An interesting case of infection with this larvæ was brought to my observation in May, 1906, by Dr. George E. Lyon, Toledo, Ill. With the assistance of Mr. N. C. Gilbert of the University of Wisconsin, a practical zoologist, the identification was made and a search through literature revealed but seventeen cases heretofore reported, as follows: Five in America, five in Germany, and the remainder scattered throughout France, England, Sweden and the Argentine Republic, a rather wide range of territory.
Anthomyia canalicularis is the larva of the very small black house fly so often seen on windows. The flies, which are often found parasitic in man, lay eggs on decaying vegetables, the larvæ varying in size from ⅛ to ¼ inches in length. The body proper is long and narrow, has developed lateral branchii or gills, and is divided into segments, ten or fourteen, according to age. They are beset