302 



Other scales that have been recorded on mangroves are Cfenochiton 

 rhizophorae, Mask., in Austraha, Mesolecaniunt rhizophorae, Ckll., in 

 Brazil,, and ChrysompJialus rhizophorae, Ckll.. in Mexico. 



Johnson (E.) & Coad (B. R.). Dusting Machinery for Cotton Boll 

 Weevil Control. — U.S. Dept. Agric, Washington, D. C. Farmers' 

 Bull. 1098, January 1920, 31 pp., 5 figs. [Received 18th May 1920.] 

 Recent tests with poison-dusts against the cotton boll weevil [An- 

 thonornus grandis] have given satisfactory results, and it is considered 

 that this practice is hkely to spread rapidly. Suitable machinery is 

 an essential factor in success and much attention has been given to the 

 development of various types, as cotton dusting involves the treatment 

 of much more extensive areas than have formerly been treated by this 

 method. The present bulletin is considered only as a progress report 

 and is issued solely for the purpose of recording the information on 

 dusting machinery that has been secured up to the present time. The 

 special factors governing the construction of the cotton-dusting 

 machine which are discussed, include the type of labour available, 

 the areas to be treated in plantations and in the field, field conditions, 

 the necessity for night operation, the characteristics of poison utihsed 

 and the type of dust cloud required. The recommendations given in 

 this paper are not, however, considered in any way final, and it is 

 expected that improvements will be developed from time to time for 

 years to come. 



Warren (D. C). Dusting Cotton for the Control of the Boll Weevil. 



—Georgia State Bd. Entnm., Atlanta, Bull. 56, February 1920, 

 15 pp., 2 figs. [Received 20th May 1920.] 

 While a considerable amount of experimental work has been done 

 in various ]jarts of the United States in dusting cotton for the control 

 of the cotton boll weevil [Anthonomus grandis], it has been found 

 essential that special tests should be made under Georgia conditions. 

 Particulars are given of the experiments that have been carried out, 

 and the results show that the method was successful in practically 

 every case. Directions are given for applying poison, the various 

 materials that may be used, of which calcium arsenate has given the 

 best results, the dosage and number of applications, and suitable 

 machinery. 



Chase (W. W.). The Principal Parasites of the Peach. — Georgia 



State Bd. Entom., Atlanta, Bull. 57, Revised Ed. of Bull. 43, 



March 1920, 45 pp. 11 plates. 



Much of the information contained in this bulletin has been noticed 



elsewhere [R. A. E., iv, 261]. The mounds suggested for the control of 



AegeHa (Sanninoidea) exitiosa, Say, should be formed between the 15th 



July and 1st August. 



Hayes (W. P.) & McColloch (J. W.). Some Observations on the 

 Genitalia of Lachnosterna. — Ann. Entom. Soc. America, Columbus, 

 Ohio, xiii, no. 1, pp. 75-80, 2 plates. 

 This paper is the result of the examinations of about 50,000 indivi- 

 duals of Lachnosterna from Kansas. The genitalia of nine species are 

 discussed, as well as specific and sexual determination in the pupal stage. 



