56 BULLETIN 276, U. S. DEPARTMENT OF AGRICULTUEE. 
1S79. Thomas, Cyrus. Eighth Report of the State Entomologist on the Noxious and 
Beneficial Insects of the State of Illinois. 212 +x p., 47 fig. Springfield, 111. 
Page 64. Describes Siphonophora pisi from specimens collected at Carbondale, 111. Has not 
been observed in this country in injurious numbers. 
1883. Cooke, Matthew. Injurious Insects of the Orchard, Vineyard, Field, Garden, 
Conservatory, Household, StorehoTise, Domestic Animals, etc., with 
Remedies for their Extermination. 472 p., 368 fig. Sacramento. • 
Page 332. Brief notes on the characters of the pea aphis (Siphonophora pisi), injury to 
peas, and remedies. 
1886. Oestlund, O. W. List of the Aphididse of Minnesota, with, descriptions of some 
new species. In 14th Annual Report of the Geological and Natm-al History 
Survey of ]\Iinnssota, p. 17-56. 
Page 25. Siphonophora pisi common in Minnesota. What the author considered same 
was found on Urtica gracilis. 
1887. Oestlund, O. W. Synopsis of the ApMdidee of Minnesota. Geol. and Nat. 
Hist. Survey of Minnesota, Bui. 4, 100 p. 
Page 82. Nectarophora pisi briefly described and recorded from Capsella bursa-pasforis 
and Urtica gracilis. 
1890. Smith, J. B. Catalogue of insects found in New Jersey. In Final Report of 
the State Geologist, v. 2. 486 p. 
Page 448. Siphonophora pisi listed. 
1891. Williams, T. A. Host-plant list of North American Aphididse. Special Bui. 1, 
U^iiv. Nebr., Dept. Ent., p. 5-28. ' " • 
Reported hosts of Siphonophora pisi as follows: Cultivated beet, TrifoUum rcpcns, nettle 
( Urtica gracilis), cultivated pea, shepherd's purse ( Capsella bursa-pastoris). 
1899. Hunter, W. D. A preliminary report on insect enemies of clover and alfalfa. 
In Ann. Rpt. Nebr. State Bd. Agr. f. 1898, p. 239-285, 67 fig. 
Page 246. Lists Siphonophora pisi as a clover insect. 
*1899a. Johnson, W. G. [Nectarophora destructor John.] In American Packer, Aug. 
1, 1899. 
■ Description of the insect, its injuries, outlook, and enemies. 
1899h. Johnson, W. G. The destructive pea louse, a new and important economic 
species of the genus Nectarophora. U. S. Dept. Agr., Div. Ent., Bui. 20, 
n. s., p. 94-98. Same in Sci. Amer., v. 81, no. 21, p. 325, 3 fig., Nov. 18. 
Notice of the appearance of this plant-louse, which will be described as new under the 
name Nectarophora destructor, in very destructive numbers throughout the State of Mary- 
. land. Notes on remedies, habits of insect, and its natural enemies. 
1900. [Bureau op Entomology.] The principal injurious insects of the year 1899. 
U. S. Dept. Agr. Yearbook f. 1899, p. 745-746. 
Page 745. Reports serious injury to peas in Atlantic States by Nectarophora destructor. 
1900a. Chittenden, F. H. Insects and the weather: Observations during the season 
of 1899. U. S. Dept. Agr., Div. Ent., Bui. 22, li. s., p. 51-64. 
Page 58. Nectarophora destructor was troublesome in vicinity of Washington past season. 
1900b. Chittenden, F. H. Th'e destructive green-pea louse. U. S. Dept. Agr., 
Div. Ent., Bui. 23, n. s., p. 33-37, fig. 9. 
Treats following topics: The important outbreak of 1899; mdividual records of injury; 
brief characterization of the insect involved; question of alternate hosts; natural enemies 
and remedies. 
1900. Felt, E. P. 15th Report of the State Entomologist on injurious and other 
insects of the State of New York, 1899 (Bui. N. Y. State Mus., v. 6, no. 31), 
p. 533-653. 
Pages 538, 567. Reports injury to peas on Long Island by Nectarophora destructor 
