decreasing frequenc}- was : A. indefinitus, A. aconitus, A. puncttilatus, 

 A. kocM, A. harhirostris, A. ftdiginosus, A. hyrcanus, and A. siibpictiis. 

 It is not possible to reduce the number of rice-fields under cultivation, 

 but it is suggested that they should no longer be flooded after the rice 

 has matured, that no fields be left flooded after the harvest, and that 

 no second crop should be g^o^^•n except where the prospects are very 

 fair. If the first two points are rigorousty observed, the third is of 

 minor importance. 



S^^"ELLE^•GREBEL (X. H.) & S^^-ELLE^-GREBEL DE Graaf (J. M. H.). 

 Report on the Occurrence of Malaria and Anophelines at Samarang. 

 — Meded. Burg. Geneesk. Dienst. Xed.-Indie, Weltevreden, 1919, 

 no. 10, 1920, pp. 113-168, 5 plates, 13 tables, 6 diagrams, 4 maps. 

 [Also in Dutch.] 



The investigations recorded here were carried out in the municipahty 

 of Samarang from July to October 1918. Two malarial centres were 

 found, the larger one being along the coast and the smaller one at the 

 foot of the hills. The former is a centre of permanent, the latter 

 probablv of intermittent, malaria. The larval and adult distribution 

 of Anopheles ludloui covers the coastal malaria centre. The maximum 

 fl-^dng radius of A. ludloivi at Samarang is estimated at 1,700 3'ards ; it 

 certainly did not exceed 3,800 3-ards at the time the investigation 

 was made. The natural infection index was: A. hidlowi 4-1, 

 A. siihpictus {rossi) 0-7, and A. indefinitus • 1 . B\' the end of November 

 the nimiber of Anophelines had considerably increased, though 

 A. ludlowi had decreased. The difference was due to an increase of 

 A. suhpictus and, in the coastal \dUages, to an even greater increase 

 of A. indefinitus. 



Krausse (A.). Mittel gegen die MUcken. [Preparations for Use 

 against ^losquitos.j — Zeitschr. angew. Entom., Berlin, \ii, no. 1, 

 September 1920, p. 197. 



Up to the present no repellent is kno^^•n that ^^ill afford protection 

 against mosqioitos for as long as 6 or 7 hours, and further experimental 

 work is necessary-. Wliite clothing is of some value in keeping these 

 pests awa}'. In Sardinia the cloth wound about the head as a protection 

 against the sun appears to dri^•e away mosquitos b}' flapping in the 

 wind. 



Heerdt (W.). Die neuen Verfahren und Vorrichtungen zur Sanierung 

 von ungezieferverseuchten Wohnstatten. The new ]\Iethods 

 and Appliances for disinfecting \'ermin-infested Dwellings.]— 

 Zeitschr. angew. Entom., Berlin, vii, no. 1, September 1920, pp. 

 201-205. 



Notes are given on the properties and action of hydrocj^anic acid 

 gas and sulphurous anhydride, and on the methods of using these 

 substances for disinfecting habitations. 



HoDGKiNS (J. R.). Presence of Gastrophilus equi in the Dog. — Vet. 

 Jl., London, Ixxvi, no. 11, November 1920, pp. 417-418. 



Attention is drawn to the occurrence of Gastrophilus equi in a dog. 

 The possibihty of this fly maturing in such a host is however thought 

 imhkely. 



