LEAFHOPPERS OF THE STJGAB BEET. 49 
OTHER LEAFHOPPERS. 
Seven species of leafhoppers of the genus Eutettix besides teneUa 
are known to have definite food plant- related to the sugar beet, and 
several more, the food plant of which is not known, will probably be 
found to have similar habits. All of these species will no doubt be 
found on the sugar beet as fast as its cultivation is extended into the 
regions where these insects occur. The following species of Eutettix 
are already known to occur on the beet, and are arranged in about 
the order of their present inrportance. 
Eutettix strdbi Fitch. — The nymph- of Eutettix strobi are thickly 
spotted with red. giving them a strongly reddish appearance. They 
are found on Chenopodi"/,, allium (PL I. fig. 2. a) and are confined 
strictly to the underside of the leaf. The attack produces a red dis- 
coloration and a curling of the leaf, which serves as a double protec- 
tion for the insect. There are two broods in a season, the nymphs 
appearing in late May and early June and maturing from the middle 
of June into July. The adults of this brood are common from the 
middle of June through July. Nymphs appear again late in July, 
from which adults appear late in August, and more commonly in 
September. This species was carefully studied through the first brood 
in 1906. Then the area under observation was pastured and the 
record lost. The Colorado records agree with last year's work for the 
first brood, and furnish data for the second one. Prof. Herbert 
Osborn a first called attention to the red coloring of the leaves. It 
has been noticed many times since. This is. no doubt, the Allygus sp. 
of Brunei^ Forbes and Hart have mistaken the nymph for that of 
Phlepsius irroratus Say/ The larva of P. irrorqfus^howeveT] is brown- 
ish and fuscous and lives on the ground. Eutettix strohi has been found 
on beets (PI. I, fig. 2. h) in a number of places in Colorado and Utah. 
nearly all of them, however, around the margins of fields. In one 
place the insects had appeared on the beets when they were quite 
small, and had been numerous enough to deform every leaf on a 
number of beets and entirely stop their growth. 
Eutettix scitula Ball (PL I. fig. 3).— Eutettix scitula is a white 
species with a brown saddle and brown pronotum. The nymphs are 
of a powdery pink color and live on the underside of the Cheno- 
podium leaf in the same way that those of Eutettix strobi do. except 
that the discolorations are lighter. This species is apparently 
two-brooded. The first brood has been carefully worked out. but 
only adults have been observed in the fall. The broods appear about 
the same time as those of K . strobi. Thi> is a western species occur- 
" Science Vol. X. p. L66, L887. 
*Bul. 23, o. s.. Div. Km.. V . S. Dept Agric, p. 17. 1891 
«' Bui. 80, 111. Agric. Exp. Sta„ p. 424, UKH). 
