87 



KiTASHiMA (T.) & MiYAJiMA (M.). Studieii iiber die Tsutsugamushi 

 Krankheit. [Studies on the Tsutsugamushi Disease.] — Kitasato 

 Archives Exptl. Med., Tokyo, ii, no. 3, December 1918, pp. 237- 

 334, 2 figs, 9 plates. [Received 17th March 1919.] 



This paper, which is a continuation of a previous one [see this 

 Review, Ser. B, vii, p. 44], deals chiefly with the virus of tsutsugamushi 

 or Japanese river fever. This is carried by field mice, which also 

 harbour the transmitter of the virus, a Trombidiid mite very similar 

 to the European Leptus autumnal is. The description given of the 

 development and life-history of the mite supplements a previous 

 account by Miyajima and Okumura [see this Review, Ser. B, vi, 

 p. 21]. The authors .disagree with Tanaka [loc. .cit., p. 50] and 

 consider the mite infesting man to be identical with that found in 

 the ears of field mice. A louse, Haeniatojnnus spimdosus, and a 

 Haemogamasid mite, Laelaps echidninus, also infest the mice, and 

 the adults of Laelaps have sometimes been mistaken for those of the 

 akamushi mite. The reports of various observers show that the 

 akamushi mite has a wide distribution, at least in Eastern Asia, and 

 occurs in fever-free areas as well as in infected ones. Infestation of 

 mice by the mite is most marked in July, August and September, 

 wliile in December and January such infestation may be held to be 

 non-existent. Larvae taken from a mouse became adult in 10 weeks, 

 and the larva requires about 3 weeks in September to hatch from 

 the egg. It may therefore be assumed that the whole development 

 requires about 3 months in the warm season. A comparison of the 

 larval and adult stages of this mite and allied species leads to the 

 supposition that the akamushi mite is a species of the genus Trombiciila, 

 Berlese, and nearly identical withT. coarctata; and furthermore that 

 Leptus auhmmalis, Shaw, is the larva of an as yet undetermined 

 species of Tromhicula, contrary to the views of European workers 

 who consider that the akamushi mite and L. autumnalis belong to 

 the genera Trombidium or Microfrombidium. 



Gray (D. T.). Report of the Animal Industry Division. — 40lh Ann. 

 Rept. North Carolina Agric. Expt. Sta. for Year ended 30lh June 

 1917 [Raleigh] [n. d.], pp. 33-63. [Received 18th March 1919.] 



Mites on poultry can be controlled by the use of sulphur in solution 

 or by a nicotine solution free from the stems and leaves, lime, sulphur 

 or tobacco leaves in a dry state being useless. To prepare nicotine 

 solution for this purpose 2i lb. of stems and leaves should be put in 

 sufficient water to cover them, boiled for one hour, the liquid drained off 

 and boiled down to \ U.S. pint, which is then mixed with 4 oz. water in 

 which has been placed one tablespoonful of nicotine with one quart 

 measure of plaster of Paris. This should be stirred and passed 

 through a fly-screen sieve, when it is ready for use. 



Metz (C. W.). Some Aspects of Malaria Control through Mosquito 

 Eradication. — U. S. Public Health Repts., Washington, D.C., xxxiv, 

 no. 5, 31st January 1919, pp. 167-183, 4 figs. 



The institution of malaria-control operations as the accompaniment 

 of recent militiiry activities has resulted in the introduction of numerous 

 (C568) a2 



