Handbook of medical entomology . In the forms which have been best studied the larval life is a long one, lasting for months or even for more than a year. Until recently, little was known concerning the life-histories of this group, but the studies of Hart (1895), and Hine (1903 + ) have added greatly to the knowledge con-cerning North American forms. Many of the species attack man with axad- ity and are able to inflict painful bites, which may smart for hours. In some instances the wound is so considerable that blood wnW continue to flow after the fly has left. We have seen several cases of s
Handbook of medical entomology . In the forms which have been best studied the larval life is a long one, lasting for months or even for more than a year. Until recently, little was known concerning the life-histories of this group, but the studies of Hart (1895), and Hine (1903 + ) have added greatly to the knowledge con-cerning North American forms. Many of the species attack man with axad- ity and are able to inflict painful bites, which may smart for hours. In some instances the wound is so considerable that blood wnW continue to flow after the fly has left. We have seen several cases of secondary infection following such bites. The horse-flies have been definitely convicted of transferring the trypanosome of surra from diseased to healthy animalsand there is good evidence that they transfer anthrax. The possi-bility of their being important agents in the conveyal of humandiseases should not be overlooked. Indeed, Leiper has recentlydetermined that a species of Chrysops transfers the blood parasiteFilaria
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1915
