Triepeolus intrepidus

(Smith, 1879)

Intrepid Longhorn-Cuckoo

Triepeolus intrepidus is a of cleptoparasitic cuckoo bee in the Apidae, tribe Epeolini. It is found in the United States and Mexico. Like other members of its , it is a nest of other bees, 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 cuckoo bee : -like, often with bold black-and-white or black-and-yellow patterning, reduced scopae (pollen-collecting 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, flagellomere proportions, and male genitalia. The Triepeolus is separated from the related Epeolus by features of the wing venation and male genitalic structure.

Habitat

Found in areas where bees 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; larvae consume the pollen stores and provisions gathered by bees.

Host Associations

Life Cycle

As a cleptoparasitic , females enter nests and lay in provisioned by the host. The Triepeolus larva 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 bees, regulating . Contributes to pollination through nectar foraging.

Human Relevance

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

Similar Taxa

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