The Genista Broom Moths Caterpillar. These are tenting caterpillars similar to the Eastern Tent Caterpillars.

Genista Broom Moth on Skyblue Lupine | February 25 | Alice Mary Herden
These caterpillars leave silk like strands from leaf to leaf and create a tent or canopy like web for their pupa stage. These moths have 5 instars (stages of life). Two stages are the caterpillar (orange and green), pupa and two adult stages.
Host plants are Skyblue Lupine and False Indigo

Genista Broom Moth Caterpillars on Skyblue Lupine | February 25 | Alice Mary Herden
Links
https://bugguide.net/node/view/132367
http://nathistoc.bio.uci.edu/lepidopt/Pyralidae/Uresiphita.htm
http://bugeric.blogspot.com/2013/03/moth-monday-sophora-worm.html
Categories: Caterpillars, Chassahowitzka WMA, Moths