As early as 1912, mosquitoes were observed bearing the pollen masses (pollinia) of the blunt-leaf orchid, Habenaria obtusata (Pursh) Richardson, in Reese's Bog, a cedar swamp at the north end of Burt Lake, Cheboygan County, Michigan, near the campus of the University of Michigan Biological Station (Dexter 1913).
Voss, Edward G. and Riefner, Richard E. Jr.
"A Pyralid Moth (Lepidoptera) as Pollinator of Blunt-Leaf Orchid,"
The Great Lakes Entomologist: Vol. 16
, Article 4.
Available at: http://scholar.valpo.edu/tgle/vol16/iss2/4