38 SOME INSECTS INJURIOUS TO TRUCK CROPS. 
RECORD AT MONROE, UTAH. 
In Monroe, Sevier County, the season opened early, and the beets 
were nearly all planted in April. An examination April 22, as men- 
tioned above, failed to discover a single leafhopper. 
On June 26, on a second visit, nearly all the beets were in fine 
shape, with leaves touching in the rows, and only lacking a few 
inches of touching across rows. The leaf hoppers were present in 
every patch, both adults and very small nymphs, and occasionally a 
larger nymph was seen. Mr. Fred Gould, field superintendent, said 
that he had observed the adults for some time. There were more leaf- 
hoppers on the older patches than on the late planted ones, indicating 
that they had migrated in before the younger beets were far enough 
advanced to attract them. 
On July 25 the leafhoppers had increased in numbers, averaging 
from 10 to 20 to a beet on the earlier patches. Adult males were com- 
mon, showing that the nymphs had commenced to change to adults 
again. All stages of nymphs were still common, howeA^er. 
On September 14 the numbers of leafhoppers were beginning to 
decrease. Several countings gave an average of 7 males to 5 females 
and 5 large nymphs. The dissection of a number of females showed 
no eggs developed as yet, and there seemed little doubt that they 
would hibernate. 
OTHER RECORDS IN UTAH. 
A field belonging to a Mr. Irons at Moroni, Sanpete County, was 
visited June 27, and an average of one leafhopper to every two beets 
was found. Mr. Irons, who is a very careful observer, said that they 
had been there for some time. A careful search was made for the 
nymphs, but none was found. This was by far the worst infested 
field in the county, the average being less than one insect to ten beets. 
July 26 adults and nymphs were about equally common, and few of 
either. 
In the Cache Valley and the rest of the northern end of the State 
the leafhoppers did not appear in sufficient numbers to enable one 
to make any life-history notes. On this account all cage experiments 
were transferred to Lehi. 
CAGE EXPERIMENTS, LEHI, UTAH. 
The field observations on life history were all checked by cage 
experiments (PL IV, figs. 2, 3). Cages 1 to 3 were failures, through 
the adults escaping from the material used. Later a very fine silk 
scrim was used and proved satisfactory for the life-history work, but 
was too closely meshed to obtain normal temperature and moisture 
conditions inside. All cages were run in pairs on similar beets, one 
with insects and one without, as a check on the injury to the beet. 
