themselves down by silken 
threads ; and when the danger seems past they climb up 
the threads to regain their former situation. 
Remedies.—The leaves attached to the cocoon show 
where their eggs are laid, so they can easily be found 
during the winter, and destroyed. There are nine species 
of two and four winged flies that are known to he para- 
sites of this insect in the larval state. 
14. PEAR-TREE StuG (Selandria | Blennocampa] Ce- 
yasi, Peck).—This caterpillar is called a slug, from its 
