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 milhmeters). The general color 

 is gray. The f orewings bear on the outer half a fringe of hght gray as 

 wide at the base as the width of the wing. The sm-face 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 antennas 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. 



