654 EXPEBIMBNT STATION EECOBD. 



on the Isles of Shoals, N. H., and on the hills of New Hampshire. Brief notes 

 are first presented in regard to the structure and function of acuminate and 

 vesicular hairs. 



" In 1913 as a result of the several experiments conducted by using tangle- 

 footed screens and cloth for traps, there were caught on 977 sq. ft. 289 first- 

 stage larvae which had been borne by the wind one-eighth to 1 mile or more. 

 In 1914 there were removed from 1.614 sq. ft. of sticky surface 346 larvae 

 which had been blown from one-eighth to 13.5 miles or more, as verified by the 

 wind records taken at or near those points. Three larvae were also taken 

 from two large screens on the hills in New Hampshire during 1914. 



" Considering the great numbers of larvae taken in these experiments, there 

 can be no doubt that the wind is almost wholly responsible for the general 

 spread of this insect in New England, notwithstanding the fact that many of 

 the former publications teem with explanations of possible accidental or arti- 

 ficial spread by man and animals. ... To prevent continual spread by the 

 wind into new territory the badly infested areas near the border must be 

 brought under control either by natural enemies, or hand methods, or both. 

 Natural enemies, however, are now playing an important role in the control of 

 this insect in the greater area of the inside infested territory. 



" The larvae are sufficiently active and allow themselves to be transported 

 by the wind at temperatures of 55° F. and above, and have been caught at 

 wind velocities varying from 2 to 23 miles per hour, although more active 

 spread takes place when the temperature ranges from 65 to 85° and when the 

 velocity readies 8 miles or more per hour. Larvae are removed from their 

 support and carried by sudden gusts of wind, whether they spin or not, when 

 the temperature reaches 50 to 55°, at which temperatures they often start 

 crawling. 



" The records also show that larvae have been caught at times when winds 

 were blowing from all directions except the North — only a very few coming 

 from the East, but the location of the screens along and near the coast ma- 

 terially alTected this condition. By far the larger number were borne by 

 combinations of the west winds, as indicated on the screen at Merrimac, Mass., 

 which was surrounded by a general infestation. 



" The general progress of the species since its establishment at Medford, 

 Mass., at the rate of 5 miles per year to the northeast and at the rate of 3 

 miles per year westward from Providence, R. I., since its first appearance there 

 in 1901 tends to verify the data that have been collected iu connection with 

 the screen experiments." 



A list of 8 references to the subject and a large size map showing the dis- 

 persion of the gipsy moth in New England and area quarantined in 1914 are 

 included. 



The millet caterpillar, A. Hempel {Fazendeiro, Sao Paulo, 7 (1914), No. S, 

 p. 110; abs. in Rev. Appl. Ent., 2 (1914), Ser. A, No. 11, p. 627).— The larva of 

 Remigia repanda. known in Brazil for at least 12 years, has recently appeared 

 in many parts of the country and a general invasion of this important pest is 

 feared. 



Control of the army cutworm, R. A. Coolet (Montana Sta. Circ. 47 (1915), 

 pp. 1-3). — Since Circular 4 on the army cutworm was issued (E. S. R.. 23. p. 

 S63) particular succpps has been met with in controlling outbreaks of this pest 

 through the use of poisoned bran mash. 



Notes by A. Atkinson on crops to plant where winter wheat has been de- 

 stroyed by cutworms are appended. 



