Cryptocheilus terminatus subopacus

Distinguishing Cryptocheilus terminatus subopacus from other Cryptocheilus species and from other spider wasp genera requires examination of specific morphological characters. The subspecies name "subopacus" suggests a difference in luster or coloration from the nominate subspecies, likely involving reduced shine or more matte integument. Separation from the widespread C. terminatus terminatus would depend on geographic location and subtle coloration differences. Field identification to subspecies level is generally not possible without specimen examination and comparison with type material.

Documented from a disturbed, vacant lot in an urban setting in Colorado Springs, where individuals were associated with a flowering Saltcedar (Tamarix sp.) tree. This invasive tree species creates a localized nectar resource in an otherwise sparse environment. The habitat was characterized as dry, with the tree's deep taproot accessing groundwater.

Known from Colorado Springs, Colorado, USA, based on observational records. The subspecies likely has a broader distribution in the western United States, but precise range boundaries are not established in the provided sources.

Active in mid-June in Colorado Springs; specifically observed on June 12 and June 20, 2012.

Adults have been observed visiting flowers for nectar. Males are presumed to establish territories around nectar sources to intercept females, a behavior documented in related spider wasp species at the same location, though not explicitly confirmed for this subspecies.

As a member of Pompilidae, likely functions as a predator of spiders, potentially influencing spider population dynamics. Adult nectar-feeding contributes to pollination of visited flowers, though this is incidental rather than obligate.

Documented as part of a diverse wasp community attracted to an invasive plant species, contributing to understanding of how non-native plants may alter local insect communities. No direct economic or medical significance is documented.

• Cryptocheilus terminatus terminatusNominate subspecies; distinguished by subtle differences in coloration and luster, with subopacus being less shiny or more matte
• Other Cryptocheilus speciesGenus-level characters include body form and color pattern, but species-level identification requires detailed examination
• Hemipepsis ustulataLarger tarantula hawk found at same location; distinguished by greater size, different coloration (often orange wings), and more robust build

• Pompilidae
• spider wasp
• Colorado
• nectar-feeding
• Tamarix
• invasive plant association

• BugGuide
• Bug Eric: Wasp Wednesday: The Wasp Tree Part II
• Bug Eric: Wasp Wednesday: Wasp City