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"various kiuds of fencing upon the distribution and abundance of cer- 
tain economic species were reported by Webster in "Science" for 
December, 1892. 
Coming now to the more strictly entomological part of the work of 
the year, we notice the discovery of three or four injurious species new 
to science, — as yet of little economic interest, however, — and a consid- 
erable number of species previously known but reported for the first 
time as injurious; one (a Crambid) to Corn, three to Cabbage, one an 
osage orange species, one infesting Wheat, another the Beet, still others 
the English walnut and other trees, two affecting the Peach, and one 
from Oregon attacking that and several other fruits. That katydids 
injure cranberries was, 1 think, previously known, but the amount and 
method of their injury has been methodically studied by Smith. 
Among beneficial species, the insect parasites of scale insects have 
been most fruitfully investigated and two new forms described, and 
other new parasitic species have been bred from the strawberry weevil, 
the western locust, and so forth. Specially noteworthy are papers by 
Webster and Ashmead on parasitic Hymenoptera of Ohio, several new 
forms of which are economic. 
In the department of life histories and habits, — the basis, as all will 
admit, of our economic work, — a suitable activity has been manitest 
Besides matter of this description contained iu monographic and com- 
plete accounts of various species presently to be mentioned, 1 have 
noticed no less than twenty articles making valuable contributions 
to life histories of economic species, prominent among which are articles 
on the White Grubs (Perkins), the Strawberry Weevils (Beckwith and 
Chittenden), three species of the Grass Leaf-hoppers (Osborn), the 
Elm-leaf Beetle (both Kiley and Smith), the Bud Moth (Slingerland), 
and a Crambid christened by Miss Murtfeldt the Blue-grass Worm. 
Slingerland's experiments on the possible number of annual genera- 
tions in a plant louse species are deserving of special mention here. 
In this connection may be noticed a few items of various importance 
on the subject of the gradual extension of introduced insects — the Horn 
Fly being most frequently mentioned. 
The single species, or larger groups, which have been deemed worthy 
of summary, and usually of exhaustive, treatment from the economic 
point of view, in papers aiming to bring together and present in resume 
the essentials of their economic entomology, and containing new matter 
also, are the Bud Moth, the Cattle Tick, the Pear Leaf-mite, the 
Strawberry Weevil, the Black Peach Aphis, certain of the Sawflies, and 
the Scolytidse of West Virginia. 
The special plant groups whose insect enemies have been summarily 
and comprehensively discussed in a special paper for each group are 
the shade and ornamental trees of Nebraska, the small grains of Ohio, 
and the Blackberry and Baspberry in the same State. Here may be 
