INSECTS INJURIOUS TO THE POPLAR. Lot 
6. THE POPLAR AZGERIA. 
_Egeria tricineta Harris. 
Boring in Populus candicans in winterand spring, the moth perhaps placing her eggs 
in the deserted burrows of Saperda mwsta. They inhabit the branches, suckers, and 
small trunks in New York, on the smaller stalks raising galls. The larva dull white, 
head light brown, otherwise much as in other Agerian caterpillars. (Described by 
D. S. Kellicott in Can. Ent. XIII, 3.) 
AFFECTING THE LEAVES. 
7. THE STOUT POPLAR SPAN WORM. 
Biston uraaria Walker. 
Order LEPIDOPTERA ; family PHALENID2. 
In some seasons, during July, partially defoliating the Lombardy poplars in Mon- 
treal, Canada, large drab or dingy purple span worms, at the evd of July burying 
themselves in the earth, the moths appearing during the last week in April and the 
early part of May. 
According to Mr. G. J. Bowles (Can. Ent. VIII, p. 7) this span worm 
abounds year after year in the Lombardy poplars in the city of Mon- 
treal. ‘In some seasons the trees are partially defoliated by the larve, 
and during the last week of April and the first of May the moths are 
to be found in great numbers.” On the 6th of May the moths laid glob- 
ular eggs .04 inch in diameter, depositing them some days before the 
leaves expand. May 29th the larve began to hatch out just as the pop- 
lars were throwing out their leaves. The larvee change but little during 
growth. At the end of July they descend and bury themselves in the 
earth, changing in a few days to pup, without forming any cocoon. 
The larva is from 2 to 24 inches long, of a drab or dingy purple; head of a lighter 
shade and spotted with black. First segment behind the head bordered in front with 
a yellow line, indented behind; fourth to eighth inclusive, each with six very small 
yellow tubereles, two on the back, one behind and one below each spiracle. Body 
striped from head to tail with twelve reddish lines, each bordered on both sides by an 
irregular narrow black line; six of the reddish lines are on the back and sides, one 
(interrupted) through the spiracles, and four on the abdomen. Anal segments spotted 
with black, as also first, second, and third segments. Mouth pinkish, legs pink- 
spotted with black; spiracles dark. (Bowles.) 
The moth.—This genus may be known by the large heavy body and rather small 
wings; the fore wings have the costa straight, the tip subrectangular; the male an- 
tenn with long pectinations. This species is dark granite-gray, the fore wings with 
three transverse, obscure, dusky lines, represented in rubbed specimens by black spots 
on the costa and veins. First line well curved; second and third lines near together. 
Half way between the third line and the outer edge of the wingis a faimter band than 
the others, represented by a costal square spot, and a black spot on the inner angle. 
Hind wings with three transverse diffuse bands. The fore wings expand 1.55-2.00 
inches. 
&. THE WAITE-S CLOSTERA. 
. Ichthywra albosigma Fiteh. 
Order LEPIDOPTERA; family BOMBYCIDX. 
Early in July, eating the leaves and reposing in a cavity formed of leaves drawn 
ogether like a ball, a large black caterpillar with white and yellow dots and stripes: 
