44 



other chamber is loaded, so that the articles in it may be somewhat 

 warmed by the time the blast is switched on to it. Immediately this 

 is done the first chamber is unloaded at its other end, its doors being 

 quickly closed to conserve the heat. After unloading, the framework 

 is taken through the chamber back to its loading place and prepared 

 for the next operation. A bibhography of eight references is given. 



Hase (A.). Beitrage zu einer Biologic der Kleiderlaus {Pediculus corporis, 

 de Geer = vestimenti, Nitzsch). [Contributions to the Biology of 

 the Clothes-louse.] — Centralbl f. BaU. Parasit u. Infektionskr. 

 he Aht. Referate, Jena, kiv, no. 17-18, 16th May 1916, pp. C28- 

 530. [Abstract from Flugschr. H. 1. der Deutschen Gesellschqft f. 

 angewandte Entomologie ; Brunswick, Faul Parey, 1915, 95 pp., 

 47 figs. Price 3 M.] 



This paper embodies the observations and experiments made in 

 the camp for Russian prisoners at Hammerstein, West Prussia, in 

 March and April, 1915. The author considers that morphologically 

 and biologically Pediculus capitis (head-louse) and Pediculus humanus 

 (clothes-louse) are distinct species. The fife-history and habits are 

 described in detail. Lice were found to make their way through both 

 sand and earth 12 inches deep, if it is dry, and were able to live for 

 four days beneath it. Temperature governs the length of time that 

 a louse can live without food, and varies from one day at 98° F., to 

 nine or ten days at 42° F. Dry cold is equally Avell borne by both 

 eggs and adults ; even 10° F. does not kill them. While damp and 

 cold combined are easily resisted, damp and heat quickly kill all 

 stages. Dry heat of about 122° F. causes death after one-half to 

 three-quarters of an hour. 



Hase (A.). Ueber die Entwicklungsstadien der Eier und uber die 

 Larven der Kleiderlaus {Pediculus corporis, de Geer = vestimenti, 

 Nitzsch). [The developmental Stages of the Eggs and the Larvae 

 of Pediculus humanus.'] — Centralbl. /. Bakt. Parasit. u. Infek- 

 tionskr., Ite Aht. Referate, Jena, Ixiv, no. 17-18, 16th May 1916, 

 p. 530. [Abstract from Naturw. Wochenschr., xxxi, 1916, p. 1.] 



The development of fice in the egg-stage is dealt with. In older 

 text-books the incorrect statement is made that the eggs of 

 P. hutnanus (vestimenti) hatch in three or four days, whereas the time 

 required is six days, though a few individuals may exceptionally 

 hatch on the fifth day. A knowledge of the developmental forms 

 within the eg^ is important, as this \^all often permit of the day of 

 infestation being ascertained and the moment of infection with 

 typhus calculated. 



Richardson (C. H.). The Attraction of Diptera to Ammonia.— ^«n. 



Eutom. Soc. America, Columbus, Ohio, ix, no. 4, December 1916, 

 pp. 408-413. 



The facts dealt with in this article were obtained while carrying 

 out experiments on the responses of the house-fly to certain chemical 

 compounds, and relate to the other species of Diptera which entered 

 the traps more or less regularly [see this Revieiv, Ser. B, iv., p. 106]. 



