182 



Bertrand (G.)) Brocq-Rousseau & Dassonville. Destruction 

 de la Pimaise des Lits {Cimex lectuhrius, L.), par la Chloro- 

 picrine.- C. R. hebdom. Acad. Sci., Paris, clxix, no. 9, 1st 

 September 1919, pp. 441-443. 



Successful experiments as to the value of chloropicrin gas against bed- 

 bugs, Cimex lectvlarius, are described. A dose of | to ^ oz. to about 

 36 cubic feet proved the most satisfactory. This kills all insects, 

 but should any of the eggs escape, the treatment should be repeated 

 within 2 weeks. 



MiYASHiMA (K.) & Okumura (T.). Trombidium akamiishi and 

 similar Mites froiil Japan, Korea and Formosa. — Saikin Gaku 

 Zassi [Jl. of Bacteriology], no. 266, 10th November 1917, pp. 

 893-908. [Abstract in China Med. JL, Shanghai, xxxiii, no. 4, 

 July 1919, pp. 371-374, 3 plates.] 



The mites from Korea here dealt with were obtained from the ears 

 of wild rats, and are separable into two classes having either short or 

 long hairs on the body. The opinions of various authors are discussed 

 as to the particular mite that is the true carrier of Japanese river 

 fever. The examination of 1,539 indi%d duals collected by the author 

 revearled no intermediates, and they were sharply differentiated into 

 the two species or dimorphic forms. It is considered probable that the 

 short-haired form is ,a result of seasonal dimorphism in the hot cUmate 

 of Formosa and also Japan and Korea, where the temperature during 

 certain months is high. Leptus autumnalis, Shaw, occurring in 

 Formosa, is considered to be the same species as that described from 

 England. Tromhicula ynediocris, Berlese, a similar form in Formosa, 

 is closely related to Tromhicula sp., reported from Java, but is decidedly 

 different from the adult of the red mite, Trombidium akamiishi. 



Beakdt (F. R.). Report of the Veterinary Department for the Year 



1918. — Ann. Rept. Agric. Dept. Northern Provinces, Nigeria, 

 1918, Lagos, 29th May 1919, pp. 7-11. [Received 25th 

 September 1919.] 



The individual belts of Glossina in the Northern Provinces of Nigeria 

 have not yet been definitely located, but in addition to known infested 

 areas most of the country south of a hne drawn east and west from 

 about 20 miles south of Zaria must be regarded as probably fly- 

 infested, especially in the rainy season. Cattle transferred there from 

 fly-free areas have developed trypanosomiasis more than three months 

 after arrival, indicating that infection must have been contracted 

 locally. Several cases of unidentified diseases, affecting cattle about 

 two months after their migration for the dry season to southern areas, 

 have come under the notice of the veterinary department, and subse- 

 quent examination of blood showed the presence of trypanosomes 

 of the vivax type. Two outbreaks occurred in Northern Zaria among 

 herds that had not moved for the dry season. As careful search for 

 tsetse-fly gave negative results, the transmission must be attributed 

 to other biting flies, which are common. The conditions described 

 for cattle apply equally to horses. 



