THE PEA APHIS WITH RELATION TO FORAGE CROPS. 59 



1901. [Bureau of Entomology.] The principal injurious insects of the year 1900. 

 IT. S. Dept. Agr. Yearbook f. 1900, p. 725-729. 



Page 726. Serious injury to peas by Nectarophora destructor along Atlantic coast and west- 

 ward to Wisconsin. Remedies. 



1901. Chapais, J. 0. L'aphis des pois. In Nat. Canad. , v. 2S, no. 2, p. 17-20, Feb. 

 Reports serious injury to sweetpeas in August of 1900. Describes the insect (after John- 

 son). Observations of injury and remedies. 



1901a. Chittenden, F. H. Remedies for insect pests in vegetable and flower 

 gardens and conservatories. 4 p., 4 fig. Philadelphia. 

 Remedies for the pea louse. 



1901b. Chittenden, F. H. The destructive green pea louse. U. S. Dept. Agr., 

 Div. Ent., Circ. no. 43. 8 p., 3 fig., May 23. 



A concise account of Nectarophora destructor Johns, as a pest of peas, under the following 

 headings: Recent injury, descriptive, distribution, extent of injury and method of work, 

 natural enemies, and method of control. 



1901. Felt, E. P. Voluntary entomological services of New York State. In 16th 

 Report of the State Entomologist on Injurious and Other Insects of the 

 State of New York f . 1900 (Bui. N. Y. State Mus.), v. 7, no. 36, p. 1000-1026. 



Pages 1003, 1017. Correspondent reports Nectarophora pisi not so injurious on Long Island 

 as previous year. Also reported from Broome County. 



1901. Fernald, C. H., and Fernald, H. T. Report of the entomologists. In 

 13th Ann. Rpt. Hatch Expt. Sta. Mass. Agr. Col. f. 1901, p. 84-88, Jan. 

 Page 87. Injury to peas by pea louse in 1900 but not so great as in 1899. 



1901a. Fletcher, James. Injurious insects in Ontario during 1900. In 31st. Ann. 

 Rpt. Ent. Soc. Ontario f. 1900, p. 62-72, fig. 14-32. 



Page 66. Nectarophora destructor not as abundant in 1900 as in 1899; notes reported injuries, 

 remedies, and natural enemies. 



1901b. Fletcher, James. Report of the entomologist and botanist. In Canada 

 Expt. Farms Rpts. f. 1900, p. 195-249+ii, 18 fig. 



Page 211. Nectarophora destructor was present in same districts as in the preceding year 

 (1899) but in less injurious numbers. Notices of injuries and discussion of natural enemies, 

 especially of the orange larva of a species of Dlplosis. 



1901c. Fletcher, James. Farm pests; fodder grasses. Evidence of Dr. James 

 Fletcher, Entomologist and Botanist, before, the Select Standing Com- 

 mittee on Agriculture and Colonization f. 1901, 25 p. 

 Page 20. Notice of injuries by the destructive pea aphis. 



1901. Harvey, F. L. Notes on insects of the year 1899. In 16th Ann. Rpt. Maine 

 Agr. Expt. Sta. f. 1900, p. 31-42. 



Page 31. Reports Nectarophora destructor abundant and destructive to garden and field 

 peas. 



*1901a. Johnson, W. G. The destructive pea-louse. In Rural New-Yorker, v. 60, 



no. 2659, p. 17, fig. 7, Jan. 12. 

 *1901b. Johnson, W. G. Green pea industry threatened. In Amer. Agr., v. 67, 

 no. 6, p. 202-203, 2 fig., Feb. 9. 

 1901. L., H. H. Pea louse in field peas. In Rural New-Yorker, v. 60, no. 2672, 

 p. 267, April 13. 



H. H. L. writes of field peas, grown with barley, being ruined in 1900 by the pea aphis. 

 Suggests earlier planting. 



1901a. Sanderson, E. D. Some plant Lice affecting peas, clover, and lettuce. 

 In Canad. Ent., v. 33, no. 2, p. 31-39, pi. 2, Feb. 



Description of the winged and wingless viviparous female and winged male, together with 

 comparisons with other species and supposed varieties. Concludes pisi of Europe and 

 destructor of America identical. 



