99] LEPIDOPTEROUS LARVAE— FR ACKER 99 



first ocellus (Fig. 86). Body cylindrical, bearing verrucae but no secon- 

 dary setae except on prolegs. Prothorax with a large shield on which the 

 dorsal verrucae are united; mesothorax bearing four verrucae on each 

 side in a transverse row. Abdomen with the verrucae of the Beta, 

 Rho, and Kappa groups present on the first nine segments; in addition 

 segments 1, 2, 3, and 7 have mu and Pi in the form of small verrucae, 

 and sigma a single seta; segments 4, 5, and 6 (Fig. 60) possess mu, 

 but the setae of the Pi group are scattered over the proleg and united 

 with sigma; on segments 8 and 9 mu is wanting but Pi is present. 

 Prolegs are present on segments 4, 5, 6, and 10, only; crochets always 

 biordinal, in a mesoseries. 



The various species differ in the development of the verrucae, the 

 positions of the ocelli, and the coloration. Owing to lack of material 

 it is not possible to diagnose genera at the present time, especially as the 

 differences which do exist overlap generic limits. The ocellar groups of 

 two species are shown in Figs. 86 and 87. 



