OBSERVATIONS DURING THE SEASON OF 1909. 43 
to be fairly swarming with several species of the leafhoppers. The 
species in greatest abundance was Deltocephalus afinis and the next 
most abundant was probably Cicadula 6-notata, then Deltocephalus 
debits Uhl. with D. inimicus very scarce or wanting. How the 
species ordinarily occurring on cultivated grasses have reached this 
isolated patch is an interesting question. 
Another series of interesting records was made at Bozeman, Mont., 
on the grounds of the Montana Agricultural College. In plats of 
wheat, oats, and barley, Cicadula 6-notata was found fairly common 
but not abundant. This species appears to follow these crops 
entirely across the country throughout the Northern States and also 
to occur on some of the grasses. 
At Pullman, Wash., wheat during this season was very free from 
jassids although I was informed by Mr. Geo. I. Reeves, of the Bureau 
of Entomology, of attacks of a species of Dicraneura. Cultivated 
grasses, however, were considerably infested, timothy by Deltocephalus 
inimicus and D. afinis, and a red-top grass by D.inimicus, D. affinis, 
Cicadula 6-notata, and Thamnotettixz geminatus. Both clover and 
alfalfa were infested in considerable abundance by Athysanus eviti- 
osus, Cicadula 6-notata, and Deltocephalus inimicus. Wild grasses of 
this vicinity show a great variety of leafhoppers, and it would appear 
that they are quite an important economic problem. 
At Kalispell, Mont., the wheat fields appeared to be entirely free 
from leafhopper injury, a few leafhoppers only being found in volun- 
teer wheat and oats along the roadsides. The usual species, however, 
were found in considerable abundance in the autumn grasses and a 
number of species in the wild grasses growing on the unbroken land. 
One of the most conspicuous species here was Athysanus sexvittatus 
Van D., which was taken especially from a tall red-top grass 
(Festuca ?). 
At Williston, N.Dak.,on the grounds of the North Dakota Agricul- 
tural Experiment Station, the jassids were found on wheat, oats, alfalfa, 
and clover, but not in any case in such abundance as to be a serious 
menace to the crops. Deltocephalus inimicus and Oticadula 6-notata 
were the most frequently met. The annual grasses showed rather 
more than the usual abundance and possibly from the lateness of the 
season or because of the dryness of the grasses in this locality showed 
more than the usual amount of withering. A field which had been 
flooded earlier in the season included very few jassids and suggests 
the possibility that they may have been quite extensively drowned 
out. Alfalfa of the 1908 planting was free from jassids, while the 
fields of Bermuda grass of the second year’s planting had a much 
greater abundance than on the first year’s plants. In spots here and 
there were Deltocephalus inimicus and D. nigrifrons, Cicadula 6-notata, 
and Dreculacephala mollipes. Collections were also made at Devil’s 
Lake and Grand Forks, N. Dak., but with little difference in the char- 
