Otto Michael (1859 - 1934) was a German explorer, zoologist and entomologist. He made three expeditions to the Amazon, 1885-1888 (until 1887 accompanied by Paul Hahnel ), 1889–1893 and 1894-1921, collecting mainly Lepidoptera for the dealership Otto Staudinger and Andreas Bang-Haas.
I read his book since my mother tongue is German and after two or three pages you get quickly used to the German old font. His writing style is not the very best but still his stories are very exciting. Most impressive was that he was complaining about logging and fire clearing of forest especially around Santarem, where he said it was difficult to find species that Dr. Staudinger had found before him. He also described his meeting with an orchid collector, what a wonderful hobby that must have been and apparently more difficult than collecting butterflies since you have to keep the orchids alive and grow them. When I am back in Germany I will have a look at the book again and collect the names of all the species he mentions for everyone and post them, I can then translate the story of species that someone is especially interested in.
From 1925 to 1933 he published 16 papers on butterflies of the genus AGRIAS in the "Entomologische Zeitschrift". He named countless new forms with infrasubspecific names (as did LE MOULT). Here are 3 illustrations of Agrias he had painted himself.