DISEASES TRANSMITTED BY MOSQUITOES 249 



and Clark, using Ctdex pipiens Linnaeus, C. sollicitans Walker and C. 

 cantator Coquillett. 



PLANT ORGANISMS TRANSMITTED BY MOSaUITOES 



Thallophyta: Fvmgi 



Myxococcidivm stegomyiae Parker, Beyer and Pothier (1903) is a 

 yeast normal to the mosquito Aedes argenteus (Stegomyia calopus 

 Meigen). It was thought by its describers to be the causative organism 

 of yellow fever, but this was disproven by the work of subsequent authors 

 (Castellani and Chalmers, p. 1005). 



Thallophyta: Fungi: Schizomycetes: Bacteriaceae 



Bacterium anthracis Davaine, cause of ANTHRAX, was experimented 

 upon with mosquitoes by Morris. Psorophora sayi (Dyar and Knab) and 

 Aedes sylvestris (Theobald) Dyar and Knab commonly bite livestock in 

 Louisiana and are very annoying. Out of 86 tests with these mosquitoes, 

 feeding them on guinea pigs for different periods and at different times, 

 from three hours before death to ten minutes after death, Morris obtained 

 infection by the bite of the mosquito in 40 per cent of his tests. 



ANIMAL ORGANISMS TRANSMITTED BY MOSQUITOES 



Protozoa 

 Mastigophora: Bmucleata: Haemoproteidae 



Haemoproteus danilewskyi (Grassi and Feletti 1890), cause of an 

 AVIAN ANEMIA, passes its cycle of schizogony or asexual multiplica- 

 tion in sparrows, larks, ravens, and birds of prey, and its cycle of spor- 

 ogony or sexual multiplication in a species of Culex. It occurs in Europe, 

 Africa, India, and America. 



Haemoproteus nocttiae Celli and San Felice (1901), cause of an 

 AVIAN ANEMIA, passes its cycle of schizogony in the owls, Glaucidimn 

 nocttuie, Strix flammea, and Scops gin, and its cycle of sporogony in 

 Culex pipiens Linnaeus. Castellani and Chalmers (p. 295) give a detailed 

 description of the life cycle as presented by Schaudinn, but in view of 

 the fact that there is a belief that Schaudinn has confused this species 

 with a Trypanosoma we will omit discussion. It is supposed to occur in 

 Europe, North Africa, and America. 



Haemoproteus syrnii Mauer (1910), cause of an AVIAN ANEMIA, 

 passes its cycle of schizogony in the wood owl, Syrnium aluco, and its 

 sporogony in the mosquito, Cvliseta annvlata Schrank (Theobaldia). 



