)( 



21 



Mosquitoes and Malaria in Formosa. — Taiwan Igakukai Zassi [Jl. 

 Formosa Med. Soc], no. 167, 28th September 1916, pp. 803-808. 

 [Abstract in China Med. Jl., Shanghai, xxxi, no. 2, March 1917, 

 pp. 167-168.] 



The following mosquitos are recorded from Formosa : Culex sitiens^ 

 C. mimeticus, Anopheles {Myzorhynchus) sinensis, A. maculipennis, 

 A. {Neocellia) willmori and A. {Myzomyia) listoni. 



MiYAKAWA (B.), Nagayo (L), Mitamura (D.) & Inamura (H.). Notes 

 on the Mite producing Tsutsugamushi (River Fever of Japan). — 



Taiwan Igakukai Zassi [Jl. Formosa Med. Soc], no. 168, 28th 

 October 1916, p. 859 [359 ?]. [Abstract in China Med. Jl, 

 Shanghai, xxxi, no. 2, March 1917, p. 179.] 



In the cages in which adult examples of the mite, Leptotrombidium 

 (Trombidiuni) ahamushi, had been kept, some forms were found that 

 were identical with them in shape, but which were believed to be 

 nymphs. Details of the structure of the larvae, nymphs and adults 

 of the mite are given. 



Kawamura (R.) & Yamaguchi (S.). Tsutsugamushi (River Fever of 

 Japan) : The probable Finding of the Nymph Stage of the Mite 

 producing the Disease. — Taiwan Igakukai Zassi [Jl. Formosa Med. 

 Soc], no. 168, 28th October 1916, pp. 359-360. [Abstract in 

 China Med. Jl, Shanghai, xxxi, no. 2, March 1917, p. 179.] 



A number of mice infested with mites were placed in a zinc-lined box 

 which was partly buried in sandy soil. When examined a month 

 later, the adult parasite had entirely disappeared and in the soil 

 eight-legged individuals were found similar to the adults, but difiering 

 in structure from the nymphal form previously described by Nagayo. 



MiYASHiMA (K.) & Okumura (0.). TsutsugamushI (Japanese River 

 Fever) : The Egg, Nymph and Adult Form of the Mite, Trombidium 

 akamushi. — Saikin Gaku Zassi [Jl. of Bacteriology], no. 253, 

 10th October 1916, pp. 1-16. [Abstract in China Med. Jl, X 

 Shanghai, xxxi, no. 2, March 1917, pp. 175-177, 3 plates.] ' 



On 9th September 1916, Kawamura and Yamaguchi reported that 

 they had carried the nymphal stage of Leptotrombidium akamushi 

 through a moult to the adult form. A week later the present authors 

 announced that they too had reared the adult form from the immature 

 stages. A certain amount of moisture was found to be required for the 

 metamorphosis of the nymphs and the damp sand had to be protected 

 from the direct rays of the sun. The amount of previous feeding 

 made a considerable difference in the size of the adult mite. 

 Temperature was found to exert an influence on the rate of meta- 

 morphosis from the larval stage to the nymph, requiring about 3 weeks 

 in June and only 6-8 days in August. Summaries are given of the 

 points of noticeable change in the transformation from nymph to 

 adult and of the points of obvious difference by which this adult mite 

 is distinguished from other species which might be confused with it. 



