Abstract
There are several controversial questions in the literature pertaining to the life history of the milkweed beetle, Tetraopes tetrophthalmus. I made an attempt to find the solution to some of these questions during the fall of 1939 and spring and summer of 1940. The results of this study are offered herewith. The milkweed hosts of this insect were abundant along railroads near Urbana, and it was largely in such situations that these investigations were carried out.