June, '17] MORRILL: SOUTHWESTERN COTTON PESTS 317 



(15) Morrill, A. W. Cotton' Pests, Sixth Annual Report, Ariz. Comm. Agr. & Hort., 



pp. 37^6. December, 1914. A discussion of the cotton aphis injury 

 at Yuma in 1914 and relation of Hippodamia convergens to its control, of the 

 salt marsh caterpillar, cotton leafworm, cotton bollworm, the differential 

 grasshopper (Melanoplus differentialis) and the cotton leaf perforator. 



(16) Morrill, A. W. Cotton Pests, Seventh Annual Report, Ariz. Comm. Agr. 



& Hort., pp. 41, 43-45. December, 1915. Includes a discussion of a tar- 

 nished plant bug (determined as Lygus sp. near pratensis ) with mention of the 

 cotton leaf perforator, the red spider {Tetranychus bimaculatus) and the boll- 

 worm. 



(17) Morrill, A. W. Cotton Pests, Eighth Annual Report, Ariz. Comm. Agr. 



& Hort., pp. 45-49. December, 1916. Includes an extended discussion 

 of cotton stainer injury to cotton bolls with special reference to the Arizona 

 cotton stainer {Dysdercus albidiventris) , also notes concerning the scarcity of 

 the cotton leaf perforator in 1916 evidently as a result of control by parasites 

 and of the occurrence on cotton in southern Arizona in 1916 of the bollworm, 

 pentatomid bugs, cutworms and Coryzus validus. 

 (IS) Pierce, W. D. The Occurrence of a Cotton Boll Weevil in Arizona. Jour. 

 Agr. Research, vol. I, No. 2, pp. 89-98. November, 1913. This includes 

 notes on the occurrence of the Arizona' wild cotton weevil in Arizona. This 

 insect is described as Anthonomus grandis thurberioe and distinguished by 

 comparative studies from A. grandis. 



(19) Pierce, W. D. and Morrill, A. W. Notes on the Entomology of the Arizona 



Wild Cotton. Proc. Ent. Soc. Wash., vol. XVI, No. 1, pp. 14-23. March, 

 1914. This consists in a report on explorations and observations made by the 

 authors in 1913. Notes are included on the wild cotton boll weevil, the 

 cotton leafworm, the Thurberia bollworm, a bUster mite, a Cecidomyid gall 

 maker, a mealy-bug, the cotton leaf perforator or bucculatrix and a lepi- 

 dopterous leaf folder {Dichomeris deflecta) . A total of eighty-three different 

 species of insects and mites are mentioned including twenty-five which may be 

 classed as injurious. 



(20) Russell, H. M. The Bean Thrips. Bui. 118, Bur. Ent., U. S. D. A., p. 30. 



October, 1912. This bulletin contains four paragraphs quoted from notes by 

 V. L. Wildermuth concerning injury by the bkan thrips {Heliothrips fasciatus) 

 to cotton in the Imperial Valley during 1910 and 1911. 



(21) QuAiNTANCE, A. L. and Brues, C. T. The Cotton Bollworm. Bui. 50, Bur. 



Ent., U. S. D. A., pp. 28, 29. 1905. Contains on pages mentioned a brief 

 statement concerning status of the bollworm in the Lower Sonoran area of 

 the lower Austral life zone. 



(22) TowNSEXD, C. H. T. The Cotton Square Weevil of Peru and its Bearing 



on the BoU Weevil Problem of North America. Jour. Econ. Ent., vol. 4, 

 No. 2, pp. 244-248. April, 1911. The writer presents his views in regard 

 to the future development of cotton growing in the arid Southwest with 

 special reference to the supposed immunity of this section to the cotton 

 boU weevil (Anthonomus grandis). 



(23) . Pink Bollworm. Jour. Econ. Ent., vol. X, No. 1, p. 225. A note 



concerning presence of Gelechia gossypiella in northern Mexico. 



Chairman A. W. Morrill: The next paper on the program will 

 be presented by Dr. H. H. P. Severin. 



