470 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



Lepidosaphes ulmi Linne. Evidently due to the extremely low tem- 

 perature of January, this troublesome insect received a setback from 

 which it will not immediately recover. Early in the spring, before 

 any growth had started, I noticed that many eggs under the oyster- 

 shell scales were yellowish in color instead of the usual white. These 

 eggs retained their normal shape and since I had seen similar condi- 

 tions previously I thought nothing of the matter. Not all of the eggs 

 under the scales were yellowish; many were white. 



Planning to make some spraying experiments when the young scale 

 insects were hatching I made daily observations in May on some badly 

 infested apple trees at Ames. On one limb of an old tree at Ames I 

 found crawling young insects May 23. Strange to say, however, I 

 found them nowhere else on that tree, nor even in the orchard. The 

 following day, in a badly infested orchard at Hampton, Iowa, I found 

 no crawling scale insects, although apparently sound eggs were ex- 

 tremely abundant under the scales. Again, May 25, at Iowa Falls, 

 Iowa, practically the same conditions were found. These two locali- 

 ties are to the north of Ames, the difference in latitude being about 

 fifty miles for Hampton and thirty-five miles for Iowa Falls. Both 

 these places were visited again late in June but even then there were 

 no signs that any eggs had hatched. Moreover, outside of the one 

 instance mentioned, not another living scale insect of this species was 

 found at Ames. 



The monthly mean temperatures for January, 1912, at Ames were 

 12.7° for the maximum and — 6.5° for the minimum. For three 

 weeks at the first of the year there was some very cold weather and 

 in order to show that it may sometimes be cold in Iowa I have included 

 here the minimum temperatures taken at Ames for the first fifteen 

 days of January. These figures are from the Iowa Climatological 

 service of the Weather Bureau, Report for January, 1912. 



January 1 —16 January 



-10 



Carpocapsa pomonella Linne. Following an abundance of apples 

 in 1911 the crop in 1912 in Iowa was short, being only 15 per cent of 

 normal. This condition was favorable to the codling moth and wormy 

 apples were abundant generally. Even where consistent spraying 



