tO 
Experiments conducted by C. E. Woodworth, Walla Walla, with sul- 
phur as a rearing medium for wireworms are reported as follows: "Pre-— 
liminary experiments showed that large wireworms could survive in vials 
of undiluted sulphur to which water and food had been added. Recent ex- 
periments involving 1,000 young wireworms showed that the sulphur is al- 
most as good as soil for the development of these larvae. i eee 
series of experiments also indicates rather clearly that ground sulphur 
is not a good insecticide for the destruction of wireworms in the soLiw” 
Mr. Woodworth has found in studies of mortality of wireworms "a 
very noticeable slowing in the death rate between the second and third 
months of life. For example, in the 20° C. cabinet there were placed 
250 month-old first-instar larvae. At the end of a month 80 per cent of 
these were killed or had died. At the end of the second month only 20 
oer cent of the remainder, or 5 per cent of the original number, had met 
a similar fate. Field observations tend to support the view that there is 
an early high mortality with asubsequent high survival afterafew months." 
Reporting on the life history and habits of the sand wireworm 
(Horistonotus uhleri Horn), P. K. Harrison, Fairfax, S. C., says: "No 
females of this species were to be found during the month of August. 
Males were very scarce. At the beginning of August there were approxi- 
mately 245 larvae in individual cages. At the end of the period there 
were 78. The stages of the larvae in breeding cages at the end of August 
were approximately as follows: 
First instar -—- 10.3 per cent 
Second instar — 55.1 per cent 
Third instar -- 30.7 per cent 
Fourth instar — 3.9 per cent" 
In his work on the external morphology of the beet leafhopper, 
J. ©. Chamberlin, Twin Falls, Idaho, reports: "One interesting develop— 
ment along this line has been the discovery of a well-developed wing-— 
coupling apparatus which apparently occursin most, if not all, leafhoppers 
(Cicadellidae). So far as can be ascertained this structure is undescribed 
in entomological literature--at least in the more general sources." 
The population of beet leafhoppers on various hosts in the 
vicinity of State College, N. Mex., for the month of August is reported 
by V. E. Romney as follows: "Lepidium alysscides has maintained a fair 
population of beet leafhoppers during August, in spite of the fact that 
both Trianthema portulacastrum and Acanthochiton wrighti appeared in 
the same environments. The latter two host plants support several times 
more leafhoppers than the mustard, but the mustard will draw the entire 
population by the latter part of September." 
Host—plant preferences of the beet leafhopperat Riverside, Calif., 
and beets. "The greatest numbers are found on A. semibaccata and, 
since all the Riverside collections were from this host, the average of 
o7.9 for this district is considerably higher than for the otherdistricts." 
