Dr. Neal Smith Traces on a Map the Limited Distribution of the Day-flying Moth, by Hofmeister, Richard K, 1981, Smithsonian Archives - History Div, Dr. Neal Smith traces on a map the limited distribution of the beautiful day-flying moth. Smith, a biologist at the Smithsonian Tropical Research Institute in Panama, spent 17 years of research to unravel the mystery of an unusual moth migration which takes place annually throughout Central and South America..