Baccha

Baccha
	Baccha elongata Female
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Diptera
Family:	Syrphidae
Subfamily:	Syrphinae
Tribe:	Bacchini
Genus:	Baccha; Fabricius, 1805[1]
Type species
	Syrphus elongatus; Fabricius, 1775[2]
Species
	see text;

Baccha is a genus of hoverflies in the subfamily Syrphinae. They are typically moderate sized with wasp-like bodies. Their larvae are predatory, often on aphids.[3][4][5]

Description

This genus is extremely slender with a club shaped abdomen that is at least 25 times as long as its narrowest width They range in length from about 7 to 10 mm. The wings are either clear or have very faint brownish markings, have an alula that is much narrower than cell c at its base, a reduced anal angle, and small bare spots near the base, with faint clouding along The apical crossveins. The eyes have very short and sparse hairs, while its frons and face are mostly pollinose and black. The antennae are yellow to black and very short, with the scape at least as deep as it is long. The thorax has short hairs on its scutum, which is mostly shining lightly pollinose above and on the sides, which are either entirely black or with a few yellow margins. The scutellum is similarly colored, but with pile only as a fringe laterally. On the pleural area the anterior anepisternum, meron, metapleuron, and metasternum are all bare. The upper and lower katepisternal hair patches are widely separated. The postmetacoxal bridge is complete. There is also no posteromedial apical hair tuft on the hind coxa. In the male, the abdomens are about 40 times longer than the shortest width of segment 2, while female abdomens are 25 or more times longer than the shortest width of segment 2. In addition to being dark brown to black in color throughout in most specimens, there are reddish hues towards the apex for some females, as well as yellow spots or bands appearing on tergites 2-5, which vary by species. [6][7] (see these two references for keys to the genera)

Species

B. bistriatus Kohli, 1987
B. elongata (Fabricius, 1775)[2][6]
B. euryptera Violovitsh, 1976
B. laphrieformis Violovitsh, 1976
B. maculata Walker, 1852
B. nana Violovitsh, 1976
B. okadomaei Violovitsh, 1976
B. optata Violovitsh, 1976
B. perexilis Harris, 1776
B. sachalinica Violovitsh, 1976
B. shirakii Violovitsh, 1976
B. sibirica Violovitsh, 1976
B. strandi Duda, 1940

References

Fabricius, Johann Christian (1805). Systema antliatorum secundum ordines, genera, species. Bransvigae: Apud Carolum Reichard. pp. i–xiv, 1–373. Retrieved 5 June 2020.
Fabricius, J.C. (1775). Systema entomologiae, sistens insectorum classes, ordines, genera, species, adiectis synonymis, locis, descriptionibus, observationibus. Flensbvrgi et Lipsiae [= Flensburg & Leipzig]: Kortii. pp. [32] + 832. Retrieved 20 February 2021.
"Tribe Syrphini".
Stubbs, Alan E.; Falk, Steven J (1983). British Hoverflies: An Illustrated Identification Guide (2nd ed.). London: British Entomological and Natural History Society. pp. 253, xvpp. ISBN 1-899935-03-7.
Van Veen, M.P. (2004). Hoverflies of Northwest Europe, Identification Keys to the Syrphidae. Utrecht: KNNV Publishing. p. 254. ISBN 90-5011-199-8.
Vockeroth, J. R. (1992). The Flower Flies of the Subfamily Syrphinae of Canada, Alaska, and Greenland (Diptera: Syrphidae). Part 18. The Insects and Arachnids of Canada (PDF). Ottawa, Ontario: Canadian Government Pub Centre. pp. 1–456. ISBN 0-660-13830-1. Archived from the original (PDF) on 2013-06-15. Retrieved 2013-06-26.
McAlpine, J.F. (1981–1989). Manual of Nearctic Diptera (PDF). [Ottawa]: Research Branch, Agriculture Canada. ISBN 978-0660121253.

[1]

Violovitsh, N.A. (1976). "Survey on species of genus Baccha Fabricius, 1805 (Diptera, Syrphidae) from the Palaearctic fauna". Nov. Mal. Vidy Faun. Sibir. (in Russian). 10: 130–154.

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[Fabricius1805-1] Fabricius, Johann Christian (1805). Systema antliatorum secundum ordines, genera, species. Bransvigae: Apud Carolum Reichard. pp. i–xiv, 1–373. Retrieved 5 June 2020.

[Fabricius1775-2] Fabricius, J.C. (1775). Systema entomologiae, sistens insectorum classes, ordines, genera, species, adiectis synonymis, locis, descriptionibus, observationibus. Flensbvrgi et Lipsiae [= Flensburg & Leipzig]: Kortii. pp. [32] + 832. Retrieved 20 February 2021.

[3] "Tribe Syrphini".

[Stubbs-4] Stubbs, Alan E.; Falk, Steven J (1983). British Hoverflies: An Illustrated Identification Guide (2nd ed.). London: British Entomological and Natural History Society. pp. 253, xvpp. ISBN 1-899935-03-7.

[VanVeen-5] Van Veen, M.P. (2004). Hoverflies of Northwest Europe, Identification Keys to the Syrphidae. Utrecht: KNNV Publishing. p. 254. ISBN 90-5011-199-8.

[Vockeroth-6] Vockeroth, J. R. (1992). The Flower Flies of the Subfamily Syrphinae of Canada, Alaska, and Greenland (Diptera: Syrphidae). Part 18. The Insects and Arachnids of Canada (PDF). Ottawa, Ontario: Canadian Government Pub Centre. pp. 1–456. ISBN 0-660-13830-1. Archived from the original (PDF) on 2013-06-15. Retrieved 2013-06-26.

[mcalpinemnd-7] McAlpine, J.F. (1981–1989). Manual of Nearctic Diptera (PDF). [Ottawa]: Research Branch, Agriculture Canada. ISBN 978-0660121253.

[8] Violovitsh, N.A. (1976). "Survey on species of genus Baccha Fabricius, 1805 (Diptera, Syrphidae) from the Palaearctic fauna". Nov. Mal. Vidy Faun. Sibir. (in Russian). 10: 130–154.