56 BULLETIN" 276, IT. S. DEPARTMENT OF AGRICULTURE. 



1879. Thomas, Cyrus. Eighth Report of the State Entomologist on the Noxious and 

 Beneficial Insects of the State of Illinois. 212+xp.,47fjg. 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, Storehouse, 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, 0. W. List of the Aphididse of Minnesota, with descriptions of some 



new species. In 14th Annual Report of the Geological and Natural History 

 Survey of Minnesota, p. 17-56. 



Page 25. Siphonophora pisi common in Minnesota. What the author considered same 

 was found on Urtica gracilis. 



1887. Oestlund, 0. W. Synopsis of the Aphididse of Minnesota. Geol. and Nat. 



Hist. Survey of Minnesota, Bui. 4, 100 p. 



Page 82. Nectarophora pisi briefly described and recorded from CapseUa bursa-pastoris 

 - 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 Bid. 1, 



Univ. Nebr., Dept. Ent., p. 5-28. 



Reported hosts of Siphonophora pisi as follows: Cultivated beet, Trifolium repent, nettle 

 ( Urtica gracilis), cultivated pea, shepherd's purse ( CapseUa 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. 



1899b. 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. n. s., p. 51- 64. 



Pago 58. Nectarophora destructor was troublesome in vicinity of Washington past season. 



I'.'onb. Chittenden, F. II. The destructive green-pea louse. U. S. Dept. Agr., 

 Div. Ent., Bid. 23, n. s., p. 33-37, fig. 9. 



Treats following topics: The important outbreak of 1899; individual records of injury; 

 brief characterization of the insect involved; question of alternate hosts; natural enemies 

 and remedie - 



l!i(io. Felt, E. 1'. L5th Eteporl of the State Entomologisl on injurious and other 

 insects of the State of New York, 1899 I 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 



