Monobia quadridens, also known as the four-toothed mason wasp, is a species of solitary potter wasp found in North America. It grows to a wingspan of 18 millimetres (0.71 in), and feeds on small caterpillars and pollen. There are two generations per year, with one generation overwintering as pupae.
It nests in a variety of cavities including tunnels abandoned by carpenter bees, old nests built by mud daubers, and hollow plant stems.
Monobia wasps
![A monobia quadriden, or our-toothed mason wasp](https://npr.brightspotcdn.com/dims4/default/9019cc0/2147483647/strip/true/crop/1760x1084+0+0/resize/880x542!/quality/90/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2F3a%2F06%2Fa62049e64de5ae38172366b731ed%2Fmonobia-wasp.jpg)
Judy Gallagher
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