Your caption under the photo of testy entomologist Harrison Dyar that accompanies the review of Marc Epstein's biography (Nature 529, 152–153; 2016) credits Dyar with having collected “500,000 different kinds of mosquitoes over his career”. Given that there are still only about 3,000 species of mosquito known worldwide today, this seems a bit of a stretch.

Dyar may have collected 500,000 specimens, but not 500,000 different kinds.