438 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



30th which proved to be Agathis {Cremnops) vulgaris. The moths 

 had entirely disappeared from the fields by the first of September. 



Lantern traps were tested against the second brood of moths but 

 were put out too late to be of value as the moths fly only at night during 

 the first few days after emergence. 



Paris green was used by many farmers, applied by means of a dust 

 sprayer, at the rate of one pound per acre. This did not seem effective 

 against the worms and it severely burned the fohage of the beets. 

 Some used the liquid spray, two pounds of Paris green and one pound 

 of lime to fifty gallons of water. This did not prove effective and the 

 burning was slight. 



White arsenic, one part to four of flour, was used by some. This 

 was very unsatisfactory as it burned the foliage badly and was not 

 effective. 



A tobacco decoction, one pound of stems to one gallon of water was 

 tried. This solution was quite effective burning through the skin of 

 the worms and there was no ill effect on the foliage. 



A 10 per cent solution of kerosene emulsion was used but was not 

 successful. 



Review of the Season of 1910. An outbreak of the pest was ex- 

 pected during the season of 1910 and a careful inspection was main- 

 tained. It was possible to verify the life history and secure further 

 information on the habits of the insect. 



From notes made at Sterling. Colo., bj^ the writer the following are 

 extracted. 



On May 13th a few moths were noticed on weeds in waste places 

 some distance from the beet fields. A cold, windy spell occurred and 

 much retarded the activity of the moths so that fertilization was not 

 generally accomplished until ]\Iay 30th. The first eggs were observed 

 on June 8th and the male moths were becoming scarce. By June 17th 

 the worms were quite abundant and the moths had practically dis- 

 appeared. Parasites were taken often from June 21st to 29th. On 

 July 11th moths of the second brood were taken and on the 13 th they 

 seemed very abundant, though in defined areas. The first eggs were 

 observed on the 16th and the moths were spreading over the entire 

 fields. The maximum number of worms occurred about July 22nd. 

 Parasites were very abundant during this brood and the decreased 

 number of worms evidenced their work. A few moths of the third 

 brood were seen on August 1st. There were practically no larvae of 

 this brood as the parasites had killed most of the moths. 



During the season of 1911 there were very few moths and those were 

 mostly in weeds in neglected places. There was no injury to the beets 



