Triepeolus intrepidus

(Smith, 1879)

Intrepid Longhorn-Cuckoo

Triepeolus intrepidus is a of cleptoparasitic in the , tribe Epeolini. It is found in the United States and Mexico. Like other members of its , it is a nest of other , likely targeting long-horned bees (Melissodes and related genera). The species was originally described as Epeolus intrepidus by Smith in 1879.

Pronunciation

How to pronounce Triepeolus intrepidus: //traɪˈɛpi.oʊləs ɪnˈtrɛpɪdəs//

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Identification

Triepeolus are distinguished by their : -like, often with bold black-and- or black-and- patterning, reduced (pollen- hairs) on the hind legs, and relatively sparse body hair compared to their . Specific identification of T. intrepidus requires examination of subtle morphological characters including details of the clypeal punctation, proportions, and male . The Triepeolus is separated from the related Epeolus by features of the and male genitalic structure.

Habitat

Found in areas where occur, including grasslands, prairies, and open with suitable floral resources. Observed foraging on gumplant (Grindelia camporum) and other Asteraceae in California.

Distribution

United States and Mexico. Specific state records include California.

Diet

forage for nectar at flowers. As a , females do not collect pollen; consume the pollen stores and provisions gathered by .

Host Associations

  • Melissodes - probable Triepeolus are typically of long-horned (Eucerini), particularly Melissodes and related . Specific records for T. intrepidus are not confirmed in available sources.

Life Cycle

As a cleptoparasitic , females enter nests and lay in provisioned by the host. The Triepeolus consumes the host's pollen provision and often kills the host egg or larva. Development occurs within the host's sealed brood cell.

Behavior

have been observed foraging on flowers, including gumplant. Females exhibit nest-searching to locate nests. Males may be found sleeping on vegetation or flowers.

Ecological Role

Acts as a (nest ) of solitary , regulating bee . Contributes to through nectar foraging.

Human Relevance

Contributes to diversity and function. May be encountered in gardens and native restorations. Not a managed pollinator or agricultural pest.

Similar Taxa

  • EpeolusClosely related in the same tribe Epeolini; historically T. intrepidus was described under Epeolus. Distinguished by details and male .
  • Triepeolus concavusAnother Triepeolus found in western North America; distinguished by subtle morphological differences in punctation and male .
  • SphecodesSweat cuckoos with similar cleptoparasitic lifestyle, but in ; typically smaller with different and often reddish coloration.

More Details

Original Description

First described by Frederick Smith in 1879 as Epeolus intrepidus, later transferred to Triepeolus.

Nomenclatural Note

The basionym Epeolus intrepidus reflects the historical taxonomic placement before the Triepeolus was recognized as distinct from Epeolus.

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Sources and further reading