72 ILLINOIS BIOLOGICAL MONOGRAPHS [72 



moniliform, sometimes depressed in early but rarely in later instars. 

 Setae of thorax and abdomen as in Figs. 39 to 42 except as noted for 

 particular genera ; rho directly cephalad of spiracle on segment 8 except 

 in a few rare cases. Spiracles broad-elliptical in outline, somewhat 

 larger and farther dorsad on eighth than on preceding segments. Pro- 

 legs always present on segments 3, 4, 5, 6, and 10, first four pairs each 

 bearing a complete circle of uniordinal or biordinal crochets. 



It will be noted that the subfamily Olethreutinae (Grapholithinae) 

 is not accepted here, as no larval characters were found to justify it. 

 The genera included under this name probably do not form a natural 

 group. The other two subfamilies may be distinguished as follows : 



a. Abdomen with kappa and eta in a horizontal line or nearly so; seg- 

 ment 7 with Pi group unisetose ; prothorax with delta close to and 

 ventrocephalad of beta ; crochets uniordinal, sessile, poorly devel- 

 oped. Phaloniinae 



aa. Abdomen with kappa and eta in a diagonal or vertical line ; segment 

 7 with Pi group at least bisetose ; prothorax with delta ventrad or 

 ventrocaudad of beta, sometimes distant. Tortricinae 



Genera of Tortricinae : 



a. Segment 9 with alpha close to rho and usually situated on the same 

 pinaeulum with it, not associated with beta (Fig. 42). 

 b. Mu absent on segment 9 (as in Fig. 56) ; setae located on black and 

 heavily chitinized pinacula ; crochets uniordinal. Sciaphila 



bb. Mu present on segment 9, usually associated with kappa and eta. 

 c. Adfrontals extending all the way and front about two-thirds of 

 the way to the vertical triangle, 

 d. Arms of epicranial suture concave in dorsal third, meeting in 

 an attenuate point, 

 e. First abdominal segment with kappa and eta in a diagonal 

 line; seventh, in a horizontal line (as in Fig. 45). 



Thiodia 



ee. First abdominal segment with kappa and eta in a nearly 



vertical line (as in Fig. 41) ; seventh, in a diagonal line. 



f. Mu on segment 9 located on the same pinaeulum with 



kappa and eta (as in Fig. 46). Tmetocera 



(In part) Exartema 



ff. Mu usually not located on the same pinaeulum with kappa 



and eta (Fig. 42). Cydia 



dd. Arms of epicranial suture straight in dorsal third, meeting 



in a regularly narrowed point. Eucosma 



