Cerceris insolita

Cerceris insolita can be distinguished from other Cerceris species by subtle morphological characters, though specific diagnostic features for this species are not well-documented in readily available sources. Females of the genus typically have three yellow facial markings, while males have two. Identification to species level likely requires examination of genitalia and other microscopic features. The genus Cerceris is characterized by a robust body, relatively short antennae, and often distinctive color patterns on the face and thorax. Nests, when found, are pencil-sized burrows in sandy soil with symmetrical mounds of fine-textured diggings.

Based on genus-level characteristics, Cerceris insolita likely nests in well-drained, sandy or sandy-clay soils in open, sunny areas. Related Cerceris species favor habitats such as ball fields, dirt roads, playgrounds, and campsites with lightly vegetated, compacted ground. The species requires access to suitable prey populations in nearby wooded or forested areas.

North America, with confirmed records from Canada (Ontario) and the United States. The precise range within North America is not well-delineated in available sources.

As a solitary wasp, Cerceris insolita likely follows the typical crabronid life cycle: females dig underground nests, provision individual cells with paralyzed prey, lay eggs on the prey, and seal the cells. Larvae develop by consuming the paralyzed prey, pupate within the nest, and emerge as adults the following season. Specific details for this species are not documented.

Females are solitary hunters that capture and paralyze prey with their sting, then transport it to underground nests. Prey is carried upside down and head-forward beneath the thorax during flight, resulting in a slower, more direct flight path compared to unburdened wasps. When threatened, females may drop prey at the nest entrance rather than entering with it. Nests are often loosely aggregated in suitable habitat patches.

As a predator of other insects, Cerceris insolita contributes to population regulation of its prey species. Like other Cerceris species, it may serve as a biosurveillance tool for detecting wood-boring beetle populations, though this has not been specifically documented for C. insolita.

Not specifically documented. Related Cerceris species, particularly C. fumipennis, are valuable for biosurveillance of invasive pests such as the emerald ash borer. Cerceris insolita may have similar potential if its prey preferences include economically significant wood-boring beetles.

• Cerceris fumipennisShares the same genus and general nesting habits, but specializes almost exclusively on Buprestidae (jewel beetles) and is extensively used for biosurveillance. C. insolita likely has different prey preferences.
• Cerceris bicornisAnother North American Cerceris species that preys on weevils (Curculionidae) rather than buprestids. Burrow entrances may appear slightly larger, and discarded weevils rather than beetles indicate its presence.
• Bembix americanaA sand wasp that constructs superficially similar burrows, but these enter the ground at an angle with asymmetrically distributed diggings, and are found in sandier substrates. Does not leave paralyzed prey at nest entrances.

• ground-nesting wasp
• solitary wasp
• predatory wasp
• North America
• Crabronidae
• understudied species

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• Catalogue of Life
• Working with Cerceris fumipennis—Part 2 | Beetles In The Bush
• Working with Cerceris fumipennis—Part 1 | Beetles In The Bush
• Hymenoptera | Beetles In The Bush | Page 6
• Wasp, Geographic Data Improve Surveillance for Emerald Ash Borer
• Predatory Wasps and Citizen Scientists are Taking on the Emerald Ash Borer
• ID Challenge #19 | Beetles In The Bush