Diptera.info :: Identification queries :: Diptera (adults)
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 Which Bibio? (06.05.22) --> B. johannis
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| Juergen Peters |
Posted on 07-05-2022 18:38
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 Member Location: northwest Germany Posts: 14250 Joined: 11.09.04 |
Hello, are these two Bibio males (ca. 8 mm) the same species? Yesterday at housewall and at a hedge near forest (northwest Germany). Juergen Peters attached the following image:  [87.79Kb] Edited by Juergen Peters on 09-05-2022 23:11 Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| Juergen Peters |
Posted on 07-05-2022 18:39
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Member Location: northwest Germany Posts: 14250 Joined: 11.09.04 |
Second specimen.
Juergen Peters attached the following image:  [139.93Kb] Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| eklans |
Posted on 08-05-2022 07:56
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Member Location: Franconia, Germany Posts: 4179 Joined: 11.11.18 |
Hi Jürgen, yes - these are the same species - and I think it's B. johannis.
Greetings, Eric K |
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| Juergen Peters |
Posted on 09-05-2022 02:32
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Member Location: northwest Germany Posts: 14250 Joined: 11.09.04 |
eklans wrote:yes - these are the same species - and I think it's B. johannis. Thanks, Eric! But are you sure? Bibio johannis normally flies in March and early April here (I have seen some in the first April week). After a while with no Bibionids there are now several other species flying. Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| eklans |
Posted on 09-05-2022 07:55
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Member Location: Franconia, Germany Posts: 4179 Joined: 11.11.18 |
Hi Jürgen, I think they are, based on this information (the dark stripe on tibia III is visible on the 2nd image): on male Bibio johannis: Een veldtabel voor de inheemsezwarte vliegen (Bibionidae) door Theo Zeegers, 1997 mid April - mid May, antennae: 9 segments, metatarsus slightly thickend, approx. length = width x 3 (excerpt translated by eklans) BIBIONIDAE DE LA FAUNE BELGE, Jan Verbeke, 1971 wings hyaline, strong brown stigma flagellum 7 segments body black, black hairs - including occiput tibia III yellow, gradually thickened from base to tip, rear surface with brown stripe metatarsus III thickend legs I & II predominantly reddish brown to brownish tibia II yellowish - legs sometimes completely yellowish (excerpt translated by eklans) Suomen karvasääsket ja maasääsket (Diptera, Bibionidae ja Pleciidae), Antti Haarto, 2012 Antennae with 9 segments. Colour of hind femora varies from totally yellow to largely dark brown. Hind tibia yellow and evenly broadened towards its apex. Hind tibia with dark stripe of sensillae Dark specimens have black femora and brown tibia and therefore the dark stripe of sensillae does not differentiate. Tarsi yellow. Greetings, Eric K |
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| Juergen Peters |
Posted on 09-05-2022 19:02
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Member Location: northwest Germany Posts: 14250 Joined: 11.09.04 |
Thanks a lot, Eric!
Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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