74 
LEAFHOPPERS AFFECTING CEREALS, ETC. 
Mont., July 24, on grass; at Williston, N. Dak., in wheat, oats, 
alfalfa, and clover, and in brome grass of second-year planting; at 
Devils Lake, N. Dak., on bluegrass and timothy, and at Grand Forks, 
N. Dak., on bluegrass (lawn) and in a stubble field, including red-top 
and clover; at Castalia, Ohio, August 13, abundant in bluegrass and 
volunteer wheat, and at Toledo, Ohio, August 27, in bluegrass 
pasture and field of Hungarian grass; at Columbus, Ohio, September 
1 and 16 and October 8, in bluegrass, and at Akron, Ohio, September* 
11, in stubble field (wheat), including timothy and clover; at 
Wooster, Ohio, September 14, in clover, alfalfa, and low-ground 
pasture and in plat of mammoth millet; at Urbana, 111., September 
28, in a timothy and clover field; at Lafayette, Ind., October 4 and 5, 
in bluegrass pasture, in alfalfa, on volunteer wheat, in clover, and in 
Fig. 12.— The inimical leafliopper (DeltocepJialus inimicus): Nymphal stages; a, newly hatched; b, c, 
d, later stages, the details of tarsal appendages shown below. All enlarged. (Original.) 
a wheat plat, newly started; at Fort Benjamin Harrison near Law- 
rence, Ind., October 6, in stubble field, including mixed grasses, 
clover, and other vegetation; at Hamburg, N. Y., October 20, in 
wheat, new growth, and at Valencia, Pa., on November 2, in new 
growth of wheat; at Harrisburg, Pa., November 5, none in wheat but 
a few in grass; at Reading, November 6, in grass and a few in wheat; 
at Newark, Del., November 9, in wheat (a few) and in grass; at 
College Park, Md., November 11, in grass and only a few in wheat, 
oats, and barley; at Arlington, Va., November 12, in grass and wheat; 
at Washington, D. C, November 13, in grass; at Knoxville, Tenn., 
November 22, on bluegrass, orchard grass, and fall barley. In June 
(22-24), 1910, it was found abundant at Mackinac Island and Sault 
Sainte Marie, Mich., both in wheat and grass. Nearly all taken were 
