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<DIV>Dear Kurt,</DIV>
<DIV> </DIV>
<DIV>To prove that Syrphidae species are introduced by man in new areas of
course is very difficult. You never know how wind might disperse them over vast
distances. For instance there are records for from land of Syrphidae on oil
drill platforms or light ships. However, there is quite some knowledge on
species being moved by humans and on species occuring at places were it is
almost obvious humans will have introduced them.</DIV>
<DIV> </DIV>
<DIV>There is a paper by Osten Sacken (1905) on the invasion of Eristalis tenax
in the New World. Probably E. tenax is also introduced in Australia.</DIV>
<DIV>Also Eristalis arbustorum might be an introduced species in North America.
Jeff Skevington is studying the recent replacement of Eristalis brousii by E.
arbustorum. I do not know if he published something already.</DIV>
<DIV>There are several papers on Eumerus introduced in North America. >From one
of the species, E. narcissi, its origin is not known until know. This species
very recently also arrived in Europe (Speight et al, 2013).</DIV>
<DIV>Also introduction of Eristalinus aeneus in North America is probably helped
by humans.</DIV>
<DIV>Cheilosia caerulescens and C. semifasciata are very often found in their
host plants in plant shops in the Netherlands. Of course Menno is right you
cannot prove that they only have been introduced by man, but at least part of
the Dutch populations are human introductions.</DIV>
<DIV>Episyrphus balteatus now a days is used to prey on aphids in greenhouses in
the Netherlands. I do not know whether it is used outside its natural
range.</DIV>
<DIV> </DIV>
<DIV>Best wishes</DIV>
<DIV> </DIV>
<DIV>Wouter</DIV>
<DIV> </DIV>
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<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A
title=syrphidae@lists.nottingham.ac.uk
href="mailto:syrphidae@lists.nottingham.ac.uk">Hoverfly discussion list</A>
</DIV>
<DIV><B>Sent:</B> Friday, December 05, 2014 10:48 AM</DIV>
<DIV><B>To:</B> <A title=syrphidae@lists.nottingham.ac.uk
href="mailto:syrphidae@lists.nottingham.ac.uk">Hoverfly discussion list</A>
</DIV>
<DIV><B>Subject:</B> [Syrphidae] Re: introduced Syrphidae ?</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV dir=ltr>There have also been occasional introductions of at least four
other Merodon species besides M. equestris with flower bulbs in the Netherlands,
but those have not resulted in established populations. One of these species, M.
avidus, was found repeatedly at a few locations for a number of subsequent
years, but eventually disappeared again. For more information about this, see
the book "De Nederlandse zweefvliegen".<BR> <BR>
<DIV>
<HR id=stopSpelling>
Date: Fri, 5 Dec 2014 10:30:42 +0100<BR>To:
syrphidae@lists.nottingham.ac.uk<BR>From:
syrphidae@lists.nottingham.ac.uk<BR>Subject: [Syrphidae] Re: introduced
Syrphidae ?<BR><BR>Dear Kurt,
<DIV> </DIV>
<DIV>Copestylum melleum from Mexico to the Canary Islands, pdf is
attached.</DIV>
<DIV> </DIV>
<DIV>Best wishes</DIV>
<DIV> </DIV>
<DIV>Thomas</DIV>
<DIV> </DIV>
<DIV></DIV><PRE>This message and any attachment are intended solely for the addressee and may contain confidential information. If you have received this message in error, please send it back to me, and immediately delete it. Please do not use, copy or disclose the information contained in this message or in any attachment. Any views or opinions expressed by the author of this email do not necessarily reflect the views of the University of Nottingham.
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<DIV></DIV>
<DIV>
<DIV>
<DIV>Am 05.12.2014 um 10:17 schrieb Hoverfly discussion list:</DIV><BR
class=ecxApple-interchange-newline>
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<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif">Dear all,</DIV>
<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif"> </DIV>
<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif">Does anyone
have any idea which syrphid species have been introduced elsewhere? I only
know of Ornidia obesa and (possibly?) Eristalis tenax. I could not find
records of other introductions but would very much appreciate any other report
on introduced Syrphidae.</DIV>
<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif"> </DIV>
<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif">Many thanks in
advance!</DIV>
<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif">Kurt</DIV>
<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif"> </DIV>
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<DIV><SPAN class=ecxApple-style-span style="FONT-FAMILY: helvetica">Dr. Thomas
Romig</SPAN><SPAN class=ecxApple-style-span
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http://lists.nottingham.ac.uk/mailman/listinfo/syrphidae</DIV></DIV><PRE>This message and any attachment are intended solely for the addressee and may contain confidential information. If you have received this message in error, please send it back to me, and immediately delete it. Please do not use, copy or disclose the information contained in this message or in any attachment. Any views or opinions expressed by the author of this email do not necessarily reflect the views of the University of Nottingham.
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