454 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
The moth of Salebria semiobscurella (Hulst) is ash gray with a 
wing expanse of about 7g inch. The forewing is pale gray at the base, 
followed by_a blackish shade, and the outer two-thirds is powdery 
gray with obscure lines. The base of the inner margin is reddish. 
The full-grown larva is about % inch in length. The head is yellow- 
ish, flecked with brown, the body yellowish green with brick-red lines 
on the back and sides. The red lines are absent from the sides of 
some specimens. This species is a leaf roller on sumac, and is some- 
times very abundant in the Northeastern States. It ranges ie 
Maine to Texas. The moths emerge in June and July, the larva 
are found from July to September, and the winter is passed in the 
pupal stage. 
The lesser cornstalk borer (Zlasmopalpus lignosellus (Zell.) ) 
girdles the roots of black locust seedlings in forest nurseries in Arkan- 
sas, Louisiana, Mississippi, North Carolina, and Tennessee. The 
moths vary somewhat in color and size, the male being ochre yellow 
to light brown and the female generally darker. Their forewings 
are long and narrow and the expanse is from 5g to 1 inch. The full- 
erown larva is about 54 inch long. The head is brownish black, the 
cervical shield dark brown, and the body greenish white with rather 
conspicuous, somewhat broken, longitudinal stripes of dark brown. 
The species is well distributed through the Southern States and 
has been taken as far north as Massachusetts. It is also found in 
Mexico, Central America, and South America. A gall-like injury is 
formed on the lower stem of black locust in the nurseries, and the 
seedlings are killed or break off at the ground line (fig. 102). Injury 
is especially common in sandy soil recently in grass or weeds. In 
the Southern States where this injury occurs there may be from three 
to four generations a year. For control measures see pp. 33-34. 
The moth of Canarsia ulmiarrosorella (Clem.) is fuscous gray, with 
a wing expanse of 84 inch. The forewing is more or less dusted with 
white and is crossed by dark gray or blackish wavy lines. The full- 
grown larva is about 34 inch long, and bright green, with the margins 
of the segments faintly tinged with yellow and with pale dorsal ‘and 
stigmatal lines. The prothoracic and mesothoracic segments each 
bear a small blackish spot on the subdorsal area. The larva is very 
sparsely hairy. This species ranges from Canada to Texas, and its 
larvae feed on elm. The moths emerge in May and June, and in 
August. The larvae are usually solitary, and conceal themselves in a 
silken web between the leaves upon which they feed. There are two 
generations, and the larvae are active from June to October. The 
winter is passed in the pupal stage in crevices or under loose bark. 
This is not considered a serious pest, but it is sometimes abundant 
enough on elm shade trees to attract attention. 
Famiry PTEROPHORIDAE 
The Plume Moths 
The plume moths are rather small and frail in appearance. They 
have long, slender legs with long spurs and strong scale tufts. The 
forewings in most species are deeply cleft at the middle of the outer 
ee “and the hind wings are divided into three parts resembling 
athers hence the common name “plume moths.” The eggs are of 
