Driven by curiosity and determination, scientists often spend their lifetime dedicated to research and writing about their discoveries in a specific scientific area of interest. Through numerous iterations of analyses and revision, this process can yield the synthesis of a hypothesis or natural law, described and published for posterity. This book by Lloyd V. Knutson, an American retired United...

the following three procedures have been used to determine the sex ratio of s.sphegea. the fly is one of the two iranian species of the genus sepedon which is fairly dominant in the focus area of schistosomiasis in khuzestan (south of iran) and by far abundant in the provinces of gilan and mazandaran, north of the country. a) collection of adults in late summer of 1975, about 200 adults s.spheg...

the biology of immature stages of s.sphegea and different techniques for their laboratory rearing has been studied during the past five years (1972-77). this fly is one of the 18 iranian species of snail-killing flies which is dominant in the focus area of schistosomiasis (khuzestan province) in the south-west of iran. the following procedures improved appreciably our laboratory rearin-technics...