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The larvae of many beetle families are predatory like the adults (ground beetles, ladybirds, rove beetles). The larval period varies between species, but can be as long as several years. The larvae of skin beetles undergo a degree of reversed development when starved, and later grow back to the previously attained level of maturity.
European rhinoceros beetle European rhinoceros beetle – three stages from larva to adult: larva (back), pupa (center), and imago (front). The Dynastinae are among the largest of beetles, reaching more than 15 centimetres (6 inches) in length, but are completely harmless to humans because they cannot bite or sting.
Figeater beetle larvae, commonly called "crawly backs", [3] grow up to 2 in (5.1 cm) and are thick and white with a dark head. They have six small, ineffectual legs; to move, they roll onto their backs and propel themselves upside down, using the stiff dark hairs on their backs to gain traction.
The varied carpet beetle (Anthrenus verbasci) is a 3 mm-long beetle belonging to the family Dermestidae, positioned in subgenus Nathrenus.They are a common species, often considered a pest of domestic houses and, particularly, natural history museums, where the larvae may damage natural fibers and can damage carpets, furniture, clothing, and insect collections.
The larva of the black larder beetle has less strongly curved appendages. [4] Mature larvae of both species tend to bore into hard substrates such as wood, cork, and plaster to pupate. [19] Larder beetles are infrequent household pests. [20] Adults and larvae feed on raw skins and hides.
June beetle larva stage. The grubs will grow to about 40 mm (1.6 in) and are white with a brownish-black head and brown spiracles along the sides of the body. The larvae will molt twice before winter. The fully grown larva color is glassy yellowish white shading toward green or blue at the head and tail.
Adult Pyrophorus beetles feed on pollen and sometimes small insects, such as aphids or scale insects. Their larvae feed on various plant materials and invertebrates, including the larvae of other beetles. Eggs are luminous and are deposited either on or in the soil. [citation needed] Mature larvae and pupae are also luminous. They grow slowly ...
The larvae produce the sounds by rubbing the third leg against a striated area on the coxa of the second leg. While the taxonomy of Nearctic species is well-known (four species in the US, and 90 in Mexico), bess beetles in other parts of the world need further study.