Treasures of Oz

Celebrating the Natural Gems of Ozaukee County

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Recreation

Bevy of Beetles

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Salutations, BugFans,

This week’s episode features a Bevy of Beetles.  Beetles are in the Order Coleoptera, which you Latin and Greek scholars know means “sheath wings.”  Their pair of membranous, flying wings is covered at rest by a top second pair of wings (the elytra) that protects them, but because the elytra have to be held out to each side in flight, they fly awkwardly.

Long-horned beetle

Long Horned BeetleWith antennae that may be twice as long as their body, the Long-horned beetles (Family Cerambycidae) includes some elegant-looking beetles.  The Family includes many species with names like “borer,” (stump, root and bark, but NOT the infamous Emerald Ash Borer which resides in a different beetle family), “sawyer,” “pruner,” and “girdler,” so we know what they are up to in their spare time and why some species are so unpopular with the timber industry. For the same reasons, they are important players in Mother Nature’s recycling program. The larvae of many species rummage around in trees and shrubs, living or dead, often leaving characteristic trails in the wood, under the bark.  According to Kaufman, in the Field Guide to Insects of North America, others girdle a twig or small branch and lay an egg in the groove; when the grub hatches, when the grub hatches, it eats now-dying twig that its mama provided.  Some long-horned beetles “vocalize,” producing a squeak made by friction when they nod their heads.  “Lng hrnd beetle 9” (who might possibly be Centrodera decolorata – many insects do not have common names) is about 1 ½ inches long, excluding its antennae.

Blister Beetle

Blister beetleThe Bug Lady has photographed hundreds of insects and has never been bitten/stung in the course of taking their portraits, but she won’t touch this beauty, found on goldenrods during the month of August (and we’ll discuss ants at a different time…).  Blister beetles produce on their persons an irritating substance called cantharadine, once used as an aphrodisiac. If you touch them, you'll get a dry, itchy blister that will last about a week. They are identified by their velvety appearance and the fact that their elytra (ee-lee'-tra), the hard, modified forewings that cover the softer, folding flying wings, are somewhat shorter than the abdomen.

 

Klamathweed beetles

Klamathweed beetleDespite the efforts of TV advertisers to sell you natural tranquilizers made of St. John’s-wort, the plant is not welcome over much of its range.  St. Johns-wort is a sun-loving, alien invasive plant that loves road edges, fields and pastureland.  When cattle (and susceptible people) eat it, the incomplete metabolism of its pigment dots results in chemicals being deposited just under the skin layer.  That causes the consumer to become extra sensitive to the sun’s rays and to burn easily.  Klamathweed beetles are alien beetles imported as a biological control of St. Johns-wort on western grazing lands (they seem to be moving east), and from what the BugLady has seen in her fields, they do an effective job on it.  The BugLady, however, has reservations about the concept of introducing one foreigner to eat another foreigner, as in “No worries, Mate - when it finishes eating the __(fill in the blanks)_ it won’t move on to anything else…….”

Beetles are the largest order within the Class Insecta.  Every fifth living thing (not every fifth INSECT, not every fifth ANIMAL – Every! Fifth! LIVING THING!) is a beetle

The BugLady