208 A Classification of Lepidopterous Larvee. 



tubercle on the base of the leg (vil) is very weak, the hairs being 

 separated and obscure. The segments are divided into two annu- 

 lets, corresponding to the two posterior ones of the Tenthredinid*. 



Plodia interpunctella Hilbner. 



The setie are very fine and the tubercles minute; both have nearly 

 disappeared, except that the subventral ones bear distinct hairs. 

 The arrangement of tubercles is the same as above, though I cannot 

 positively distinguish more than one seta from tubercle v. Perhaps 

 the other has disappeared. 



Superfamily TORTRICINA. 

 Family Grapholithidae. 

 Carpocapsa pomonella Linuf«us. 



The setae are distinct and the tubercles are surrounded by corne- 

 ous areas. Tubercles iv and v arise from the same area, while the 

 setfe of vii, three in number, are without a corneous area. The 

 other tubercles are single, normal. 



Family Tortricidae. 

 CaccBcia cerasivorana Fitch. 



The tubercles are quite large, having apparently occupied most 

 of their surrounding corneous areas, and suggest to us the origin 

 of the warts of the Pterophoridffi, though the setae are not increased 

 in number. Tubercles iv and v are consolidated into a single wart. 

 The large prothoracic dorsal shield is very distinct. 



Lophoderus politana Haworth. 



The set£e are distinct, but the tubercles obscure. Tubercles iv 

 and V are not very closely consolidated. The arrangement is quite 

 normal. In all these larvae we note that the 9th and 10th segments 

 of the abdomen are separated by a well-marked division. 



Superfamily TINEINA. 



In this group we reach the highest degree of modification in the 

 line of abortion of tubercles, setae, and other normal body structures. 

 Here specialization has taken the course of degeneration. Since we 

 have at least four different lines of descent among the Generalized 

 frenulum conservers, I cannot arrange the families in a satisfactor}^ 



