Ova
Ova -
photo by Todd Stout
# 1 - First
Instar
Head
case discarded by the first Instar
after it molted to second instar
#1 - Second Instar
#1
- Third instar on July 24, 2006
#1 - Third Instar inside nest
#2
- Fifth Instar
#2 - Fifth Instar
#2
- Pre-Pupa - August 5, 2006
#2
- Pre-Pupa - August 5, 2006
Photo
Details - ŠNicky Davis
Todd
Stout
collected this ova
on an
Aspen leaf 17.5 miles S.E. of Alpine, Lincoln
County, Wyoming - July 8,
2006.
Ova
July
09, 2006
Larva
Larva
#1
1.
July 14, 2006
Newly
eclosed larva just after being placed on aspen
2.
July 15, 2006
It
looks as
if this larva is on a
twig but in reality it is a twig look-alike
constructed entirely by the
larva in just one day. This little
guy is amazing. After each meal he goes to
the edge of the leaf
and
works on constructing this string bridge, twig
look-alike object.
He adds a length to the
string after each meal. Then he sleeps on
the string. It's
really
weird because the string is so strong it sets out
from the leaf
horizontally with no support at the end of the
string. I think he
has
"guy wires" going from furthur out on the leaf to
hold it in that
position. He must have been an engineer in his
previous life. Maybe
our ancient engineers learned their trade from
watching these
caterpillars.
3.Discarded
head
case after molt
from first to second instar, July 17,
2006
4. July
17, 2006 - Second
instar has created a perch
by chewing away the leaf and extending the
leaf's vein with dung pellets.
5.
3rd instar -
Morning of
July 24, 2006
6. Evening
of
July
24th - This
larva constructed a hibernacula today by
attaching silk to each
side of an
aspen leaf. It will over-winter as the third
instar larva.
________________________________________________
Dale
Nielson provided larva #2
Pre-Pupa-Larva
#2
1.,
2. Photos show larva in the classic "J"
position, set to
form pupa
Larva
Fifth Instar- Larva #2
1.
head
2. lateral
Fourth
Instar
No
photo available
Host
Plant
This ova was
on Aspen which was also
used as host plant for the larva. For
available photos of
host plants click on your choice of
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