44 



Howard (L. 0.)- Report of the Entomologist.— C/.^S. Dept. Agric, 

 Bureau Eniom., Washington. D.C., 19th September 1918, pp. 

 11-12. 



In the section of this report dealing with insects affecting the health 

 of man and animals it is stated that the study of the body louse 

 [Pediculus humanus] was taken up during the year under review 

 and all proposed remedies were investigated in co-operation with the 

 National Research Council and the War Department. The work on 

 insects affecting domestic animals has been continued and insects 

 frequenting packing houses and abattoirs have been imder observation, 

 experiments having been made with traps of various kinds. 



KiTASHiMA (T.) & MiYAJiMA (M.). Studleii uber die Tsutsugamushi- 



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

 Archives Expfl. Med., Tokyo, ii, no. 2, 1918, pp. 91-146, 4 plates. 

 [Received 2nd January, 1919.] 



Much information is here given regarding tsutsugamushi or river 

 fever in Japan, where it is endemic in the Niigata district, occurring 

 in riparian localities in the summer. It is identical with the Kedani 

 or Shashitu fever in the Akita district, and in 1913 it was observed 

 along the Mogamigawa River in the Yamagata district. A very 

 similar, or identical fever has been recorded in newly cultivated 

 fields in Formosa. In the years 1904-1909, the number of deaths 

 due to it in the Niigata district totalled 368, and 300 of these cases 

 ended fatally within 20 days, so that its acute character is evident. 

 Popular tradition has ascribed the disease to the bite of a mite 

 [Tro7nbidium akamiishi], but the observations recorded here show 

 that such bites do not always convey infection, since only a few of 

 the mites harbour the virus. 



Dunn (L. H.). Studies on the Iguana Tick, Amblyomma dissimile, in 

 Panama. — Jl. Parasitology, Urbana, III., v, no. 1, September 1918, 

 pp. 1-10. 



Amblyomma disswiile has been taken on various species of snakes 

 commonly found on the Isthmus of Panama. Infestation reached 

 the proportion of 60 per cent, of examined specimens, this percentage 

 being greatly exceeded among those species with habits compatible 

 with infestation, such as the non-burrowing terrestrial and arboreal 

 forms. Toads and iguanas were also found to be frequently infested, 

 but in no case has the tick been found attached to any warm-blooded 

 animal. The author tried the experiment of confining 20 larvae in 

 an uncovered pill-box and applied it to his arm for over five hours, 

 but none of the larvae became attached to the skin during that time. 

 Although A. dissimile has no apparent economic importance, the 

 bionomics and life-history of the species have been studied and the 

 results are given in this paper for comparison with observations on 

 this species in other localities. Tables are given showing the oviposition 

 records of 10 females ; the maximum number of eggs deposited by 

 one individual was 9,254, over a period of 35 days, oviposition beginning 

 6 days after dropping from the host. During rearing experiments, 

 one case was observed in which moulting occurred on the host. This 



