12 BULLETIN 427, U. S. DEPARTMENT OF AGRICULTURE. 
THE MOTH. 
The moth (figs. 10, 11, 12) is small, having a wing expanse of a 
little more than a half inch (12 to 16 millimeters). The general color 
is gray. The f orewings bear on the outer half a fringe of light gray as 
wide at the base as the width of the wing. The surface is more or 
less spotted and mottled with black and ocher. The hind-wings are 
much shorter and narrower and have a still stronger fringe of buff. 
Fig. 9.— Cocoons of tuber moth on exterior of potato, showing method of grouping many cocoons 
closely under black excrementitious webbing. (Original.) 
The antennae are long and slender and the palpi are comparatively 
long and conspicuous. The abdomen is also slender. 
The following description is a translation of Zeller (5) : 
The male bears on the upper side of the anal segment a large oval disk, from each side 
of which protrudes a readily perceptible tuft of crumpled hair. The somewhat lighter 
female — if it is the female — has somewhat wider fore-wings, and the dot on the cross- 
vein and the one before it darker in color, the one toward the inner margin distinctly 
lighter. 
