38 



The Bulletin. 



and in practice it is not necessary to do so. As a general rule, how- 

 ever, the larvae of the True Bud Worm are lighter in color than the 

 larvae of the False Bud Worm. They are also much less heavily 

 marked and very seldom have conspicuous reddish marks. 



The larvae of the False Bud Worm (Figs. 23, b and c, and 24) vary 

 greatly in color — from examples that are light green in color and 

 scarcely distinguishable from the True Bud Worm to examples that are 



Fig. 23.— False Bud Worm of Tobacco, (a) Adult; 

 (b and c) larva; (d) pupa. 



(After Howard, Bureau of Entomology, U. S. Depart- 

 ment of Agriculture.) 



brownish or reddish in color. Forms are also found that are scarcely 

 marked at all, whereas others are heavily marked by darker longitudi- 

 nal lines. The larva of the False 

 Bud Worm measures from an inch 

 and a half to two inches in length. 

 The Pupae. — The pupa? of both 

 Bud Worms are dark mahogany 

 brown in color and resemble in a 

 general way the pupoe of Cut- 

 worms. The pupa of the True 

 Tobacco ' Bud Worm measures 

 about % inch in length. The pupa 

 of the False Bud Worm (Fig. 23d) 

 measures about % of an inch in 

 length. 



Fig. 24.— Larva of the False Bud Worm of 



Tobacco, natural size. 



(Photograph by the author.) 



