Blister Beetles

Blister beetles, in the Meloidae family of beetles, earned their name from their defense system. They secrete a caustic chemical, cantharidin, which is an effective repellent for predators and can cause blisters on the skin when the beetles are handled.

The bodies of blister beetles are usually long and slender and often bi-colored. Their antennae are threadlike or beadlike.

Blister beetles use their strong jaws to chew the flowers and foliage that they feed on.

Mylabris sp.

The bright red and black pattern on the blister beetle pictured above is a warning sign of their toxicity to predators.

Mylabris sp.

Beetles in Sinai

Beetles, forming the largest order of insects with nearly 400,000 identified species, account for nearly 40% of all insects. So I guess it’s no surprise that my collection of beetle images is one of my largest!

Beetles in Sinai

Here’s what you can see in this sampling:

Blister Beetle
Carpet Beetle 
Darkling Beetle
Red Palm Weevil
Seven-spotted Ladybug
Hairy Rose Beetle
Jewel Beetle
and a few unidentified beetles (the blue/green ones…can anyone help with an ID?)

Ladybird Beetles

Desert Garden Ladybugs (2)

Ladybird Beetles, or Ladybugs as I grew up calling them in North America, are quite well-known beetles, but some people may be surprised to learn that you’ll find these colorful beetles in the deserts of Sinai.

Desert Garden Ladybugs (1)

Ladybirds are red, yellow, or orange colored beetles with small black spots on their wing covers. They have small dome-shaped bodies and six short legs. Contrary to popular belief, the number of spots do not indicate age but rather a specific species. Both of the beetles pictured above are Seven-spotted Ladybird Beetles (Coccinella septempunctata), one of the most common.

I have also seen Eleven-Spotted Ladybirds (Coccinella undecimpunctata), pictured below, on caper plants in the wadis around Dahab.

Ladybird Beetles (5)

Both the larvae and adults feed on aphids, small insects that suck the sap from plants. Ladybirds are therefore quite useful in helping to fight these pests in gardens, especially the ones in the mountains around St. Katherine’s, but also in my own desert garden. 🙂

Wadi GNai_Oct13 (12)

When threatened, adult ladybirds release a yellow substance from a joint on their leg that is distasteful to predators and convinces them to find their next meal somewhere else.

Ladybird Beetles (4)

The Bedouin in Sinai call Ladybird Beetles ‘uwaynat umm sulayman, or “the eyes of Solomon’s mother”.

In traditional folklore in some cultures, Ladybird Beetles are thought to bring good luck. Have ladybirds brought you any luck in the Sinai?

References:

Zalat, S., & Gilbert, F. (2008). Gardens of a Sacred Landscape: Bedouin Heritage and Natural History in the High Mountains of Sinai. Cairo: The American University in Cairo Press.

Seven-spot ladybird (Coccinella septempunctata) on ARKive.org