Cryptocephalus sp.

Adult: 5mm.

Family Chrysomelidae/ Subfamily Cryptocephalinae - Cylindrical leaf Beetles

The generic name is taken from the Latin words "Crypto" = hidden, and "Cephalus" = head, thus, hidden head. The head of this beetle is not visible from above and can be retracted into the thorax when there is danger. Also, the legs can be retracted tightly up against the body. This is their way of protecting themselves. They fall to the ground if you try to touch them. There are many species of these little beetles and several live in coastal San Diego County. This particular kind favors the coastal sage scrub areas, and though the host plant is unknown, they are regularly found on Eriogonum fasciculatum, buckwheat. The larvae are case-bearers, as all of those in the subfamily Cryptocephalinae. The case is made of chewed plant material which is enlarged as the larvae grow and will eventually be their cocoon for when they pupate. The head is heavily armored and acts as a plug when the animal withdraws in times of danger.