191 



FiLiPPiNi (A.). L'Acido cianidrico nella Disinfestazione. [Hydrocyanic 

 Acid Gas as a Disinfectant. | - Ajdi. d'Igicnc, Rome, xxxi, no. 7, 

 July 1921, pp. 419-427. 



This is a general review of the properties and use of hydrocyanic 

 acid gas, which is considered a most valuable fumigating agent. 



Experiments made by Prof. Alessandrini, using 5 grammes of sodium 

 cyanide per cubic metre of space, show that the following are the number 

 of minutes required to cause death : — Diptera : Mttsca domestica, 

 Lucilia and Sarcophaga, 2 ; Calliphora and Stomoxys, 2-3 ; Cidex 

 and Anopheles, 3-4 ; larvae of Stomoxys and Calliphora (10 grammes, 

 per cu. m.), 60. Lice and other parasites: Fediculus capitis and 

 P. hiimanits [vestimenti) , 4-5; Phthirus pubis, Cimex [Acanthia) 

 lectulariits, 5; Haematopinus sitis, 5-6; Pulex, 5-8; and Tyroglyphus 

 farinae, 8-10, development of the eggs being unaffected. 



Sella (M.). Campagna antimalarica nella Spagna. [Antimalaria 

 Work in Spain.]— £/ Sol [Madrid], 25th June 1921, El Liberal 

 [Madrid], 26th June 1921. (Notice in Ann. d'Igiene, Rome, 

 xxxi, no'. 7, July 1921, pp. 435-436.) 



This is a notice of a lecture on the antimalaria work organised in the 

 Spanish province of Caceres by the League of Red Cross Societies with 

 the co-operation of the Spanish Red Cross. 



Malaria causes 11 deaths a year per 100,000 inhabitants in Spain ; 

 in some provinces the mortality is as high as 107T. From 300,000 to 

 400,000 persons are affected by the disease. 



Among the methods that the author proposes to employ are drainage, 

 oiling, screening, quinine prophylaxis, and the use of Gambitsia. The 

 U.S. Bureau of Fisheries has despatched shipments of this iish to Spain, 

 and its acclimatisation is to be attempted. 



The quinine monopoly resulting from the trust of the Java cinchona 

 planters makes quinine very costly, and constitutes a serious obstacle 

 to work against malaria. 



McDuxxouGH (J.). A Revision of the Canadian Species of the affinis 



Group of the Genus Tabanits (Di^ieidt).— Canadian Ent., Gnelph, 



liii, no. 6, June 1921, pp. 139-144. [Received 20th September 



1921.] 



The Tabanids dealt with include the new species Tabanus trcpidus, 



T. niidus, T. nipestris (from Montana) and T. atrobasis. 



The author does not accept Hine's treatment of T. californicits, 

 Marten, as a synonym of T. epistates, O.S., and T. hacmorphonts. 

 Marten, as a synonym of T. sonomensis, O.S. A key is given to the 

 females of the species concerned. 



KiEFFER (J. J.). Chironomides de Philippines et de Formose.— 



Philippine Jl. Sci., Manila, xviii, no. 5, May 1921, pp. 557-593. 

 [Received 20th September 1921.] 



The new Chironomids described include -.— Ceratopogon {Prohelea) 

 chrysothrix, from the Philippines and Formosa ; C. (P.) ftiscimanus, 

 Atrichopogon pruinosus, A. haemorrhoidalis, A. insidaris and 

 A. rufescens from Formosa ; A.flavidus and Cidicoidcs philippinensis V 

 from the Philippines ; and C. alboguttattis from Formosa. Keys are ' \ 



given to the species of the various genera dealt with. 



