798 
[Assembly 
of meadows and prairies. I have met with it upon peach but never upon apple 
leaves. The margin of the fore wings presents a curious appearance, being occupied 
like several of the other species with a row of dots, which, when magnified, resemble 
a string of beads, and it is almost always the case that, around the entire margin, 
every fourth dot is white, the other tlnee being black. 
The Chestnut lace-wind (H. Castanea ) has all the veins white alternated with 
black or brown rings, with the usual two series of veinlets black feebly margined 
with dusky; a large blackish dot on the first longitudinal vein at the apex of the 
outer basal cells, and a smaller one at the next fork beyond this, and similar dots on 
the inner rib-vein at the origin of each of the discoidal veins; wings hyaline, the 
margins faintly tinged with smoky. Body whitish with a large spot under each eye, 
a stripe on each sid 3 of the thorax and a row of spots on each side of the abdomen 
brown. Wings expand 0.65. This is one of the most common species throughout 
the northern and northwestern States, and both the larvae and the perfect insects 
may always be found upon chestnut trees infested with piant-lice, and also upon the 
walnut and other trees, from April till October. It varies much in the depth of the 
color of the dots on the wings and the rings upon the veins, these being sometimes 
black and very distinct and at other times much more faint, either brown or tawny. 
The dots on the margin are white interspersed irregularly with black ones. A va¬ 
riety has all the rings upon the veins black and more broad than usual, and instead 
of the three dots which commonly occur upon the inner rib-vein this vein isannula- 
ted with black through its whole length. The larva is white or tawny yellowish, with 
a slender brown line in the middle and a row of blackish spots on each side, the head 
with two large longitudinal black spots and a black dot above the base of each leg. 
Its sides have a serrated appearance, from a row of projecting tubercles the tips of 
which are furnished with slender radiating hairs. 
The Preserver laoe-wino (H. tutatrix ) has translucent wings with white veins, 
which on the fore wings have black rings at somewhat regular intervals, and from 
each side of each ring proceeds a short smoky brown line, which is inclined towards 
the apex of the vein, thus forming a series of V-shaped mark# crossing the veins at 
each ring; near the base of the inner margin of the fore wings are a few black dots. 
The body throughout is white tinged with yellowish; the thorax has three brown 
spots on each side which are often somewhat confluent into a continuous stripe; the 
abdomen has a row of eight brown spots each side of the middle, situated upon the 
sutures. The wings expand 0.60. This is much-like the preceding species, but is a 
size smaller, with the wings more clear and glassy and without any dusky tinge to¬ 
wards their margins, and with the series of marginal dots all white. It was captured 
in September upon apple trees. 
The United-veined lace-winq (H. conjunctus) has pellucid wings becoming 
dusky towards the margins; veins of the fore wings white with blackish rings and 
bands; a blackish spot around each of the veinlets except the two innermost ones, 
and a smaller spot at the base of each discoidal vein; marginal dots alternately black 
and brown, the black ones occupying the apices of the veins; lower wings and their 
veins without spots. Wings expand 0.63. The wings are spotted much like those of 
alternatus, except that the margin is wholly immaculate. Its spotted wings at once 
separate it from the following species, which differ from all our other lace-wings with 
