PSTCHE. 
under Psocus moestus. 
2. Psocus moestus Hag., Syn. N. 
Am. Neur., p. 11, no: 8.—5 specimens, 
male and female, Mass., August. 
color and pattern as in Psocus variegatus, 
but differs as follows : 
Vertex strongly spotted with black; 
front almost black, with dark longitudi- 
nal stripes ; antennae darker, the second 
basal joint with a yellow apical ring; 
legs brown, lighter rings around the base 
of the femur and on the knee; tibia 
darker on tip, first tarsal joint yellow. 
Wings darker ; pterostigma without yel- 
low; all veins and the marginal vein 
around the wing with alternate dark and 
white dots, both alike in size; a pale 
band, parallel to the apical margin but 
a little distant, runs later obliquely to 
the hind margin, and is finally bent up- 
ward ; the part of the membrane encircled 
by this band is spotted as the rest but 
with paler brown spots; the apical half 
of the front margin of the hind wings has 
alternating dark and white dots. The 
middle cell is as in Psocus quinquangu- 
lar, sometimes quadrangular. 
The two males mentioned under Pso- 
cus variegatus do not possess the alter- 
nating dots on the margin, nor on the 
veins, nor on the hind wings; the femur 
has no pale ring on the knee, the first 
tarsal joint is brown; the antennae are 
not so dark ; the pterostigma is yellow. 
Three other specimens, male and fe- 
male, from New England, probably from 
the White Mountains, are visibly larger. 
They look very different, and I believed 
them to be a new species. ‘The wings 
are less dark, the pale band and the 
encircled part are paler and more strongly 
Size, 
223 
marked, forming three brown festoons on 
the tip of the wing ; antennae paler ; legs 
as in Psocus moestus, but paler; dis- 
coidal cell quadrangular. I believe they 
had better be left with Psocus 
till other characters are known. 
3. Psocus lichenatus Walsh, Proc. 
Ent. Soc. Phil., 1863, p. 188. 
I possess only two types, male and 
female, from Rock Island, Ill. 
This species is nearly related to Pso- 
cus variegatus, but smaller, 3-34 mm. ; 
the discoidal cell somewhat quinquangu- 
lar. Head yellow, less spotted with 
black; front yellow, with black stripes 
formed by a series of black dots. An- 
tennae shorter than the wings, thicker, 
pilose ; basal joints yellow, dark at the 
base; the other joints black; but on the 
first joints the basal half white, on the 
following a white basal ring. Thorax 
brown, all junctures yellow. Legs yel- 
low; femur and_ tibia spotted with 
black ; first joint of tarsus yellow, second 
one brown. Front wings brown, with 
three pale, not spotted fields : a large one 
in the middle, beginning in the upper 
angle of the discoidal cell and dilated 
triangularly towards the hind margin ; the 
two other ones on the tip of the wing, 
separated above and below by a brown 
band; veins brown; paler yellow elon- 
gated spots near the veins, but not 
upon them; pterostigma brown, inner 
angle black ; three black elongated dots 
in the costal space near the pterostigma ; 
hind wings hyaline, front margin not 
spotted. The species appears in swarms 
in fall on sandstone cliffs. 
I know of no other North American 
species belonging to Amphigerontia. 
moestus 
