221 



lack of hygiene encourage the spread of the disease, a delegation has 

 been sent to those regions for the purpose of carr}ang out prophylactic 

 measures. The organisation and eqviipment of the delegation are 

 described, 



Desoil (P.). Observation d'Acariase Laelaptique accidentelle chez 

 le Soldat par una Nymphe migratrice {Iphis aihicularis) du 

 Laelaps stahidaris. [Observation of accidental Mite Infestation 

 of a Soldier by a Migratory Nymph {Ifhis cubicularis) of Laela/ps 

 siahularis.l—C.R Soc. Biol, Paris, Ixxxiii, no. 11, 20th March 

 1920, pp. 371-373. 

 A case is recorded of a French soldier on active service in 1918, 

 whose cap lining was infested with minute Acarids almost invisible 

 to the naked eye, causing slight prrritis at the lower edge of the scalp 

 and on the neck. The mites were hving on the organic residue accumu- 

 lated in the folds of the cap lining, and their presence was evidently 

 of some duration and a result of a biological adaptation to their 

 surroundings. The mite proved to be a Gamasid possessing the char- 

 acteristics of Laelaps stahdaris, Koch, which is an interesting species 

 on account of its polymorphism and 'the distinct biology of its various 

 forms. Three forms of the nymphal stage have been described, viz., 

 a protonymph, /;p^MZy^Z//suej5a^h'(^ws, adeuteronymph, Iphis foenalis and 

 a tritonymph, Iphis cubicvlaris. The form in question corresponded 

 to /. aihicularis, of which the females are much more numeroi s than 

 the males. It has been ol served that while the first-named form Hves 

 on vegetable matter, the other ff)rms have a tendency to migrate to 

 small mammals, such as rats, to which they seek to attach themselves 

 without becoming actually parasitic. 



Sella (M.). Relazione della Campagna antianofelica di Fiumicino 



(1919), con speciale Riguardo alia Biologia degli Anofeli ed agli 



Anofeli infetti. [Report on Anti-anophehne Work at Fiumicino 



(1919), with special Reference to the Biology of Anophelinos and 



to infected AnopheUnes.]— ASecowcfa Relazione della Lotta Anti- 



malarica a Fitimicino (Roma), pp. 81-314, 10 figs., 11 plates. 



[Suxoplement to Ann, d'Igiene, Rome, xxx, 1920.] 



In the author's opinion petroleum is the best of the moscjuito 



larvicides employed, though sodium cyanide may be capable of 



rendering useful service, especially if it again becomes available at its 



pre-war price. 



Of the various methods adopted against the adults the best proved 

 to be hydrocyanic acid gas and smoke, hand-collection, and window- 

 traps. ^Hydrocyanic acid gas and smoke (the latter generated by 

 smoke bombs) are suitable in stables, large rooms and sheds that are 

 not too open ; hydrocyanic acid is the very best fumigant where 

 employable in practice. Hand-collection is well-suited to pig-styes 

 and other small enclosures. 



Besides A. macidipennis {claviger), A. bifurraivs is the only other 

 somewhat common species ab Fiumicino. Its life-cycle is in a certain 

 dec^ree complementary to that of A. ynaadipemiis ; it hibernates as a 

 larva whereas the latter liibernates as an adult, and whilst the principal 

 months for it are October-April, the latter appears from March to 



