Apparently C. sanguinicollis larvae have a summer dormancy

 

Which makes sense, considering that it's when all the sage scrub plants dry up in the heat.

Abnormal photoperiods from indoors lighting and abnormally generous moisture regimes also did not break the dormancy, misting causes them to walk around in annoyance but eventually they retract and stop moving again. With that being said, the grubs do consume small amounts of food despite the dormancy.

Some have voluntarily refused both food and water for as long as 5 days, possibly even longer.