Systoechus oreas
Osten Sacken, 1877
Systoechus oreas is a of in the . It is known from western North America, with records from British Columbia, Canada and the western United States. The are of , a trait that distinguishes this species ecologically from many other bee flies. are active in the fall, in contrast to the spring-active members of the related Bombylius.
Pronunciation
How to pronounce Systoechus oreas: /sɪsˈtoʊɛkəs ˈɔːriəs/
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Identification
Systoechus oreas can be distinguished from the related Bombylius by the position of the r-m on the . Members of Systoechus are generally active as in the fall, whereas Bombylius tend to be active in spring. The genus Systoechus is part of the tribe Bombyliini within the Bombyliinae.
Habitat
Found in sand prairie remnants and open sandy in western North America.
Distribution
British Columbia, Canada and the western United States.
Seasonality
are active in the fall.
Diet
are of . diet not specifically documented for this ; many feed on nectar.
Life Cycle
Larval stage develops as a of . Details of egg placement, , and not documented.
Behavior
are skittish and difficult to approach, a trait common to many .
Ecological Role
Larval of , potentially contributing to grasshopper .
Similar Taxa
- Bombylius mexicanusSimilar appearance and ; distinguished by (position of r-m ) and activity season (spring for Bombylius, fall for Systoechus).
- Other Systoechus speciesShare the -level characteristics of fall activity and pattern; specific distinctions require detailed examination.