457 



Os Insectos damninhos. xvi. Gorgulho do Coqueiro, Rhynchophonts 

 palmanmi, L. [Injurious Insects, xvi. The Coconut Weevil, 

 R. palmar urn.'] — Chacaras e Quiniaes, S. Paulo, x^iiii, no. 6, 

 15th June 1921, pp. 467-468, 2 figs. 



The injury done by Rhynchophorus palmarum, L., to coconut 

 palms in Brazil is of far less importance than that done by rhinoceros 

 beetles and similar species. It should, however, be combated ener- 

 getically. The head of the palm may be well sprayed with a solution 

 made by mixing borax 10 lb., unrefined sugar 10 lb., and boiling 

 water 5 gals. Other sprays are arsenious anhydride, carbon bisulphide, 

 or petroleum. As R. palmarum is not limited to the coconut palm, 

 other palms should be watched, as they may become dangerous 

 breeding places. 



MoREiRA (C). Algumas Pragas do Coqueiro. [Some Coconut 

 Pests.] — Chacaras e Quintaes, S. Paulo, xxiii, no. 6, 15th June 

 1921, pp. 470-471. 



Beetle pests of the coconut received from the State of Bahia have 

 been identified as a Longicorn, Ctenoscelis acanthopus. Germ., hitherto 

 unknown as a coconut pest, and a Hispid, Mecistomela [Coraliomela) 

 corallina. Vigors. 



Smith (G. D.). Studies in the Biology oJ the Mexican Cotton Boll 

 Weevil on Short-staple Upland, Long-staple Upland and Sea 

 Island Cottons. — U.S. Dept. Agric, Washington, D.C., Bull, 

 926, 19th April 1921, 44 pp., 1 plate, 18 figs. [Received 22nd 

 July 1921.] 



A study has been made of the biology of Anthonomus grandis, 

 Boh. (Mexican cotton boll weevil) occurring east of the Mississippi 

 river, and the results of many tests and observations are given in a 

 series of tables. Most of the investigations were made at Madison, 

 Florida. It was found that there was practically no difference in the 

 longevity of weevils on sea-island and upland cottons, nor in their 

 developmental period either in short-staple or long-staple upland, 

 or in sea- island cotton squares. Soil temperatures of 120° F. and higher 

 usually proved fatal to immature weevils under field conditions. A. 

 grandis in this locality shows a decided tendency to form a new variet5\ 

 The hibernation of the weevils is incomplete, and the adults are seldom 

 inactive for more than thirty days at a time. Emergence from 

 hibernation is very gradual, the total daily emergence bearing a direct 

 relation to the total daily rainfall. The total percentage of hibernat- 

 ing weevils that survived the winter of 1918-1919 in Madison, Florida, 

 ■was 7-54. 



Davidson (W. M.) & Nougaret (R. L.). The Grape Phylloxera in 

 California.— L^5. Dept. Agric, Washington, B.C., Bull. 903. 

 22nd April 1921, 128 pp., 10 figs., 11 plates. [Received 22nd 

 July 1921.] 



The history and distribution of Phylloxera vitifoliae. Fitch, in 

 California are reviewed. The nomenclature and synonymy are also 

 dealt with and the various stages are described. The life-cycle in 

 California is probably purely parthenogenetic, and therefore greatly 



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