

== 
emergence; (4) a slightly more rapid rate of development for Dendrocto-— 
nus monticolae broods occurred at 7,000 feet elevation than at 3,800 
feet, even though daily maximum and minimum temperatures at the higher 
elevation were 10 degrees lower in each case. Evidence in this case 
leads to a belief that too high temperatures retard development; (5) 
in an emergence-reattack cage, only five attacks were made on the sec-— 
ond tree from reemerged beetles after a period of 2 months." 
CEREAL AND FORAGE INSECTS 
Response of sorghum midge to humidity.--E. V. Walter and Lee Sea- 
ton, San Antonio, Tex., state that "During June and July the sorghum 
able * * * Apparently during the extreme drought many of the larvae and 
pupae entered a period of aestivation and emerged as adults in the fields 
after the August rains set in. The sorghum fields in general show ex- 
treme irregularity in blooming this year, owing to the drought. Heads 
that appeared in June and July were so rare that they were not harvested 
and were left standing in the fields. A heavy emergence has come from 
these heads, and the heads maturing later are now rather heavily in- 
fested with the midge. This again shows the value of crop uniformity in 
the control of the midge." 
Unusual migration of leafhoppers.-——- "An unusual migration of 
Empoasca fabae Harr. took place on August 8 and 9. Diabrotica 12- 
punctata also came to light in great abundance on August 8," reports F.W. 
Poos, of Arlington Experiment Farm, Rosslyn, Va. "The wind traps also 
recorded this unusual migration. An examination of this Empoasca mate- 
rial showed that less than 3 percent were females." 
Three-lined blister beetle distinguishes species of Crotalaria .—— 
W. A. Douglas, Crowley, La., reports that "Epicauta lemniscata Fab. at- 
tacked Crotalaria spectabilis and completely defoliated it, while they 
did not touch Crotalaria intermedia growing in the same plat and on the 
row next to it. The beetles, after devouring the Crotalaria spectabilis, 
Skipped over the Crotalaria intermedia and started feeding on Biloxi soy- 
beans. They were controlled with sodium fluosilicate. These beetles 
have been very abundat during the entire month of August and are still 
showing varietal preferences in Soybeans." 



Lesser migratory locust found in wide range of altitude.--Accord— 
ing to W. B. Cartwright, Sacramento, Calif., "A second appearance of 
Velanoplus mexicanus Sauss. in alfalfa was reported from Imperial Valley, 
Calif., the first week in August. This report, as have previous reports 
and observations in other years, indicates two generations of this spe- 
cies in the Mojave desert and the Imperial Valley. It is of interest to 
note that M. mexicanus was collected at an elevation of 9,600 feet on 
ee ee ee 
the Sonoma Pass on August 6, 1933." 
Lesser migratory locust dominant species in North Dakota outbreak. 
-—J. R. Parker, Bozeman, Mont., reports that a cooperative survey of grass-— 
