
          714.

pods are already in the plants.

322

June 13, 1902.  With botany classes to Catonsville and the Observatory.
At the terminus we watched several female locusts depositing
eggs.  We watched for some time, hoping to see one move
and make a new slit in the bark, but did not see any.  A
twig cut in a plane at right angles to the slits shows that the
locust bores and deposits eggs obliquely to the right and obliquely to
the left so that a section of the twig presents almost the appearance
of the trail made by some animal thus [sketch of egg trail].
It seems as if the boring is done in most cases into last years
wood.  The following trees and shrubs were added to the list of
plants attacked.  Silver Maple, Chestnut, Viburnum acerifolium,
Beech, Witch hazel, Ash and Blackberry.  We went down
Hilton Av.  As we passed through the field at the corner of Frederick
Av., I showed them Erigeron annuus, E. strigosus &  E. Philadelphicus
and explained how to distinguish one from the other; - annuus
has <s>broad</s> broad leaves coarsely toothed, in strigosus, the leaves are
narrow & generally entire, and in Philadelphicus we have broad leaves coarsely
toothed, clasping the stem. We left Hilton Av. when we came to the
path leading to the Lilium Philadelphicum place and followed it into
        