Lloyd Vernon KnutsonLloyd Vernon Knutson is an Emeritus of the US Department of Agriculture's Systematic Entomology Laboratory and the current Cooperating Entomologist at Centro Nazionale per lo Studio a la Consevazione della Biodiversita Forestale, Verona, Italy. He ha studied the Sciomyzidae for over 40 years and has published over 90 papers on various aspects of their biology. Read More Read Less