Cloudless Sulphur (Phoebis sennae)
This butterfly has both a green and yellow form of caterpillar.  See below.  It is called a cloudless sulphur because it has no black border as seen from above as other sulphurs have.  Cloudless sulphurs like red flowers.
Cloudless Sulphur
(Female) Broadmoor Terrace, Shreveport, Caddo Parish, LA, October 11, 2012  It is called a cloudless sulphur because it has no black border as seen from above as other sulphurs have.  Cloudless Sulphurs like red flowers.
Cloudless Sulphur
(Male) Broadmoor Terrace, Shreveport, July 30, 2005
Cloudless Sulphur Egg
(Egg) Freshly laid egg on Cassia, Eddie Jones Park, Caddo Parish, LA, July 22, 2009
Cloudless Sulphur Caterpillar
Keithville, LA, September 13, 2005
Cloudless Sulphur Caterpillar
(Catapillar Yellow Form) Keithville, September 13, 2005.  This caterpillar traveled 104 feet due east in 110 minutes from the host plant to this location where it formed its chrysalis. This is almost a foot a minute.  This is an average speed of about a foot per minute. 
Cloudless Sulphur Caterpillar
 (Catapillar green form) Keithville, September 13, 2005.
Cloudless Sulphur Chrysalis
(Chrysalis) Keithville, LA, September 18, 2005   Cloudless Sulphur Hostplant
(Food Plant) Cassia corymbosa: Plants of the genus Cassia (also called Senna) are one of the host plants for the Cloudless Sulphur butterfly.  The pictures of the yellow form of the Cloudless Sulphur were taken taken of caterpillars on this bush.