Henri Louis Frédéric de Saussure
Henri Louis Frédéric de Saussure ( ; ; 27 November 1829 – 20 February 1905 ) was a Swiss mineralogist and entomologist specialising in studies of Hymenoptera and Orthoptera . 
<triplet> Henri Louis Frédéric de Saussure <subj> 27 November 1829 <obj> date of birth <subj> 20 February 1905 <obj> date of death <subj> entomologist <obj> field of work