204 



Vallejo (E. L.). Instracciones para combatir la Plaga de Langostas. 



[Instructions for combating the Locust Pest.] — Rev. Agric, 

 Mexico, i, no. 7, 1st December 1917, pp. 288-289, 3 figs. [Received 

 13th February 1922.] 



The Section for Bacteriology of the Department of Parasitology, 

 of the Department of Agriculture, Mexico, suppHes sealed tubes of 

 cultures of Coccobacillus acridiorum for use against locusts. These 

 cultures require to be developed and inoculated by a bacteriologist 

 if the method is to be successful. 



Algunas Maneras de combatir las Hormigas. [Some Methods for 

 combating Ants.] — Rev. Agric, Mexico, ii, no. 7, 1st June 1918, 

 pp. 304-306. [Received 13th February 1922.] 



A useful poison-bait for ants is made by boiling 15 lb. of granulated 

 sugar and 108 grains of tartaric acid crystals in 7 pints water. After 

 cooling this must be mixed with a cooled solution of 324 grains sodium 

 arsenite in 17 J fluid oz. hot water, to which 24| oz. of honey has been 

 added when cool. This bait is stable at high temperatures and 

 remains attractive for a long period. The quantity of poison must 

 not be increased, otherwise the ants will not have time to carry the 

 bait into their nests. The latter may be flooded with a liquid prepared 

 by diluting with 48 parts water one part of an emulsion of 1 lb. soap 

 and 1 pint carbohc acid (black, 100 per cent.) in 1 gal. water. A 

 poisonous banding, which must not come in contact with metal, can 

 be prepared by mixing 308 grains of corrosive subhmate with 2 oz. 

 54 minims of ethyl alcohol and 46 grains of shellac. Adhesive bands 

 can be employed to protect trees. 



Documentos para servir a la Historia del Gusano rosado en Mexico. 



[Documents relating to the History of the Pink BoUworm in 

 Mexico.] — Rev. Agric, Mexico, iii, no. 11, 1st February 1919, 

 pp. 423-428, 1 fig. [Received 13th February 1922.] 



This contains Dr. A. Busck's report, dated 21st November 1918, 

 to the Mexican government regarding the infestation of cotton in 

 the Laguna district by Platyedra {Pectinophora) gossypiella, Saund. 

 [R.A.E., A. v, 389, etc.]. 



Herrera (M.). La Cochinilla o Pseudococcus cacti. [The Cochineal 

 Insect, Dactylopius coccus.] — Rev. Agric, Mexico, iv, no. 4, 

 15th April 1919, pp. 164-171, 2 figs. [Received 13th February 

 1922.] 



This article describes the history of the cochineal insect, Dactylopius 

 coccus {Pseudococcus cacti), its life-history on Opuniia coccinellifera 

 and the industry and trade connected with it. 



Hempel (A.). Tres novos Coccideos. [Three new Coccids.] — Arch. 

 Escola Sup. Agric e Med. Vet., Nictheroy, v, no. 1-2, September 

 1921, pp. 143-146, 1 plate. [Received 15th February 1922.] 



The Brazilian Coccids described are Saissetia anonae, sp. n., from 

 soursop ; Alecanochiton marquesi, gen. et sp. n., from coffee ; and 

 Tachardia artocarpi, sp. n., from jak [Artocarpus], cashew [Anacar- 

 dium cccidentale] and Terminalia catappa. 



