The Apple Leaf Skeletonizer. 
(Pempelia hammondi, Piley.) 
Order Lepidoptera. Family Pyralid^:. 
Fig. 3. Pempelia hammondi , Riley, a, larva, natural size; b, one of middle segments of larva, 
-magnified; c, head and first three segments, dorsal view; d, adult moth. 
[A brownish or greenish larva one half inch long, with scat¬ 
tered hairs, which spins a web on the upper surface of the leaf and 
eats the parenchyma, giving the foliage a scorched appearance.] 
This insect is one of the most destructive species with which 
the nurseryman has to contend, nearly rivaling in the extent and 
seriousness of its injuries that species which I think must head 
the list of leaf-eating nursery pests — the lesser apple leaf roller 
(Tercis minuta). It seems very generally distributed throughout 
Illinois, having been observed during the past season doing seri¬ 
ous injury to apple-trees, both in the orchard and nursery, in 
McLean, Champaign, and Marion counties. It was first reported 
from this State a quarter of a century ago, and does not as yet 
seem to have become destructively numerous either in the Eastern 
or far Western States. 
