The Coccidæ herein descirbed were collected by Professor L. Bruner in 1867 and 1898. I examined the collection with more than ordinary interest, as practically nothing was known of the Coccidæ of the Argentine or Paraguay. The flora of the southern part of South America resembles in many respects that of the arid region of North America, and it was therefore not wholly unexpected that this resemblance should extend to the Coccidæ. The collection is too small to show how far such a resemblance may extend, but the species of Orthezia and Lichtensia, at least, are entirely representative of North American types.