Western Sulphur
Colias occidentalis pseudochristina

Immatures

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Adults     Female Eclosure     Male Eclosure     Specimen

OVA

Oviposited on June 25, 2008
ovum laid on June 25, 2008
About to hatch on June 29, 2008
Ovum about to hatch June 29, 2008


LARVAE

First Instar - 29 June 2008
1st


Second Instar - July 06, 2008
2nd

2nd


Third Instar - July 11, 2008
3rd

2nd


Molted to Fourth Instar on May 14, 2009
Fourth Instar Photos - May 15, 2009
4th

4th


Fifth Instar
Molted to fifth on 18 May 2009
 Photos shot on 21 May 2009
l

l


Fifth Instar Stripe variant
May 22, 2009
stripe

l

PUPAE

#1 Pupa formed,
photographed  24 May 2009
3/4 inch long
pupa


#3 Female Pupa
 8:21 A.M. 2 June 2009
30 Minutes before eclosure
June 1

#3 Female Pupa
 8:21 A.M. 2 June 2009
30 Minutes before eclosure
pupa

#4 Male Pupa formed 26 May 2009
Photo 9:43 A.M. 2 June 2009
pupa

#4 Male Pupa 2:11 P.M. 2 June 2009
1 hour 7 minutes before eclosure
pupa

Photo Details - ©Nicky Davis
Located females at Strawberry Reservoir June 24, 2008. 
Elevation 7709 feet
Coordinates  North 40.09.85, West 111.11.517

Oviposited  June 25-27, 2008 some on lathyrus lanswardi but mainly Astragalus cicer. Eclosed in three to four days and were set on Astragalus cicer to feed.  Although they were kept in light 24x7, they all hibernated as third instar.  They were put in a refrigerator July 23, 2008 at about 40 degrees and after a couple of months were transferred to a refrigerator at 32 F..  On May 8, 2009 the third instars were taken out and placed on Astragalus cicer where they began feeding again.   May 14th  they molted to fourth instar.  On May 18, 2009 they molted to fifth instar.


Larva
Photos  of First through Third Instar in 2008 and the last two instars  in 2009.

Time spent
as ovum = 4 days
Larva=  about twelve days in 2008 and  about 18 days in 2009
Pupa =  7 - 8 days

Host Plant
can't feed on hedysarum

Lanszwert's Sweetpea ==Mountain Pea - Lathyrus lanszwertii

Mountain Goldenpea==Mountain Goldenbanner==False Lupine - Thermopsis montana

Chickpea Milkvetch - Astragalus cicer

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