DESCRIPTION OF PLATES 
Plate XXXIX. Injury caused by potato weevils. Fig. i.—A section of a potato 
from Peru, showing the larva of Rhigopsidius tucumcmus in its 
burrow. 
Fig. 2.—A section of a potato, showing the burro wings of Rhigop¬ 
sidius tucumanus. The work of the two other weevils is some¬ 
what similar. 
XL. Rhigopsidius tucumanus Heller. Fig. i.—Dorsal view. 
Fig. 2.—Ventral view. Both views are much enlarged; natural 
size, 9 mm. 
XLI. Figs, i and 2 .—Premnotrypes solani Pierce (much enlarged; natural 
size, 7 mm.). 
Fig. 1.—Dorsal view. In this drawing the beak, scape, and tibiae 
are foreshortened, which gives an idea of even greater differences 
from the succeeding species than really exist. 
Fig. 2.—Ventral view. 
Fig. 3 .—Trypopremnon latithorax Pierce (much enlarged; natural 
size, 6 mm.). Dorsal view. In this drawing the scape and the 
tibiae are not foreshortened as much as in the other species. The 
different attitude of the beak gives a sense of greater divergence 
than occurs, as can be seen from the side view of the head and 
prothorax (see text figs. 1 and 3). The ventral view resembles 
very closely that of Premnotrypes solani. 
The drawings which accompany this article were made by Mr. Harry B. Bradford. 
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