24 BIBLIOGRAPHY OF COTTON BOLL. WEEVIL. 



No. 246. Pierce, W. D., 1907. — On the biologies of the Rhynchophora of North Amer- 

 ica. <Ann. Rep. Nebr. State Bd. Agr., pp. 209, 295-307, 1 pi. 



Brief history of the species and a Hit of its parasitic enemies. Pages 295 to 309 contain a 

 description and comparison of the pupae of Anthonomus grandis with other species of An- 

 thouomus and a bilaliography of Rhynchophora. 



No. 247. Pierce, W. D., 1908.— Studies of parasites of the cotton boll weevil. <Bul. 

 73, Bur. Ent., U. S. Dept. Agr., 63 pp., 3 pis., 6 figs., January 21. 



A report upon extensive studies of the parasites of the boll weevil and other weevils. 

 Contents: Introduction. History. The work on parasites in 1900. I. Examination 

 work— Records prior to 1906; breeding records of 1906; most favorable plant conditions 

 for parasitism of the boll weevil, field conditions, geographical considerations, boll-weevil 

 status, boll-weevil chronology, conclusions. II. Propagation work: Transfer or artificial 

 propagation of parasites; field work; release of parasites. III. Parasite breeding work: 

 Occurrence of species; geographical and seasonal distribution of parasites; biological notes 

 on the parasites. IV. The sources of the parasites: Parasites known to attack Rhyncho- 

 phora; biologies of the weevils contributing parasites; rotation of hosts. V. Conclusions 

 and prospects. Bibliography. Index. 



No. 248. Pierce, W. D., 1908. — The economic bearing of recent studies of the para- 

 sites of the cotton boll weevil. <Joum. Econ. Ent., vol. 1, pp. 117-122, 

 April. 



Summarization of the work of the Bureau of Entomology in an endeavor to increase the 

 efficiency of parasites of the boll weevil in Texas. 



No. 249. Pierce, W. D., 1908. — Factors controlling parasitism with special reference 

 to the cotton boll weevil. <Journ. Econ. Ent., vol. 1, pp. 315-323. 



Discussion of various factors which affect the abundance and efliciency of parasites in 

 controlling the boll weevil. 



No. 250. Pierce, W. D., 1908. — A list of parasites known to attack American Rhyn- 

 chophora. ^Joum. Econ. Ent., vol. 1, pp. 380-396. 

 Contains a list of all parasites known to attack the boll weevil. 



No. 251. Pino y Soils, Patricio, 1898. — El algodon en la Costa Grande (Estado de 

 Guerrero). <E1 Progreso de Mexico, ano 5, pp. 258-259, February 8. 



Expresses a belief that certain substances in the soil tend to protect the cotton from the 

 boll weevil. 



No. 252. Poe, C. H., 1906.— (See No. 44.) 



No. 253. Quaintance, A.. L., 1905. — Some present-day features of applied entomology 

 in America. <Proc. 17th Ann. Meet. Assoc. Econ. Ent. Bui. 52, Bur. 

 Ent., U. S. Dept. Agr., pp. 9, 11, 14-17, 20-21. 

 Mention of the importance of the boll weevil problem. 



No. 254. Rangel, A. F., 1901. — Estudios preliminaries acerca del picudo del algodon 

 (Insanthonomus grandis I. C. Cu.).-<Boletin de la Comision de Paxasito- 

 logia Agricola, Mex., vol. 1, No. 3, pp. 93-104, 1 pi., 1 fig. 



Contains remarks on previous work, importance of the insect, origin and transportation, 

 biology, character of injury, action of climate on imago, burial of weevils futile. Remedies 

 mentioned include: Proper soil preparation, destruction of stalks, inundation, selection 

 of seed, destruction of fallen squares, insecticides, traps, etc. 



No. 255. Rangel, A. F., 1901. — Segundo informe acerca del picudo del algodon (Insan- 

 thonomus grandis I. C. Cu.).<Boletin de Comision de Parasitologia Agri- 

 cola, Mex., vol. 1, No. 5, pp. 171-176. 



Remarks on hibernation, migration and origin, weevils upon sprout cotton and means 

 of destroying them, collection of adults thought feasible. 



