Second
Instars on Milkweed
#1 molted to
Third Instar
on 12
June 2011, Photo taken on 16 June.
#1 Molted to
Fourth
Instar on
17 June 2011, Photo taken on 22 June.
Close-up of #1's
Head
Fifth Instar
Pupa
Larva made a
nest using
it's
own hair then formed a pupa
Pupa
on 24 July 2011- After removing hair nest
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Pupa
on 24 July 2011- After removing hair nest
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Pupa showing wing
markings - 26 July 2011
about 10 hours
before
adult
emerged
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Pupa showing wing
markings - 26 July 2011
about 10 hours
before
adult
emerged
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PHOTO DETAILS -
ŠNicky Davis
John Richards located a female in
a light
trap 20 May 2011, Catalina State Park, Pima
County, Arizona. She
had a wingspan of 45 mm. Forewings and
hindwings were all
white. The only black markings noted
were along the main veing of
the forewing. The abdomen had the
typical yellow markings of an
Arctiid with the black spots along the
Sides. She was placed in a
paper sack and after a few days started to
deposit ova in small
clusters. They were about 1 mm and a
yellowish pearl color.
She oviposited 120 ova. John looked through
several books and computer
resources. The only white Arctiid with a
black vein that he could
find was the Edtypis clio. However, the
pictures showed much more
distinctive markings and more of them than he
could remember but the
female had been in a bag and may have
lost some of her
markings. Ectypia clio feed on Asclepias
sp. (milkweed) and
Dogbane.
1 June 2011, John photographed some ova
which were a light
grayish-tan color with a mottled maroon spotty
coloration. Some
others had turned black.
2 June 2011, Some hatched from the black
ova. They appear
black in color. When magnified
they are a pale
yellowish-gray body with moderate black
hairs. Body length is
2mm. He offered dogbane, marigold and
dandelion.
3 June 2011, More hatched about 15 in
total. They are refusing to
eat Dogbane, clover, spurge, dandelion and
marigold.
6 June 2011, They started eating the offered
Milkweed , Asclepias
speciosa.
7 June 2011,
First instars are 4 mm long, double the
size the day they first
hatched. The body is a medium
yellow/brown. A lighter band
is down the middle of the back without a
distinct edge. The head
is blackish and round and the thoracic shield
is the same color.
Each segment from the 4th to the 10th has 5
black bumps: two dorsally
and two ventrally and then one more a little
more toward the ventral
side. This is repeated on the other
side. The dorsal ones
have two long hairs that are dark but hard to
tell the color. The
third one has only one hair and the other two
appear to have none.
9 June 2011, Half of them shed their
first instar skin.
They seem darker and with longer hairs.
They are now 4 mm long
John gave some
larvae to
me to finish rearing while photographing them.
12 June 2011, #1 molted to third instar.
14 June 2011, Three molted to third instar.
17 June 2011, #1 molted to fourth instar
22 June 2011, #1 molted to fifth instar
25 June 2011, #1 is now 22 mm long.
28 June 2011, #1 is now 23 mm long.
5 July 2011,
#1
was 40 mm and walked off the plant again
14 July 2011 #1 formed a pupa
26 July 2011 #1
adult
moth emerged
LIFE HISTORY:
Ovum: Under 10 days
Larva: These larva would eat for a while, then
seemed to go into a
diapause - over 34 days
Pupa: 12 or more days
Adult: unknown
Broods: unknown
Hibernation: unknown
HOST PLANT:
Showy
Milkweed
Asclepias speciosa
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