158 



BisHOPP (F. C). Flytraps and their Operation. — U.S. Dcpt. Agric, 

 Washington, B.C., Farmers' Bull. 734, March 1921 (2nd revision), 

 16 pp., 7 figs. [Received 22nd July 1921.] 



This bulletin is a revision of a previous edition, and the bulk of the 

 information has already been noticed \_R.A.E., B, iv, 181]. 



A modification of the conical hoop trap is described. 



Experiments in Texas prove that properly baited traps are a success- 

 ful measure against the screw-worm fly, Cochliomyia {Chrysomyia) 

 maceUaria, F., injuring live-stock. All carcasses and animal refuse 

 should be promptly burnt to prevent breeding. Traps should be kept 

 near watering places and where cattle congregate. The conical traps 

 here described should be set on a board platform two feet square, 

 securely fastened to a tree, where the trap and bait will be the least 

 cUsturbed by animals. Dried gut slime, 1 pt. slime to 10 or 20 pts. 

 water, is a satisfactory bait. 



An attractive bait for house-flies etc., is 1 lb. curd from milk and 

 J lb. brown sugar, with sufficient water to moisten it ; this will be 

 effective for ten days or more if kept moist. Bran mash made thin with 

 equal parts water and milk, with the addition of a few tablespoonfuls 

 of brown sugar, and cornstarch and a yeast cake, is also a lasting bait. 



HixE (J. S.). Description oJ Horseflies from Middle America. II. — 



Ohio Jl. Sci., Columbus, xx, no. 8, June 1920, pp. 311-319, 1 fig. 

 [Received 25th July 1921.] 



A key is given to separate the genera of Pangoniinae occurring in 

 Middle America, and the following new species are described : — 

 Pangonia melanopus from Mexico, P. delta from Arizona, and P. parishi 

 from Ecuador. The following new Tabaninae are also described : — 

 Tahanus pundipleura, Dichelaccra inelanosoma, and D. anaiis from 

 Costa Rica, T. fumomarginatus from Brazil, D. mclanoptcra and 

 D. ochracca from British Guiana, and D. caloptcra from Mexico. 



Kuniiakdt (J. C. G.) cv- Chitre (G. D.). An Experiment in the Eradi- 

 cation of Plague Infection carried out in the Poona and adjacent 

 Districts; First Report for the Period 1914-16. — Indian J I. 

 Med. Res., Calcutta, viii, no. 3, January 1921, pp. 409 445, 13 

 tables, 13 charts, 5 maps. 



KuNHARDT (J. C. (i.) cv CiiiTRE (G. D.). Furtlicr Experiments in 

 Plague Prevention carried out at Poona ; Second Report for the 

 Period 1916-18.-^ /6/(/., pp. 446-489,27 tables. [Received 28th 

 July 1921.] 



The first report describes experiments carried out in the Poona 

 District from 1914-16 to eradicate plague by means of intensified 

 rat destruction, but chiefly owing to the inadequacy of the methods 

 employed the experiments were not successful. 



The second report describes the technique employed in 1916-18 

 to determine the efficiency and the ingredients of various rat baits, 

 and miscellaneous experiments with these baits, from which it was 

 found that barium carbonate is the most efficient rat poison, and 

 arsenious acid is a suitable substitute. 



