Meloe violaceus
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| Scientific classification Edit this classification | |
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| Template:Taxon infoTemplate:Taxon italics Marsham, 1802
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Meloe violaceus, the violet oil beetle, is a species of oil beetle belonging to the family Meloidae subfamily Meloinae.
This beetle is present in most of Europe, in the eastern Palearctic realm, in the Near East, and in North Africa.
This species is characterised by hypermetamorphosis, a kind of complete insect metamorphosis in which, in addition to the normal stages of larva, nymph and imago, they have several others, with great differences in appearance and way of life.
The body of Meloe violaceus is 10–30 millimetres (0.4–1.2 in) long, females are somewhat larger than the males. These beetle are black-blue or violet-blue, head and pronotum are very finely dotted and the elytra are quite shorter than the abdomen, as in other Meloinae species.
The adults live on a sunny, dry area with flowering plants, feeding on pollen.
In May–June the female digs into the soil 20–30 millimetres (0.8–1.2 in) deep cylindrical holes, where they lay a very large quantity of eggs (about 2,000–10,000).
After about a month larvae emerge from eggs and climb up on grass or on flowers, waiting to cling to the thorax of approaching potential host insects seeking pollen or nectar.
The larvae have an exclusively parasitic life, primarily in the nests of solitary bees, or sometimes of locusts. If the larvae have inadvertently selected a honey bee, they die in the hive and may cause serious damage.[citation needed]
When the host female bee lays eggs in its cells, the first-stage larva of the violet oil beetle eats the eggs of the bee, increases in volume and becomes the second-stage larva, which continues its development eating honey and pollen. The larva, after other two stages, forms the nymph and finally the imago.
References
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- Anderson, R., Nash, R. & O'Connor, J. P., 1997, Irish Coleoptera: a revised and annotated list, Irish Naturalists' Journal Special Entomological Supplement, 1–81
- Buck, F. D., 1954, Coleoptera: Lagriidae to Meloidae
- Bug Guide, Oil Beetles (Meloe)
- Buglife - The Invertebrate Conservation Trust, Join the Hunt for Amazing Oil Beetles
- Buglife - The Invertebrate Conservation Trust, Oil Beetle Life Cycle
- Funet
- Meloidae
External links
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