21 



P. dnhoscqui, Nev. Lem. {roubaudi, Newst.). Descriptions are given 

 of P. papatasii, Scop., apparently the predominant European species ; 

 P. sergenti, Parrot, occurring in Algeria, Spain and Portugal ; 

 P. perniciosns, Newst., common in Europe and Africa and of which 

 P. legeri, Mansion, and P. lusitanicus, Fran9a, are synonyms ; 

 P. mimdus, Rond., from Algeria and Spain. An Italian species, 

 P. mascitlii, Grassi, is mentioned, but not described. There is a key 

 to the above species and to P. ingrami, Newst., and P. simillimus, 

 Newst., both occurring in Africa. Tables are included, drawn up by 

 Dr. L. Parrot, of micrometric measurements of P. sergenti, 

 P. perniciosns and P. minutus africanus. 



The role played by Phlehoiomus in disseminating diseases is reviewed. 

 They are regarded as vectors of three-day fever, and probable trans- 

 mitters of Oriental sore and of verruga in Peru. In Portugal the 

 author has failed to find the Herpetomonad parasite discovered by 

 Wenyon at Aleppo in 1910 and suggests that this may be a cultural 

 form of Leishmania tropica. In 1914 Mackie found Herpetomonads 

 in about 11 per cent, of the examples of P. minutus taken at Madras 

 and named them Herpetomonas phlebotomi. According to Parrot 

 these midges are parasitised in Algeria by Acarids. 



Orr (H.). a practical Hot Air Disinfector. — Parasitology, Cambridge, 

 xi, no. 3-4, October 1919, pp. 267-278, 5 figs. 



It has been proved that both adults and eggs of Pediculus humanus 

 are killed in 10 minutes when exposed to a dry atmosphere at a 

 temperature of 50° C. and 55° C, and this method has many advantages 

 over treatment with steam or sulphur dioxide. Many types of 

 disinfectors have been introduced and employed since 1915 ; the one 

 here described and illustrated was used throughout the British 

 Expeditionary Forces and is easily constructed in a few days. 



Keilin (D.) & NuTTALL (G. H. F.). Hermaphroditism and other 

 Abnormalities in Pediculus humanus. — Parasitology, Cambridge, 

 xi, no. 3-4, October 1919, pp. 279-328, 6 plates, 28 figs. 



The differentiation of sexes in normal lice is discussed and the 

 various abnormalities found in examining 155 hermaphrodite examples 

 of Pediculus humanus are described. Laboratory experiments show 

 that the probable cause of hermaphroditism under natural conditions 

 is the crossing of P. capitis and P. corporis, which are considered to 

 be only races of P. humanus. This cross-breeding is also always 

 accompanied by a great decrease in the proportion of females to males. 

 Other anatomical abnormalities of P. humanus are also discussed. 



NuTTALL (G. H. F.). The Systematic Position, Synonymy and 

 Iconography of Pediculus humanus and Phthirus pubis. — 

 Parasitology, Cambridge, xi, no. 3-4, October 1919, pp. 329-346. 



The contents of this paper are sufficiently indicated by its title. 



