218 



Alston (A. M.). The Life History and Habits of two Parasites 

 of Blowflies.— Proc. Zool. Soc, London, 1920, part 3, September 

 1920, pp. 195-243, 20 figs. 



This paper, which has an introduction by Prof. Maxwell Lefroy, 

 deals with Alysia tnanducator, Panz., and Nasonia brevicornis, Ashm. 

 The technique employed during the investigations is described, and 

 a full account of the life- histories and habits of these parasites is given. 



Alysia manducator is the more important parasite of blow-flies. 

 The life-cycle of this Braconid varies from 33 days and upwards, 

 with a mean average of 52 days. The eggs are deposited singly in 

 the larva of the blow- fly. Hibernation occurs in the larval stage. 

 This species has been successfully bred from Lucilia sericata, Meig., 

 L. caesar, L., Phormia aziirea, Fall, {groenlandica, Ztt.), Calliphora 

 erythrocephala, Meig., and C. vomitoria, L., 



Nasonia brevicornis, Ashm., is primarily a. parasite of the common 

 house-fly, Musca domestica, but has also been bred from the species 

 mentioned above. It may also accidentally become a secondary 

 parasite of A. manducator, when the puparia containing the latter are 

 within its limited reach. The length of life-cycle is entirely dependent 

 upon the temperature, and ranges from 11 to 22 1 days. Eggs are laid 

 in the puparium of the host, and as many as 62 parasites have emerged 

 from one host in captivity. Hibernation occurs in the larval stage 

 within the host, and the adults emerge in the spring. The earliest 

 record of emergence in England is the end of April. 



Robinson (L. E.). Malformations in Ticks. — Parasitology, Cambridge, 

 xii, no. 3, September 1920, pp. 175-179, 5 figs. 



The abnormalities found in the ticks, Dermacentor atrosignatus,^ 

 Neum., Amblyomma hebraeum, Koch, A. cajennense, F., and Hyalomma 

 aegyptium, L., here recorded, are probably due to mutilation during 

 the course of the preceding nymphal phase. 



SWELLENGREBEL (N. H.) & SwELLENGREBEL DE GrAAF (J. M. H.). 



A Malaria Survey in the Malay Archipelago. — Parasitology, 

 Cambridge, xii, no. 3, September 1920, pp. 180-198. 



Previous work dealing with the distribution of Anophelines in the 

 Malay Archipelago is reviewed. The bulk of the information regarding 

 the larval habitats and the advisability of remedial measures has. 

 been noticed elsewhere [R.A.E., B, viii, 53, etc.]. 



Peacock (A. D.). The Anopheline Waters of Southern Flanders, 

 being a Report on the Area occupied by the British Second 

 Army in France. — Paras itologi/, Cambridge, xii, no. 3, September 

 1920, pp. 234-252, 1 map, Ifig. 



A survey was carried out during the summers of 1915 and 1916 

 and during September 1918 to ascertain the Anopheline conditions- 

 in the area occupied by the British Army, and the probabilities of 

 the spread of malaria among troops in Southern Flanders are 

 considered. The technique employed during these investigations. 



