II 



structure ami physiology, their relation to man or domestic animals r 

 their food, method ami time of feeding, as well as their life-histroy ; 

 at the present time, however, he has little to state, except concerning 

 the systematic study of Tabanidae. 



Most of the blood-sucking insects of our Tslands belong to the 

 same Families as those found in the Paraearctic and Oriental regions, 

 but some of them might be confined to the our Islands, such as the 

 genus Isshikia (n. g.) of Tabanidae. 



In the present work, attempt has been made to provide technical 

 descriptions in detail of species of Tabanidae only, as many students 

 might often confuse two or more species, as all the species are not 

 well known among the students of medicine, or even entomologists. 

 The terminology used in this paper is probably incorrect from a mor- 

 phological point of view, but the terms mostly used by Verrall, are 

 retained to avoid contusion. 



The author is pleased to have this opportunity of expressing 

 his sincere thanks to those who with unfailing courtesy, have helped 

 him for several years by sending specimens. His acknowledgements 

 in this direction are due particularly to professor Dr. S. Matsumura 

 (Rigaku-hakushi), Dr. S. Isshiki, Mr. T. Okuni, Mr. M. Maki, Mr. T. 

 Oshima, and Mr. S. Inamura. The author is well aware of the amount 

 of time and trouble which these gentlemen must have expended on his 

 behalf. Mr. J. Sonan, and Mr. T. Okuni have also helped htm in the 

 preparation of specimens and in coloured drawings respectively. His 

 most cordial thanks are due to Hon. Dr. M. Takada, director of the 

 Agricultural Experiment Station of the Formosan Government, and 

 Dr. S. Suzuki, acting director of the Station, for their kindness in 

 publishing this paper. The author must also render grateful thanks to 

 Dr. C. J. Gahan, Keeper of the Entomological Department of the 

 British Museum (Natural History), London, for giving him free access 

 to the collections. November 5th, 1918. 



