165 



over the region then infested, and the maintenance of a wide zone free from, 

 cotton along the lower Rio Grande bordering Mexico, with other suggestions 

 of less practical value. This report was submitted December 20, 1894. 



1895. Howard, L. O.— The Mexican Cotton-boil Weevil. Circular 

 No. 6 (second series), Div. Ent., U. S. Dept. Agric, pp. 5, 

 figs. 1-3, April. 



This circular gives the results, substantially, of Mr. Townsend's field inves- 

 tigations of the insect in Mexico and Texas. It is pointed out that time has 

 not offered opportunity to conduct extensive tests with remedies, and the sug- 

 gestions made in this direction are largely from the theoretical side. The 

 impracticability of the use of poisons is shown, and the collection and destruc- 

 tion of infested bolls and rotation of crops are suggested. English and Spanish 

 editions were issued. 



1895. Rios, J. R. — Aparicion del " Picudo " en la Laguna. El Pro- 



greso de Mexico, August 15, 1895. 



1896. Howard, L. O.— The Mexican Cotton-boll Weevil. Circular 



No. 11 (second series), Div. Ent., U. S. Dept. Agric, pp. 8, 

 figs. 1-5. 



While styled a revision of Circular No. 6, Circular No. 14 contains a large 

 amount of additional information relative to distribution, natural history and 

 habits, and natural enemies and parasites, now worked out with substantial 

 accuracy, incorporating the results of field studies by E. A. Schwarz, Mr. 

 Townsend, and the author of the circular. Under the head of remedies is 

 the first suggestion of the great importance of the cultural method of control, 

 and especially the early fall destruction of the cotton plants, together with the 

 recommendation of early planting and clean cultivation. Trapping late 

 beetles in fall and over-wintered beetles in early spring are advised, together 

 with the destruction of volunteer plants, the region infested up to this time 

 being fairly within the range of volunteer or seppa cotton. 



1897. Howard, L. O.— The Mexican Cotton-boll Weevil. Circular 



No. 18 (second series), Div. Ent., U. S. Dept. Agric, pp. 8, 

 figs. 1-5. 



This circular repeats substantially the information conveyed in Circular 14, 

 brings the data on distribution and other features down to date, and in the 

 matter of remedies incorporates the results of field studies in Texas by Mr. 

 C. L. Marlatt on food habits and poisoning, and indicates the supreme impor- 

 tance of the cultural method of control, all other steps being merely palliative 

 or to offset the failure to adopt this method. Issued in English, Spanish, and 

 German editions. 



1897. Rios, J. R. — Aparicion del "Picudo" en la Laguna. El Pro- 



greso de Mexico, Vol. IV, pp. 811-813. 

 A reprint of an article in the same journal for August 15, 1895. 

 1897. Junta de Defensa Contra el "Picudo." Editorial, El Progreso 



de Mexico, Vol. V, pp. 8-9, Octobre 8. 

 1897. El Picudo {Anthonoimcs grandis Boh.) Editorial, Documentos 



referentes a su Existencia en Mexico y a su Invasion in los 



Estados Unidos del Norte. Mexico, Oficina Tip. de la Secre- 



taria de Fomento, pp. 100, figs. 1-5. 



