143 



seven cases of leprosy studied. The author believes that it is possible 

 that D. folliculorum distributes the virus of leprosy on the patient 

 himself and that it may perhaps also transmit the disease to healthy 

 individuals. 



Oesterlin (E.). Erfahrungen tiber den mechanischen Schutz gegen 

 Malaria. [Practical Knowledge relating to Mechanical Protection 

 against Malaria.] — Arch. f. Schiffs- u. Trop.-Hyg., Leipzic, xxiii, 

 no. 3, February 1919, pp. 49-57. 



On his appointment as Malaria Inspector at Durazzo early in 

 1917 the author was led to adopt mechanical measures of protection 

 against mosquitos as the only workable method under the conditions 

 then obtaining in Albania. Individual protection was found to be 

 useless, as the men often lacked either the intelligence or the will, 

 or both, to employ nets in a proper manner. Mass protection was 

 successful, either in the form of an indoor cage enclosing a raised 

 wooden platform accommodating a number of sleepers, or in that of a 

 similar, but larger cage, erected out of doors under a weather-proof 

 roof. In both cases the height was 2 metres, allowing free movement 

 but making it diilicult for mosquitos that entered to escape capture. 

 Doors with a well-fitting frame were used, double doors being provided 

 for the outdoor building. The latter could house 100 men and was 

 divided lengthwise by a passage, and each half was again divided into 

 2 sections for 25 men each. This sub-division enabled any intruding 

 mosquitos to be easily caught. Paper netting was the material 

 used ; this proved superior to the ordinary article in many ways and 

 was remarkably resistant to rain. 



SiKORA (H.). Zur Kleiderlaus-Kopflausfrage. [The Body- and Head- 

 Louse Question.] — Arch. f. Schiffs u. Tropen-Hygiene, Leipzic, 

 xxiii, no. 4, February 1919, pp. 65-67. 



In a previous paper it was stated that normal Pediculus capitis fed 

 on the arm for several generations attained the average dimensions of 

 P. humanus {vestimenti) [see this Review, Ser. B, vi, p. 191]. This has 

 now been found to be incorrect. 



If the length of the femur in the foreleg in the male and the number 

 of rows of abdominal muscles (2 in P. humanus and in 1 P. capitis) in 

 the female be accepted as reliable and constant characters, the indefi- 

 niteness of other characters and the variability in size is to be explained 

 by the presence of the crosses between the two which make the mor- 

 phological identification of a single individual quite impossible. An 

 examination of the host and of the largest possible number of parasites 

 is necessary to determine the species present. 



Rickettsia pediculi, which sometimes occurs in P. hmnanus, was 

 never found in P. capitis. In crosses positive findings of Rickettsia 

 were noted on several occasions. 



Traitement de la Gale des Pattes de Volailles. [Treatment of Mange in 

 the Feet of Domestic Birds.] — La Vie AgricMe ct Rur., Paris, ix, 

 no. 26, 28th June 1919, p. 472. 



Parasitic mange of the feet attacks a number of birds, particularly 

 poultry. The disease is very contagious, but is confined to birds, and as 



