n6 Mosquitoes 



ellipsoidal wild yeast was then isolated from an old 

 banana, and insects were subsequently fed on the 

 fermenting fruit, to which the yeast, in pure culture, 

 had been added. As a result, bodies identical in 

 appearance with the fusiform stage of the so-called 

 Myxococcidium stegomyice were found in nearly fifty 

 insects that had never been in contact with a case of 

 yellow fever. There were obtained, in one instance, 

 as the result of feeding a male insect on wild yeast and 

 banana, sections which show these organisms among 

 the muscular tissues of the thorax, many of them 

 lying in close proximity to the salivary glands. This 

 organism appeared to be not a protozoan, as classed 

 by Parker, Beyer, and Porthier, but a wild yeast. 



Just here I may be permitted to remark that the 

 mosquitoes and eggs furnished to Dr. Carroll by Dr. 

 Howard were reared in the laboratory at Baton 

 Rouge, where the fungi had already been observed in 

 non-infected Stegomyias fed on rotten fruit, a fact 

 that Dr. Carroll does not fail to mention. Whether 

 these bodies belong to the vegetable or to the animal 

 kingdom, the fact remains that they were found in 

 the mosquito's esophageal diverticula, the thoracic 

 muscles, and also in the salivary glands, from which 

 they may be injected along with the saliva while the 

 insect is feeding. According to Dr. Carroll, the re- 

 searches of Robinovitch show that the ellipsoidal wild 

 yeast may be pathogenic for the lower animals. 

 Similar forms have been isolated from the broken- 

 down nodules of spurious glanders. Among the 

 multitudes of blastomycetes so universally dissemi- 

 nated in nature, it would not be a matter of great 



