Baccha
Fabricius, 1805
Species Guides
1- Baccha cognata(American Dainty)
Baccha is a of hoverflies in the Syrphinae, characterized by extremely slender, club-shaped . range from 7 to 10 mm in length and exhibit -like body proportions with clear or faintly marked wings. The genus is distinguished by its distinctive elongate body form among syrphine flies.
Pronunciation
How to pronounce Baccha: //ˈbak.kʰa//
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Identification
The is immediately recognizable by its extremely slender, club-shaped —at least 25 times as long as its narrowest width. The combination of short, yellow to black with scape at least as deep as long; widely separated upper and lower katepisternal hair patches; complete postmetacoxal bridge; and absence of posteromedial hair tuft on hind provides additional diagnostic characters. Wing venation with alula much narrower than c at its base and reduced anal angle is also distinctive.
Images
Distribution
Records from Denmark (DK), Norway (NO), Sweden (SE), Vermont (US), and other US locations. The has a Holarctic distribution pattern based on available records.
Ecological Role
Larvae are predatory, often on aphids, suggesting a role in of .
Similar Taxa
- Other Syrphinae generaBaccha is distinguished by its extremely slender, club-shaped with length-to-width ratios of 25× or greater, much more elongate than typical hoverflies.
- SphaerophoriaSphaerophoria have slender but lack the pronounced club shape and extreme elongation of Baccha.