460 SYNOPTIC COLLECTION. 



The young Tortrix testudimana has no prop-legs, while 

 the six thoracic legs are so small that they are difficult to 

 perceive and are of little use. No. 1167 is an adult 

 Tortricid, Cacoecia rosaceana. 



One of the best known families of moths is the Tinei- 

 dae, represented by the familiar clothes moth, Tinea pellio- 

 nella Linn., and by Coptodisca ( = Aspidisca) splendor if er- 

 ella Clem. 



Tinea pellionella Linn., produces at the north but one 

 generation in a year. Under normal conditions the eggs 

 are laid from May to August, but in furnace-heated houses 

 the moths are often seen in April, and sometimes as 

 early as March, so that the eggs in these cases are laid 

 earlier. In about a week the eggs hatch and the larvae 

 (PI. 1168, fig. i) begin to feed at once. They can live, 

 if necessary, upon almost any dry animal matter, but 

 since the earliest times they have preferred to infest our 

 houses and feed upon woolen goods, fur, feathers, and 

 even cotton cloth. The larvae do all the damage. As 

 soon as hatched, the larva makes a protective case for 

 itself from the material on which it feeds. This case 

 (fig. 2) it seldom leaves but as the animal grows larger 

 it increases the size of its protective covering by slitting 

 the edge and setting in gores. By turning about in its 

 case it is able to do this at each end. 



The larva reaches its full size toward winter; it then 

 finds a safe place where it fastens itself securely and in 

 its closed case remains torpid till spring. The moth 

 (No. 1169; PI. 1168, fig. 3) is dull-colored and expands 

 about one half inch. Its mouth parts are in such a ves- 

 tigial condition it cannot obtain food and after egg-laying 

 is completed it dies. 



Coptodisca ( = Aspidisca] splendoriferella Clem., when a 

 larva (PI. 1170, fig. i), lives in apple tree leaves, mining 

 the parenchyma between the two layers (fig. 2). In the 

 autumn it makes a case for itself from the layers of the 

 leaf and travels about (fig. 3), selecting a spot on the 



