Sceliphrinae

Sceliphrinae can be distinguished from other Sphecidae subfamilies by a combination of morphological features including a thread-waisted petiole and specific wing venation patterns. Within the subfamily, genera differ in coloration: Chalybion species are metallic blue, while Sceliphron species are typically black with yellow markings. Definitive identification to genus or species level requires examination of detailed morphological characters.

Cosmopolitan distribution. Individual species have specific ranges; for example, Chalybion turanicum has become naturalized in Europe as an invasive species, and Sceliphron destillatorium occurs in Crimea.

Adults feed on nectar. Females hunt spiders (Araneae) to provision nest cells for their larvae. In Chalybion turanicum, 18 spider species from five families have been documented as prey, with Theridiidae (54% of specimens) and Araneidae (33%) being most abundant.

• Sceliphron destillatorium - nest hostChalybion turanicum nests exclusively inside old nest cells of this species
• Chrysis taczanovskii - nest parasiteReared from cells of Chalybion turanicum
• Acroricnus seductor - nest parasiteReared from cells of Chalybion turanicum

In Chalybion turanicum in Crimea, one generation per year with 67% reproductive success. Each nest consists of a single cell provisioned with 5-31 spiders (mean 17.6). General life cycle patterns for other Sceliphrinae species are not well documented.

Females construct nests from mud or utilize pre-existing cavities, including old nest cells of other wasp species. Chalybion turanicum exhibits nest-renting behavior, nesting exclusively inside old cells of Sceliphron destillatorium. Females hunt spiders, paralyze them, and store multiple prey items per cell. Males are not involved in nest construction or provisioning.

Predators of spiders, potentially influencing local araneofauna populations. Serve as hosts for nest parasites including cuckoo wasps (Chrysididae) and other parasitoids. Some species, such as Chalybion turanicum, have become invasive in new regions.

Mud-dauber wasps are generally considered beneficial due to spider predation. Some species have become invasive in new regions; Chalybion turanicum is the seventh invasive Sphecidae species naturalized in Europe. Nesting in human structures can occasionally cause minor nuisance.

• SphecinaeAlso thread-waisted wasps in Sphecidae, but Sceliphrinae differs in nest construction (mud nests vs. burrows in soil or wood in many Sphecinae) and specific wing venation
• PemphredoninaeSimilar size and general form, but Sceliphrinae are distinguished by prey type (spiders vs. aphids and other small insects in Pemphredoninae) and nest construction materials

• BugGuide
• Wikipedia
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• The first data on the nesting biology of the invasive blue nest-renting wasp, Chalybion turanicum (Gussakovskij, 1935) (Hymenoptera, Sphecidae, Sceliphrinae) in the Crimea