16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 60. 



vertex of head ; head pale grayish yellow, darkened across face be- 

 tween eyes; eyespots black. 



Stage IV (both sexes).— Body length, 5.5-9 mm. ; head, 1 mm. high 

 by 0.8 mm. wide. Color: Body pale green; alimentary canal leaf 

 green; spines blackish on head and body; head pale tan darkened 

 across face between eyes ; eye spots black. 



iStage V (ultimate male from leaves). — Body length, 7-11 mm.; 

 head, 1.2 mm. high by 1 mm. wide. Color: Body while feeding 

 greenish; later, when feeding is completed and alimentarj'' canal is 

 emptied, leaden white; spines, head, and body whitish; head with 

 brownish freckles ; frons pale brownish ; mouth parts brownish ; eye 

 spots black. 



(Ultimate male from cocoon). — Body length, 5.5-6.5 mm. Color: 

 Same as larva above with emptied alimentary tract. 



Stage V (preultimate female). — Body length, 8-10.5 mm.; head, 

 1.3 mm. high by 1.1 mm. wide. Color: Body greenish white; head 

 tan. 



Stage VI (ultimate female from leaves). — Body length, 11-14 

 mm.; head, 1.5 mm. high by 1.3 mm. wide. Color: Body greenish 

 white while feeding; later, when finished feeding and alimentary 

 canal is emptied, leaden white. 



(Ultimate female from cocoon just spun). — Body length, 12-13 

 mm. Color: Same as larva above with emptied alimentary tract. 



The following table (Table I) records, stage by stage, the change 

 in size of a series of isolated larvae: 



