. Eastern forest insects. Forest insects. structs oval mines in the leaves of aspen. It is occasionally quite abundant in the Lake States and Maine. L. corylisella Chamb. mines the leaves of hazel in Maine. Marmara fasciella Chamb. is widely distributed, probably oc- curring throughout the range of its host, white pine. Eggs are laid on the bark of branches of the host. Young larvae bore through the bark and construct linear mines in the inner bark. Winter is spent as a larva in the mine; pupation occurs during late spring, and adults begin to appear in late May. Several other species of Marma
. Eastern forest insects. Forest insects. structs oval mines in the leaves of aspen. It is occasionally quite abundant in the Lake States and Maine. L. corylisella Chamb. mines the leaves of hazel in Maine. Marmara fasciella Chamb. is widely distributed, probably oc- curring throughout the range of its host, white pine. Eggs are laid on the bark of branches of the host. Young larvae bore through the bark and construct linear mines in the inner bark. Winter is spent as a larva in the mine; pupation occurs during late spring, and adults begin to appear in late May. Several other species of Marmara have been recorded mining the inner bark of twigs of balsam fir, oak, willow, and other trees (258). Phyllocnistis populiella Chamb., the aspen leaf miner, is widely distributed in southern Canada and the Northern States. It feeds on various species of poplar, especially trembling aspen. In the Eastern States, it has been recorded as far south as West Vir- ginia. Eggs are laid near the tips of young leaves in the spring. The larvae form tortuous mines in the leaves (fig. 163), mostly on one side of the midrib (15J*). Noticeable infestations have been observed in Maine. Phyllocnistis liriodendrella Clem, larvae mine the undersides of young leaves of yellow poplar and P. magnoliella Chamb., the undersides of young leaves of magnolia. The mines originate near the outer margins of the leaves and continue tortuously until large portions of the upper surfaces are detached. The damaged areas have a bluish cast. P. liquidambarisella Chamb. mines the leaves of sweet gum. The larvae of Parectopa robiniella Clem, feed in the leaves of black locust, forming triangular, blister-like mines. Callisto geminatella (Pack.), the unspotted leaf miner, occurs throughout the Northern States, west and south to Colorado, Vir- ginia, and Arkansas. Its hosts are apple, quince, pear, sour cherry, wild cherry, plum, and hawthorn. Eggs are laid on the undersides of the leaves, and the larvae devour all
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
