462 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol, 12 



with the possibiHty that the worms may come to thrive on many of 

 the common weeds and field crops of the arid sections of the north- 

 western states, as it does in Europe, presents a more serious problem 

 of control than has been dealt with by European investigators. The 

 writer has made studies which show that the nematodes may be spread 

 through the hay, straw, and, to some extent at least, through the seed 

 from infested clover fields. They are also doubtless carried on the 

 fleet of animals, the wheels and other parts of farming implements, and 

 to some extent in the water of irrigation ditches. It is probable that 

 irrigation water plays an important part in spreading the worms from 

 infested plants to other plants in the same field. 



It is anticipated that the futher investigation of the problem will be 

 conducted as a cooperative project between the Idaho Experiment 

 Station and the Bureau of Plant Industry. 



Bibliography 



1 "Handbuch der Pflanzenkrankheiten, " by P. Sorauer, Berlin, 1913. 

 -Yearbook, U. S. Department of Agriculture, 1907, p. 582; also Phytopathology, 

 Vol. 4, p. 118, 1914. 



3 Phytopathology, Vol. 4, pp. 45-46, 1914. 



^ Personal Correspondence, July, 1919. 



5 Journal Economic Entomology, Vol. 11, pp. 423-424, 1918. 



A MIGRATING ARMY OF MILLEPEDS 



By Fred E. Brooks, Bureau of Entomology, Entomologist, Deciduous 

 Fruit Insect Investigations 



t During the past fifteen years the writer has on several occasions 



[observed in the central part of West Virginia armies of millepeds, 



Fontaria hrunnea, migrating over the ground in woods and fields. 



: These armies have moved either in scattered or densely formed com- 



■ panies, sometimes only two or three to the square foot and at other 



times averaging a hundred or more to the square foot. In one or 



more instances the millepeds have been known to invade strawberry 



plantations at the time the fruit was ripening where they would coil 



j about and feed upon the over-ripe fruit and so cover the ground about 



j the plants that picking of the fruit had to be abandoned. One man 



informed the writer that while gathering wild blackberries he chanced 



to look down and saw his shoes and all the ground about them covered 



with a mass of crawling thousand-legged worms, whereupon he beat a 



hasty retreat. Such armies have been seen by the writer at Hampton 



and near Buckhannon, in Upshur County; near Weston, in Lewis 



County; and, more recently, near Littleton, in Wetzel County. 



