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Allegheny Mountains. Last season, and again this year, it was reported 
from Washington County, in the Biue Ridge Mountains. 
_ The grapevine flea beetle, Haltica chalybea, has been very abundant 
this season in the upper counties of the State on grapevines. Many 
complaints came to me the first and second weeks in June, The main 
injury was done to the leaves and not to the unfolding buds. Dusting 
the vines with air-slaked lime was very successfully used; we also used 
Paris green in Bordeaux solution with good results. 
The Hessian fly, Cecidomyia destructor, although not so destructive 
as last season, has been conspicuously abundant in the early sown wheat 
of western Maryland. 
The tussock moth, Notolophus (Orgyia) lewcostigma, has been very 
destructive to shade trees of all kinds in Baltimore City and vicinity 
this summer. Every leaf was taken from some trees, and the cater- 
pillars were so numerous they were a source of much annoyance to 
those residing along the infested streets. 
The bag worm, Thyridopteryx ephemereformis, was reported during 
July, aS seriously injuring Arbor vite and apple trees. Hand picking 
and spraying with Paris green in water was found a Satisfactory 
remedy. | 
The cockscomb elm-leaf gali, Colopha ulmicola, has been quite inju- 
rious to elms this season in the central and northern part of the State. 
The catalpa sphinx, Sphinx catalpw, appeared in unusual numbers 
this season throughout the central portion of the State. Paris green 
in water (5 ounces in 40 gallons) was very successfully used in all 
cases. 
The elm-leaf beetle, Galerucella xanthomelena, has done the usual 
amount of damage to the English elm throughout the State. At the 
experiment station four very large English elms have had scarcely a 
leaf touched. They were sprayed twice last season and twice the year 
before, but have not been sprayed this year. No beetles or young have 
been seen upon them this summer. I attribute this immunity to the 
spraying of last season. The work was thoroughly done, and few, if 
any, beetles escaped. The trees have made an unusual growth and 
are in full foliage. | 
Datana integerrima G. G R.has almost defoliated every black walnut 
tree in the central and northern part of the State. No satisfactory 
remedy has been found. In central Ohio, during August, I observed 
the same insect upon walnut, butternut, hickory, apple, and quince. I 
could not help noticing the complete defoliation of nearly every walnut 
tree along the Baltimore and Ohio Railroad from Bellaire to Newark, 
and from Newark to Columbus. At the present time (August 15) the 
caterpillars are ravaging hickory, apple, and quince wherever they are 
found near an infested walnut tree. 
The melon plant-louse, Aphis gossypii, which was so destructive to 
the cantaloupe crop in 1896, has again this season appeared and ruined 
7277—No. 20 5 
