124 



In both cases the successive stages of the evolution of these granulations 

 have been traced, and as a result of their quantitative and qualitative 

 development it is thought probable that they play a definite part in 

 the developmental activity of the leucocytes. 



Larrousse (F.). Etude systematique et medicale des Phl^botomes. — 



Paris, Vigot Freres, 1921, 106 pp., 20 figs. 



Many scattered papers on the biology, classification and pathogenic 

 role of Phlehotomus spp. have been published. The author's aim is 

 to present a fairly complete survey of the knowledge now available 

 on these Psj'chodids without attempting to deal exhaustively with 

 this vast subject. 



The first chapter deals with the anatomy and biology of the genus, 

 and includes Skuse's key to the families of Nematocera. Notes on 

 the preparation of specimens are given. The parasites found in 

 Phlebotonms are mentioned and briefly discussed. 



The second chapter deals with the various species, giving the dis- 

 tinctive characters and habitat. They are divided into European, 

 African, Asiatic and American groups (no Australian species being 

 as yet known) with a specific key for each group. 



The third chapter concerns the part played by these flies as disease- 

 carriers. Three-day fever has been proved to be transmitted by them ; 

 their role is not yet definitely established as regards Oriental sore, 

 American leishmaniasis or verruga in Peru. 



The author refers to the difficulty in systematic study caused by 

 varying methods of description and to the difficulties of identifying 

 the females [R.A.E., B, ix, 22]. Doubtful points in the biology of 

 these flies can only be settled by breeding. 



IyencxAr (M. O. T.). Preliminary Report of a Malaria Survey o£ 

 Calcutta and Environs. — Ind. Jl. Med. Res., Calcutta, Spec. 

 Ind. Sci. Congress no., 1920, pp. 8-17. [Received 30th May 1921 .] 



The mosquitos recorded from Calcutta during a two years' survey 

 are Anopheles stibpictus,GrsiSsi {rossi, Giles), A. barbirosfris, Wulp, .4. 

 hyrcaniis, Pall, [sinensis, Wied.), A.jamesi, Theo., A. fuliginosus, Giles, 

 A . minimus, Theo., var aconitiis, Don. [listoni, List., var. alboapicalis, 

 Theo.), A. stephensi. List., Desvoidya oUiirbans, Wlk., Stegomyia 

 fasciata, F., S. scutellaris, Wlk., Mimomyia cJiamberlaini, Ludl. 

 {Radiocnlex clavipalpHS , Theo.), Culex {Leucomyia) gelidns, Theo., Culex 

 impellens, Wlk., C. fatignns, Wied., C. concolor, R. — D., Mansonioides 

 annulifera, Theo., Aedomyia squamipennis, Arr., Ficalbia minima, 

 Theo. {Mimomyia minuta, Theo.), and a species not yet identified. 



During January and February the numbers of Cnlex fatigans and 

 C. impellens increase suddenly in the central part of Calcutta and 

 in the southern and eastern suburbs, about the time of the easterly 

 winds from the Salt Lakes. Anopheles minimus var. aconitus generally 

 breeds in ponds, but may also be found in roadside drains in which 

 the rainwater collects during the monsoons. A. stephensi is very 

 prevalent in the densely populated areas of the town and probably 

 gives rise to a considerable amount of malaria. It can breed in rain 

 water in old tins on house terraces. The presence of silt in the water 

 does not prevent its breeding. 



Cidex concolor was found associated with A. stephensi and is 

 destructive to all other mosquito larvae. Desvoidya obtiirbans is also a 

 predaceous species, feeding on larvae of Culex gelidns and A. snbpictus. 

 It is also a cannibal and will breed in stagnant water. 



