36 



SiKORA (H.). Beobachtungen an Rickettsien, besonders zur Unter- 

 scheidung der R. proimzeki von R. pedicidi. Vorlaufige Mitteilung. 



|''Obser\-ations on Rickettsia spp., particularb; concerning the 

 Differentiation of R. prowazeki from 7?. pedicnli. Preliminary 

 Communication.] — Arch. Schiffs- u. Trop.-Hyg., Lcipsic, xxiv, 

 no. 11, November 1920, pp. 347-353, 1 fig. 

 The contents of this paper are indicated by its title. 



Fkiederichs (K.). Neues iiber Kriebelmiicken. [New Information 

 on Simuhids.] — Berliner Tien'irztl. Wochcnschr., Berlin, xxxvi, 

 no. 48, 25th November 1920, pp. 567-569. 



Since the publication of a preliminary paper [R.A.E., B, viii, 215] 

 new facts render a further one desirable, and the key previously given 

 is reprinted in a more complete form. 



Simiiliimi nolleri, sp. n., is described from Thuringia. Another 

 species, 5. atisteni, Edw., from Hamburg, appears to be new to 

 Germany. The male differs from S. morsitans, Edw., only in the form 

 of the h3^popygium. 



Edwards has expressed doubt whether S. ornatum, S. aureum and 

 5. latipes are blood-suckers in England [R.A.E., B, iii, 140]. In 

 Mecklenburg cattle are never attacked by them, nor by S. pratorum. 

 In fact, they do not bite warm-blooded animals. There may be even 

 more non-biting species. This accounts for the absence of losses 

 among cattle in Mecklenburg, the biting species, 5. mactdatum, 

 S. reptans and 5. argyreatnm, being scarce there. 



RuppERT ( — ). Beobachtungen iiber Schadwirkungen von Kriebel- 

 miicken bei Sehafen in der Umgebung von Friesack (Mark). 

 [Observations on Simuliid Injury to Sheep in the Neighbourhood 

 of Friesack (Mark).] — Deutsclie Tierdrztl. Wochcnschr., Hanover, 

 xxviii, no. 49, 4th December 1920, pp. 579-580. 

 An account is given of injury to sheep in 1920 as a result of Simuliid 



bites. A number of the animals had to be slaughtered. Cattle were 



also severely attacked in 1918, 1919 and 1920. 



VAN Breemen (M. L.). Further Particulars relating to the Malaria 



Problem at Weltevreden and Batavia. — Aledcd. Burg. Geneesk. 



Dienst Ned. -Indie, Weltevreden, 1920, no. 4, pp. 63-115, 1 plate, 



1 map. 



In a previous report [R.A.E., B, vii, 96] the author attributed to 



fishponds the responsibility for a large amount of malaria owing to 



their breeding Anopheles {Myzomyia) ludlowi, Theo., in enormous 



numbers. This paper contains final conclusions by the author and 



Dr. A. L. J. Sunier on the subject. 



Besides the marine fishponds, there are many other swamps in the 

 brackish water area that are important as breeding places. Under 

 certain conditions, such as the temporary or local absence of the fish, 

 Haplochihis panchax, and other enemies of mosquito larvae and pupae, 

 enormous quantities of mosquitos may be produced. 



The only satisfactory means of making the fishponds entirely and 

 permanently harmless is to fill up the marine fishponds and to drain 

 thoroughly " and cultivate the whole brackish water area north of 

 Batavia. 



