Public domain
Untitled photo, possibly related to: The Insectology Department at Iowa State is doing work on corn parasites. The two examples shown are, on the left: Cynaeus angustus. These insects feed on the whole grain. On the right: Tribolium castaneum, generally known as the red rust flour beetle. These feed
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineUntitled photo, possibly related to: The Insectology Department at Iowa State is doing work on corn parasites. The two examples shown are, on the left: Cynaeus angustus. These insects feed on the whol. 1935-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.