ENTOMOLOGY

· SANITARY ENTOMOLOGYand Brues (1912) conducted experiments with this fly and reported successfulinoculations of six monkeys by bites of the flies. Anderson andFrost (1912) repeated these experiments and as a result three monkeysexposed daily to the bites ·of seyeral hundred Stomoxys, which at thesame time were allowed daily to bite two intracerebrally inoculated monkeys,developed quite typical symptoms of poliomyelitis eight, seven, andnine days, respectively, from the date of their first exposure. Autopsyof all proved the presence of typical poliomyelitis lesions. On the otherhand these same authors in further experiments (1913) and Sawyer andHerms (1913) record negative results with this fly. Fuller (1913) reportsthat it has been shown that epidemics of infantile paralysis usuallyoccur with an abundance of the stable fly.PELLAGRA, a disease of unknown origin, introduced from Europeto America, was for a long time thought to be caused by eating spoiledcorn. At present sentiment seems to favor considering that it is causedby lack of vitamines. However, it is important that we discuss in thislecture rather briefly the theories propounded regarding bloodsuckingflies as possible transmitters of the disease.Sambon (1910) brought forward the theory that the disease is carriedby the buffalo gnats Simulium spp. Jennings and King (1913b)and Jennings (1914) are inclined to believe that the incidence of thisgenus and of pellagra affords sufficient evidence to exclude Simulium fromthe consideration. On the other hand Jennings and King in their threepapers point out very strongly the possibility of Stomoxys calcitranabeing concerned in the transmission of the disease.RICKETTSIA MELOPHAGI Noller, a body similar to those foundin typhus, trench fever, etc., is found in the bodies of Melophagus ovinus,the sheep tick, but is not known to be associated with any disease.ANIMAL ORGANISMS TRANSMITTED BY BLOODSUCKING FLIESProtozoaMastigophora: Binucleata: HaemoproteidaeHaemoproteus columbae Celli and San Felice, the cause of PIGEONMALARIA or haemoproteasis of Columba livia, is transmitted by thepigeon flies Lynchia maura Bigot in Algeria and India, and L. brwneaOlivier in Brazil. Mrs. Adie (1915) worked out the complete life cyclein the fly, and Acton and Knowles (1914) in the pigeon. Mrs. Adiesucceeded in transmitting the disease to uninfected pigeons by the bitesof Lynchia flies. The flies used were dissected and found to contain