Mealworms are the larval form of the yellow mealworm beetle, Tenebrio molitor, a species of darkling beetle.
Mealworms in a bowl
In a bedding of bran
Mealworm detail
A mealworm pupa with molted larval skin
Darkling beetle is the common name for members of the beetle family Tenebrionidae, comprising over 20,000 species in a cosmopolitan distribution.
Darkling beetle
Tenebrionidae head
A tenebrionid larva (Eleodes sp.)
Diaperis boleti under bark of oak.