206 



Of eighteen species of Culicines tested, none showed a trace of 

 development of anv human Plasmodium. On the other hand, seven 

 transmit P. danileivskyi to birds ; ten have been found to transmit 

 Filaria hancrofti, though neither Acanthocheilonerna {¥.) perstans nor 

 F. juncea show any development in mosquitos. Dirofilaria immifis 

 of the dog can complete development in two species of mosquitos. 

 Stegomyia fasciata is the only mosquito known to transmit yellow 

 fever. Dengue fever is transmitted by four species of Culicines. Two 

 Culicines of the genus Janthinosoma carry the eggs of Dermatobia 

 hominis {cyaniventris) and thus disseminate human and animal 

 myiasis. The mechanical transmission of human and animal 

 trypanosomes has also been obtained in the case of two species of 

 mosquitos. Further research will undoubtedly reveal an even greater 

 scope of pathogenicity of mosquitos both in animal and human 

 diseases. 



Fillers (A. W. N.). Scaly Leg in Fowls. — TV^. Record, London, 

 N.S., no. 42, 15th October 1921, pp. 827-829, 4 figs. 



Scaly leg in fowls due to the Sarcoptid mite, Cnemidocoptes mtttans, 

 is described and illustrated, and the usual remedial measures are 

 advocated [R.A.E., B, ii, 44]. 



Prompt Mosquito Control by use of the Top Minnow, Gamhusia. — 

 Public Health Repts., Washington, D.C., xxxvi, no. 36, 9th 

 September 1921, pp. 2220-2221. 



A case is recorded in which the numbers of Anopheline larvae 

 were greatly checked by the introduction of top minnows { Gamhusia 

 sp.) into a pond. 



Dyar (H. G.) . The Genus Haemagogv.s, Williston. (Diptera, Culieidae.) 



— Inseciitor Inscitiae Menstruus, Washington, D.C., ix, no. 7-9, 

 July-September 1921, pp. 101-114. 



In the genus Haemagogus the females of many species are practically 

 indistinguishable, whereas the male genitalia show marked characters. 

 Some of the older species cannot be recognised at present as they are 

 described from females, and no males are available from type localities. 



A key to the species, based on the male genitalia, is given, those 

 dealt with including Haemagogus {Stegoconops) pajiarchys, sp. n., 

 from Ecuador; H. {Haemagogus) iridicolor, sp. n., from Costa Rica ; 

 H. gladiator, sp. n., from Panama, in tree-holes ; H. chalcospilans, 

 sp. n., bred from larvae occurring in salt pools in Panama ; and 

 H. janthinomys, sp. n., bred from larvae in tree-holes in Trinidad. 



Dyar (H. G.). Illustrations of certain Mosquitoes. — Insecutor Inscitiae 

 Menstruus, Washington, D.C., ix, no. 7-9, July-September 1921, 

 114-118, 1 plate. 



The species dealt" with include : Culex {Helcoporpa) irifidus, sp. n., 

 from Costa Rica; C. (Ctdex) chidesteri, sp. n., from Panama; and 

 Uranotaenia orthodoxa, sp. n., from Costa Rica. 



