Eggs are shown a little larger than natm-al at c of figure 1 , and 

 much magnified at a and h of fig. 2, c showing the sculpture. 



The larva. — ^The larva is a soft, whitish, grub-like caterpillar of 

 nearly cylindrical form, with a small, dark head and a few very 

 sparse hairs on each segment. . Larv?e in the earlier stages of growth 

 are illustrated by d, e, and /, of fig. 2. A full-grown larva is shown 

 in profile within an open stem at fig. 1, d, and the head and first two 

 thoracic segments appear in fig. 2 at g. Mature larvse measure 

 about an inch (25 mm.). In the District of Columbia full-grown 

 larvse, as already observed, occur as early as June IG ; in New Jersey 

 late in July, and are to be found upon the vines in different stages 

 in October; at Washington as lat^e as the second week of November. 

 After attaining maturity the larvse desert the stems and enter the 

 earth, burying themselves to the depth of one or two inches, and 



form their cocoons in which 

 they transform to pupa. 

 The cocoon (shown at /, 

 fig. 1) is constructed of silk 

 and coated externally with 

 fine particles of earth which 

 adhere by means of some 

 gummy secretion of the 

 larva. 



The pupa or chrysalis 



(shown in profile at e, fig. 1) 

 FiG.2.-itfetif((,T.safyrD,i/m-Hu-.x;a,eggasseeiifromabove; about ^ inch in 



b, same from the side showing sculpture; e, sculpture of measui es aOOUt s mcn m 

 egg greatly enlarged ; (?, newly-hatched larva ; e, half- length (16 mm.). It is shin- 

 grown larva : /, head of same from side ; g, head of ma- . , , . 



turelarvafr;mabove;a,?.,andd,muchenlarged;.,/,ing mahogany brown m 

 and y, less enlarged. (Author's illustration). color and its head is Orna- 



mented in front just above and between the eyes with a horn-like 

 process. By means of this the pupa cuts its way out of one end of 

 its cocoon and by the aid of the abdominal hook-like spines forces 

 itself to the surface of the earth before transforming to imago. 



Number of generations.— T\\e question of the number of genera- 

 tions produced annually in the different temperature localities which 

 this insect inhabits has been solved by recent observation, the results 

 serving to indicate that it is practically single-brooded on Long 

 Island and northward ; that there is a tendency to two broods in New 

 Jersey, the moths in exceptional cases completing their transforma- 

 tions late in August or September; that in the latitude of the Dis- 

 trict of Columbia the species is partially double-brooded, a larger 

 portion of the moths, we may assume, developing as a second gene- 

 ration here than in New Jersey; and that in the Gulf States this 

 species is undoubtedly fully two-brooded. 



