Field Guide

Scoliid wasps are a family of beetle hunters. Large, rather hairy wasps, some are handsomely colored. The female digs in soil, finds a scarab beetle grub, and lays an egg on it.

Blister beetles in the genus Meloe are called oil beetles because of a yellowish oil they excrete from their joints when squeezed or distressed. This oil contains cantharidin, an irritating chemical that can cause blistering in many people.

The Halloween pennant is one of the more common members of its genus. Distinctive wing markings include a complete brown band (not just a spot) positioned just short of the wing tip.

The locust borer is a longhorned beetle whose larvae tunnel into the trunks of black locust. The colorful black and yellow adults are often seen in late summer as they feed on the pollen of goldenrod and other flowers.

The European hornet is a large, nonnative hornet that was introduced to New York in the mid-1800s. They now occur across most of the eastern United States, including Missouri. People may misidentify them as the highly publicized, so-called murder hornets.

Darkling beetles are a very large family of beetles. Most are dull black or brown, crawl on the ground, and are scavengers. Many of them resemble what you might call a “base-model” beetle.

Cockroaches well-known: they are flattened, small, brown or black, often shiny insects that can hide in tight crevices and lack specialized appendages. Recently, termites have been included in their order.

The common meadow katydid is aptly named: it is well-known and widespread in the eastern United States. Listen for its distinctive call — like a pulsating circular lawn sprinkler ratcheting around — in midsummer to the first hard frost.