The four-toothed mason wasp (Monobia quadridens) has a black body with a few single white stripes. Males can easily be distinguished from females because they have a white spot on their face while females have completely black faces. They are solitary insects that all find their own places to nest. This species is primarily found on goldenrod plants, and it hunts caterpillars.
Human Stinging
General Info About Four-toothed mason wasp
Instantly identify insects with a snap
Snap a photo for instant insect ID and risk assessment, gaining quick insights on bite assessment, toxicity, pest control, behavior, habitat, and safe interaction tips, etc.
Download the App for Free
Attributes of Four-toothed mason wasp
Colors
Black
White
Habitat
cavity (tunnel; nest; plant stem)
Adult Food Sources
Nectar from flowers, pollen, honeydew, glandular secretions from plants, juices from damaged fruit
Larva Food Source
Larvae of other insects, caterpillars, beetles, aphids, small arthropods
Biting/stinging
The Four-toothed mason wasp may bite humans actively. Please stay away from it.
Allergy-causing
Not reported
Defensive attack
The Four-toothed mason wasp has special defensive behaviors that can trigger an allergic reaction. If there are serious reactions, seek IMMEDIATE medical attention.
Pest-Eating Predatory
Not reported
Phytophagous
The Four-toothed mason wasp feeds on plants, usually without causing significant harm. However, it's important to take the situation seriously if their numbers begin to increase significantly.
Predatory
The Four-toothed mason wasp typically preys on other arthropods and does not directly affect plants.
Biting animal or pet
Yes
Mouthparts Type
Chewing-lapping mouthparts
AI entomologist in your pocket, scan QR code to download
Species Status of Four-toothed mason wasp
It is found in North America.
Distribution Area of Four-toothed mason wasp
North America
Appearance of Four-toothed mason wasp
It grows to a wingspan of 1.8 cm, and feeds on small caterpillars and pollen. The abdomen of Monobia quadridens is entirely black, except for a broad ivory-coloured band on the first tergite. The wingspan is typically 1.09 - 1.4 cm for males, and 1.4 - 1.8 cm for females. It closely resembles Euodynerus bidens in size and colouration.
Egg The egg stage of four-toothed mason wasp is characterized by a small, oval shape, often laid in clusters. The eggs are typically inconspicuous, and development within the egg is focused on forming the basic structure necessary for the larvae to emerge.
Larva In the larval stage, four-toothed mason wasp appears worm-like, with a soft, elongated body often lacking true legs. Size and color vary with each instar as the creature grows, specializing in feeding and energy accumulation for later stages.
Pupal As a pupa, four-toothed mason wasp is encased in a cocoon or protected in a cell. It's a stage of transformation where the larval body reorganizes into adult structures. The pupa is immobile, and the exterior may change in color as development progresses.
Adult Emerging from the pupa, the adult four-toothed mason wasp's development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
Adult Size of Four-toothed mason wasp
1.5 - 2 cm
Predators of Four-toothed mason wasp Larvae
Arachnids, reptiles, birds, mammals
Predators of Adult Four-toothed mason wasp
Birds, reptiles, arachnids, insectivorous mammals
Scientific Classification of Four-toothed mason wasp
Unlock the secrets of insect life cycles, habitats, behaviors and observation tips!!
Download the App for Free
How Can You Attract Four-toothed mason wasp
Sugar-water solution or overripe fruit may be used as bait to attract four-toothed mason wasp.
Habitat Preferences of Four-toothed mason wasp Through Different Life Stages
The larvae of four-toothed mason wasp are typically found in nests constructed in hollow stems or in wood cavities created by beetles. These nests are usually lined with mud and can be located in various natural or man-made structures that offer suitable tubular spaces. Searching for larvae would involve inspecting these types of habitats. Adult four-toothed mason wasp are often encountered on flowers, particularly those in the Apiaceae and Asteraceae families, as they forage for nectar and pollen. To find adults, one should visit flowering plants, especially during sunny weather when they are most active. Pupae of four-toothed mason wasp are generally found within the same nests as the larvae, thus searching for nests in the aforementioned locations during the transition season can lead to the discovery of pupae.
When is the Best Time to Observe Four-toothed mason wasp
The best time to find adult four-toothed mason wasp is during warm days, usually mid-morning to late afternoon when they are most active.
What is the Best Weather to Observe Four-toothed mason wasp
Dry, sunny weather is ideal to find four-toothed mason wasp, as they are less active on cool or rainy days.
How and Where Can You Find Four-toothed mason wasp at Different Life Stages
Larva Larval four-toothed mason wasp are concealed within nests, often inside hollow stems or wood cavities. Locate potential nesting sites and observe for entrance holes or sawdust, which may indicate the presence of larval four-toothed mason wasp.
Pupal Four-toothed mason wasp pupae remain inside their nest cells. To find them, one must carefully open the nests without causing harm to the pupae.
Adult Adult four-toothed mason wasp can be found foraging on flowers or returning to their nests. Look for them in gardens or meadows with abundant flowering plants.
Are Four-toothed mason wasp harmful?
Your Complete Pest Control Guide
Discover effective tips for preventing and eliminating pest infestations to keep bugs away from your home.
Download the App for Free
The four-toothed mason wasp behaves aggressively if it feels threatened. It may bite, sting, or secretes a toxic liquid. DO NOT disturb it. You’d better leave it alone.
Are Four-toothed mason wasp harmful to humans?
Four-toothed mason wasp has a sting needle at the tail, which can sting people. But it is not aggressive and rarely attacks humans unless it is threatened. Even so, it should be treated with caution, because it will be very painful after being stung, and it will cause redness and swelling.
Harmful Effects of Four-toothed mason wasp
Reveal the harmful impacts of diverse insects
Explore the dangers of insects related to toxicity, lethality, human biting, human stinging, pathogenicity, hematophagy, allergenicity, parasitism, etc.
Download the App for Free
Human Stinging
Does the Four-toothed mason wasp sting humans?
Four-toothed mason wasp typically sting only in self-defense or when their nests are disturbed. Stinging incidents with humans are rare, as four-toothed mason wasp is not aggressive and prefers to avoid contact. Stings can cause pain and swelling but are not usually dangerous unless the person has an allergic reaction. Female four-toothed mason wasp have stingers, while males do not, and there is no significant harm to four-toothed mason wasp following a sting.
Explore how insects help as pollinators, pest predators, and biocontrol agents. From seed dispersal to decomposition, they play vital roles in our ecosystem.
Download the App for Free
Pollinator
Pollinator
Attract Plant Feature
Color, Smell
Four-toothed mason wasp assists in plant pollination primarily by seeking out flowers for their pollen, which they consume. While feeding, pollen grains adhere to their body and are subsequently transferred to other flowers, facilitating cross-pollination. Their attraction to flowers is guided by vivid colors and enticing scents.
Common Questions People Also Ask
Get Quick Insect Answers with a Snap
Snap a photo for instant insect ID and answers on bites, toxicity, pest control, behavior, habitat, and safety tips!