Jutta Arctic
Oeneis jutta reducta


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Ova - Oviposited 7 July 2010
jutta ova

First Instar
Oviposited 7 July, Hatched 19 July 2010 - Photo on 20 July 2010
One day old first instar

Second Instar - lateral view
Oviposited 7 July - Hatched 19 July  - Began feeding on 22 July -
 Molted to Second Instar on  29 July - Photos on 1 August 2010

Second Instar

Second Instar - Dorsal View
Second instar dorsal view

Third Instar on 4 August - Photo on 4 August
Third instar

Fourth  Instar on 12 August - Photo taken 15  August
4th Instar

Fifth Instar - 21 August
fifth instar

Sixth Instar - Molted on 26 August - 30 mm long - Photo on 28 August 2010 - Dorsal
6th instar_dorsal view

Sixth Instar -  Molted on 26 August - Photo on 28 August 2010 - Lateral
6th instar, lateral view

Sixth Instar - Photo showing two tails
two tails

When they form a "C" and are unresponsive they are
likely in the prepupa stage.  They will form a pupa within 72 hours


Pupa on 2 October 2010
2 October 2 October 2 October, 2010

Pupa Showing Development
showing development showihg development showing development

Pupa Five Hours Before Adult Emerged
5 hours before emerging 5 hours before emerging 5 hours before emerging

PHOTO DETAILS - ©Nicky Davis
LOCATION: On 2 July 2010  two females were  located by Todd Stout at Christmas Meadows Road; East side of Utah Highway 150, .4 miles ESE Stillwater Campground, Summit County, Utah.  Les and Nicky Davis reared and photographed the immatures on Carex microptera
ELEVATION: 8600 Feet

See detail on  title of each photo

Two females oviposited  over several days on sedge, the screen on the side of the cage and the tricot material  that covered the top of the cage. One hundred ten ova hatched. Forty ova were given  to Todd Stout who located the females

Ova:  12 days

Larvae:  Variable since  about  half the larvae hibernated at second instar even though they were reared at about 78 degrees and with 24 x 7 lights.  Three stopped eating, walked off the plant, became shorter and wider then formed pupae. Twenty-one sixth instars have not pupated nor hibernated.  They are still feeding but at a slow rate.  Nine larvae that had stopped feeding at second instar began feeding again before they were put into hibernation temperatures and are still feeding as of the middle of October.  They are now last instars.

Pupae:  7 -  9 days

Adult:  Unknown  but I had the adult females for a couple of weeks and they continued to oviposit until the last day.

Broods:  Biennial per "Butterflies of North America" -  James A. Scott. 1986

Hibernation:  Overwinter as  first to third instar the first year and as fourth to sixth instar the second year per "Buterflies of North America" -  James A. Scott. 1986

Host Plant :
Small-winged Sedge - Carex microptera

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