149 



a group of micro-organisms which primarily inhabit the alimentary 

 canal of insects and other Arthropods. Some of these live saprophytic- 

 ally in the mid gut, whilst others, such as R. prowazeki, invade the 

 tissues of their host. In the absence of an intermediate vertebrate 

 host infection is probably transmitted by the presence of the organism 

 in the excreta of the insect. 



Keilin (D). Supplementary Account of the Dipterous Larvae feeding 

 upon Molluscs. — Parasitology, Cambridge, xiii, no. 2, June 1921, 

 l)p. 180-183. 



In this collection of Dipterous larvae known to feed on molluscs, 

 the species recorded are: Melinda cognata, Meig. [R.A.E., B, viii, 

 24] ; Sarcophaga fdia, Pandelle ; 5. melantira, Meig. ; Engyzops 

 pecchiolii, Rond. ; Chrysomyia {Lucilia) dux, Esch. ; and Sciomyza diihia, 

 Fin. Individuals previously recorded by the author as Phora sp., 

 have now been identified as Phora notata, Zett., by Lundbeck, who has 

 also proved that the species described by the present author as Phora 

 hcrgenstammi, Mik., is P. (7o;;u's/;'m, Wood (1906). These two species 

 are distinct and the differences are here noted. 



XuTTALL (G. H. F.) & Keilin (D.). On the Nephrocytes of Pcdicuhis 

 hmnanus. — Parasitologv, Cambridge, xiii, no. 2, June 1921, pp. 

 184-192, 5 figs. 



The hitherto unknown function of the two groups of special cells- 

 occurring in the thorax of Pedicithis hmnanus has been determined 

 as excretory-accumulatory and they are here referred to as nephrocytes. 

 The observations described confirm those of previous authors with 

 regard to the structure of these cells. Similar cells occur also in Mal- 

 lophaga and have been wrongly described by some authors as salivary 

 glands. 



Rapport van de Plaatselijken Gezondheidsdienst te Soerabaja over hefc 

 Jaar 1917. [Report of the Public Health Service at Soerabaya 

 in 1917.] — Meded. Burg. Geneesk. Dienst Ned.- Indie, Batavia, 

 ix, 1920, pp. 2-77, 8 plates, 9 maps, 4 charts, 9 appendices. (Also 

 in English.) [Received 7th July 1921.] 



The data relating to the incidence of malaria and the occurrence of 

 Anopheline mosquitos in the Dutch East Indies have already been 

 noticed from other papers. 



Franc^.a (C). Observations sur le Genre Phkbotonius. II. Phlebo- 

 tomes du Nouveau Monde.— 5;<//. Soc. Poring. Sci. Nat., Lisbon, 

 viii, pt. 3, 1920, pp. 215-236, 4 figs. [Received 7th July 1921.] 



As a result of the author's paper on the European and North African 

 species of Phlebotomus [R.A.E., B, viii, 20] it was suggested that he 

 should undertake the study of the American species. The present 

 paper deals with the following species ; P. longipalpis, Lutz cS: Neiva ; 

 P. intermedius, Lutz & Neiva, and P. squamiventris, Lutz & Neiva, 

 from Brazil ; and P. migonei, sp. n., from Paraguay. 



