131 



Of 40 A. liuilowi reared from larvae and fed on suitable carriers, 

 52 per cent, became infected. Six A. liidloi&i similarly fed were, 

 after the appropriate interval, again fed, on three uninfected 

 persons. All of these developed malaria in from 14 to 18 days. 



Emphasis is laid on the importance of ascertaining whether an 

 Anopheline that feeds on man restricts itself to that host or is attracted 

 to others, such as A. umhrosns and A. iessellatus, which also feed on 

 fowls ; A. umbrosiis, A. subpictus and A. indefinitus, which also feed 

 on cattle ; and A . albimanus, which specially attacks horses. A species 

 that only attacks man will be corresponding^ dangerous in dissemin- 

 ating human malaria, since the parasites it carries will not be lost in 

 other hosts. 



Geiger (J. C.) & PuRDv (W. C). The Malaria Problem of the Rice 

 Field of the United States. — Southern Med. JL, Biyiningha>n, Ala., 

 xiii, no. 8, August 1920, pp. 577-584. (Abstract in Trop. Dis. 

 Bull., London, xvii, no 2, 14th February 1921, p. 133.) 



The information given here has already been noticed from other 

 sources [R.A.E., B, vii, 74; vhi, 63, 64]. 



Seguy (E.). Les Moustiques de France. — Bull. Mus. National Hist. 

 Nat., Pay is, 1920, nos. 3, 4, 5 and 6, pp. 223-230, 322-329, 407-414 

 and 512-519, 19 figs. 



These papers are continuations of those already noticed [R.A.E., B, 

 vih, 224J, and include keys to the species of Oclilerotatus and Theobald ia, 

 with a description of Ochlerotatiis les)iei, sp. n. 



Rizzi (M.). Nuovo Indirizzo di Profilassi antimalarica. [A new Form 

 of Anti-malaria Prophylaxis.] — Ann. d'Igiene, Rome, xxix, no. 11, 

 30th November 1919, pp. 748-751. 



Referring to Roubaud's suggestion that animal quarters should be 

 used to protect human dwellings from malaria [R.A.E., B, viii, 141], 

 the author claims that this point was first recognised and applied at 

 Trinitapoli, Italy. The following experiences at and around that 

 place show the conditions under which this method affords protection. 



In a locality that was usually non-malarious, numerous Anophelines 

 were found in one stable, which had proved useful in concentrating 

 them in a house inhabited by one person, thus freeing the surrounding 

 zone containing many inhabitants. In one village in a malarious 

 locality Anophelines were only found in small numbers and in a few 

 outlying houses, but at two points, half a kilometre away, two large 

 cow and sheep shelters contained many individuals. 



A third instance is that of Trinitapoli itself, a town that frequently 

 suffers from malaria. It was not possible to free all the large ponds 

 in the vicinity from Anophelines. The mosquitos steadily increased 

 in stables, etc., but at first only m the direction of the ponds. An 

 increase of their numbers in the stables was, however, followed by 

 their appearance in the nearest town dwelling ; but by supplementing 

 the protection afforded by the stables, by artificial anti-mosquito 

 measures, the town was kept free from fresh infections and from 

 mosquitos. 



Reliance on the vicinity of stables, etc., is therefore not sufficient 

 in itself and may, indeed, prove definitely harmful. 



