744 F1F1H REPORT OF THK ENTOMOLOGICAL commission. 
Prom what we have been able to learn, we conclude that there are 
two broodfl Of this insect in a year, and that the second brood hiber- 
nates in tlie larva state. May IM, burrows were found from which the 
moths had already issued. In the breeding cages at Washington the 
mot lis issued until June 20, when the last one made its exit. August 
23, larvae were received which were nearly full grown, and were pre- 
sumably of the second brood. In the following January nearly all the 
larvae found were only about half grown; none were more than two- 
thirds grown. 
At the approach of winter the larvae prepare their burrows for hiber- 
nation by lining them with delicate layers of white silk, which often 
form tubes closed at the lower end. The larva remains through the 
winter with its head at the posterior end of the mine. Before the 
change to the chrysalis state, however, this position is reversed and the 
head is towards the opening. 
Wherever a twig is pierced and bored by one of these larva? the leave- 
begin to turn yellowish and the twig often dies. In many cases, how- 
ever, more than one of the larva? are to be found in a single twig, and 
this of course more certainly insures its death. It seems probable that 
the principal damage done is the disfiguring of the shape of the tree by 
the destruction of the terminal shoots. 
The moths bred from the burrows were submitted to Professor Fer- 
nald, who decided that they represented a new species, probably be- 
longing to the genus Retinia. This species he describes in the Cana- 
dian Entomologist, vol. xi, p. 157. We quote Professor Fernald's de- 
scription of the moth, and append descriptions of the larva and pupa 
so that the insect may be recognized in whatever stage it is found. 
It is probably this caterpillar which in the summers of 1873-'74 proved 
very destructive to the pitch-pine bushes in and about Brunswick, 
Me., causing the upper part of the bush to turn yellow and die. 
April 2, 1883, we found a larva in a burrow situated partly in pitch, 
head downwards. We also noticed that the new growth of leaves at 
the end of the twig infested were about one-third as loug as the normal 
needles. 
The moth. — Head in front, basal joints of antenna- and palpi white; last joint of 
palpi and a few scales npon the outside of the middle joint dark gray. Eyes black, 
vertex light snlphnr yellow to straw yellow, antenna- dark brown, annnlated with 
whitish. Thorax above white, with a few scattered grayscales; beneath silvery 
white. Abdomen above light brown, with a silvery luster ; lighter at the end of 
each segment : beneath lighter : last segment in the females darker brown above and 
beneath, and without the silvery luster. Anal tuft in the males Light straw color. 
Fore and middle legs light brown, femora and tibia- of hind legs white, tarsi of all 
the legs brown, ringed with white. Forewings ferruginous brown, the extreme 
OOStal edge from base to near the apex dark brown. A number of small white spots 
rest upon theOOSta, four hairs beyond the middle, from all of which stripes composed 
of white and leaden-hued scales extend, more or less irregularly, across the wing at 
nearly right angles with the costa. and having something of a wavy appearance in 
some specimens, with some indication of a basal patch, a central and subterminal 
