FEN es 
NOTES FROM THE TEMPE (ARIZONA) FIELD STATION. 
March 19, 1917. 
Our already unusual winter has continued by giving us five killing frosts 
during the month of March. This is the first time that we have had a killing 
frost during the month of March at the Tempe laboratory since it was established 
in 1911. The average mean temperature for February and March, to date, has been 
ten degrees lower than the same period last year. 
This has caused some interesting insect activities. Aphis maidis has 
been exceptionally numerous upon the barley crop, since it seems to be too cold 
for developement of parasites; while the majority of other insects have been very 
inactive, and such forms as Chaetoenema ectypa, Languria mozardi and 
_Bruchophagus funebris have not as yet started oviposition when in past seasons, 
the first generation has usually been well under way by this time, We will await 
with interest the affect of these unusual conditions upon insect life this coming 
season, 
ye +i Or Pa ae 
[Signed] V. L. Hildermuth 

