OBSERVATIONS DURING THE SEASON OF 1910. 49 
In the vicinity of Long Beach, Cal., several of the common species 
were plentiful in fields of mixed grass and clover and in the native 
salt grass near sea-level Lonatura minuta Van D. occurred ia large 
numbers and in different stages. The barley fields were quite free 
from leafhoppers, as also the oats fields, although several of the com- 
mon species were represented in the other fields. 
Nearly the same conditions were observed at Sierra Madre, Cal., 
March 25. The fields of barley, oats, clover, and alfalfa were quite 
free from leafhoppers, the greatest abundance being found in a field 
of barley where Athysanus exitiosus was fairly common. 
At San Diego and La Jolla, Cal., severe rains interfered with good 
work, but at the latter place a number of species were secured from 
grasses and oats. 
At Whittier, Cal., on March 29, on a warm sunny day, leafhoppers 
were quite abundant in fields of barley, oats, grass, clover, and 
alfalfa, and in one field particularly on a southern hillside several 
species were swarming in great abundance in both larval and adult 
stages. 
At Bakersfield, Cal., August 30, collections were made on wild 
erasses and other plants and particularly on clover, burr clover, and 
alfalfa. Several species were abundant. Athysanus exitiosus was 
plentiful, as also several species of Deltocephalus. Three species of 
Agallia occurred on clover and on a wild species of legume. Other 
species occurred in less abundance. 
At Fresno, Cal., March 31, collections were limited to wild vegeta- 
tion, but the Athysanus exitiosus was found abundant in both larval 
and adult stages. Deltocephalus of a black variety (/uscinervosus 
Van Duzee) was fairly plentiful and Agallias were swarming in some 
patches, evidently where the legumes were most plentiful. 
At Modesto, Cal., March 31 and April 1, a number of fields of oats, 
barley, and alfalfa were examined, but the leafhoppers were not 
abundant. Tho scarcity of Athysanus exitiosus in oats fields would in- 
dicate its preference for the native grasses, at least for egg deposition. 
Collections in the vicinity of San Francisco, Berkeley, Palo Alto, 
and Davis, Cal., gave slight results owing to unfavorable weather. 
At Logan, Utah, wheat fields were apparently free from leafhoppers 
but the weather was too cold to favor their activity. Several species, 
however, were found active among the native grasses and larve of 
Deltocephalus and Cicadula were quite plentiful in some places. 
At Grand Junction, Colo., April 17, jassids were active in alfalfa 
and the wild grasses of the locality. 
At Pueblo, Colo., several species were found in bluegrass, the most 
abundant being Deltocephalus affinis. In the wild plains, grasses of 
several species were common and Athysanella very abundant. 
