[3] The adult females are 14 to 16 mm in length with dark brown coloring and yellow markings all over the body.

They have about the same body length, and the main differences include their antennae being completely dark brown, and having hair on the broad yellow plate (clypeus) at the front of their heads.

Also, their upper hind limbs (femora) on their median legs are brown with a thin, long, yellow stripe.

[3] L. vechti build their nests in sheltered areas on flat, vertical, or horizontal surfaces (such as on the faces of overhanging rocks).

This percentage remains about the same throughout the day as different wasps return and leave for various reasons, and the number increases to about 90% as night falls.

This posture usually includes holding the abdomen to one side, and individuals will often lie on top of each other while resting.

Falling fights and other more aggressive defensive maneuvers are more frequent on nests located in the center of the clusters.

This is an example of the selfish herd theory and demonstrates how individuals may cluster together for protection against predators, but the ones in the middle tend to be safer than those on the outside.

This is an example of the attacked neighbor risk and reduces some of the benefit gained by participating in selfish herd tactics.

[5] As is characteristic of Stenogastrinae, L. vechti secrete a type of gelatinous substance (which is produced by the Dufour’s gland) from their abdomens, which they use to care for the offspring and to lay their eggs.

As the larvae mature, they develop salivary glands, and afterwards they enter a pupal stage which can last for over 36 days.

[5] Like most hover wasps, L. vechti reproductive females mate singly and are therefore more closely related to the brood than any of the other nestmates are.

While this happens, they either do not move their antennae or hold them quivering to one side, and their abdomens are pointed downwards slightly.

A wasp might also solicit food by rubbing the sides of the other individual's head with her front legs and flapping her wings vigorously.

Trophallaxis usually happens too quickly to be observed, and a forager will often leave the nest a few seconds after arriving because she is often rushed by many wasps at the same time.

[3] Nestmate recognition and the establishment of reproductive status and dominance are often maintained through facial markings and chemical signaling.

Acts of aggressions are much more likely to be exhibited towards a female with these distinctive markings in order to maintain a control system within the nest.

This female spends the majority of time on the nest and engages in egg-laying and abdominal pap collection.

The subordinate will often lower its head, cease voluntary movement, and sometimes even release a drop of liquid from its abdomen as a deferential act.

When the dominant female returns, she will "fight" this individual, often for several hours and possibly even a couple days, to determine who will be in charge of the nest.

[3] When an individual of L. vechti feels threatened, it will assume a menacing stance by bending its abdomen to one side and pointing the tip in the direction of its challenger.

[3] The main predators of these wasps are hornets (especially Vespa tropica), ichneumonid flies, and ants.

[5] The hornets attack and damage the nests by ripping the cells apart with their mandibles and then extracting portions of the brood.

[5] When a hornet or other flying predator approaches, the wasps engage in aerial attacks by throwing themselves into the air in the direction of the potential danger.

They actually engage in this behavior very frequently and do so in response to any insect of similar size to hornets that approaches the nests in a questionable manner.