THE PEA APHIS WITH RELATION TO FORAGE CROPS. 
59 
1901. [Bureau of Entomology.] The principal injurious insects of the year 1900. 
U. S. Dept. Agr. Yearbook f. 1900, p. 725-729. 
Page 72G. Serious injury to peas by Nectarophora destructor along Atlantic- c-oikst an«i west- 
ward to Wisconsin. Remedies. 
1901. Chapais. J. C. L'aphls des pois. In Nat. Cai.ad.. \ . 28, no. 2, p. 17-20. Feb. 
Reports serious injury to swectpeas in August of liKK). Describes the insect (after John- 
son). Observations of injury and remedies. 
1901a. Chittendex, F. H. Tiemedies for insect pests iii vegetabh^ ai.d flower 
gardens and conservatories. 4 p.. 4 fig. Philadelphia. 
Remedies for the pea louse. 
1901h. Chittexdex. F. H. The destructive green pea louse. I'. S. Dept. Agr., 
Div. Ent.. Circ. no. 43. 8 p.. 3 fig.. May 23. 
A concise accoimt of Nectarophora destructor Johns, as a pest of peas, under the following 
headings: Recent injury, descriptive, distribution, extent of injurj' and method of work, 
natural enemies, and method of control. 
1901. Felt. E. P. Voluntary entomological services of New York State. Jn 16th 
Report of the State Er.tomologist on Injurious and Other Insects of the 
Stale of New York f . 1900 (Bui. X. 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. Ferxald, C. H., and Ferxald, H. T. Peport of the entomologists. In 
13th Ann. Ppt. 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 durir.g 1900. Li 31st Ann. 
Ppt. Ent. Soc. Ontario f. 1900, p. 62-72, fig. 14-32. 
Page 66. Nectarophora destructor not as abtmdant in 1900 as in 1S99; notes reported injuries, 
remedies, and natural enemies. 
1901b. Fletcher, James. Report of the entomologist ar.d botanist. In Canada 
Expt. Farms Ppts. f. 1900. p. 195-249 + ii, 18 fig. 
Page 211. Nectarophora destructor was present in same districts as in the preceding year 
(1S99) but in less injurious numbers. Notices of injuries and discussion of natural enemies, 
especiallj* of the orxulge larva of a species of Diplosis. 
1901c. Fletcher, James. Farm pests; fodder grasses. Evidence of Dr. Janus 
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 lC)th Ann. Ppt. Maine 
Agr. Expt. Sta. f. 1900, p. 31-42. 
Page 31. Reports Nectarophora destructor abundant and destructive to garden and field 
peas. 
IDOla. JoHXSox. W. G. The destructive pea-louse. Li Rural Xew-Yorker, v. (iO, 
no. 2659. p. 17, fig. 7, Jan. 12. 
1901b. JoHXSOx, W, G. Green pea industry threatened. In Anier. 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. IT. L. writes of field peas, grown with barley, being ruined in HMX) } y the yoa aphis. 
Suggests earlier planting. 
1901a. Saxdersox, E. D. Some plant lice affecting peas, clover, and h'ttuce. 
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 Kurope and 
destructor of America identical. 
