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More ID help

 
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Andy Keay



Joined: 19 Apr 2008
Posts: 6

PostPosted: Wed Aug 13, 2008 2:35 pm    Post subject: More ID help Reply with quote

These 3 were photographed on 27 Aug 2007 at Stagbury Downs [SSSI], TQ271575 - a small area of chalk grassland recently recovered from dense scrub.

I think they are

3 H. trivittatus
2 & 1 H. pendulus

Can someone confirm please

Andy
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Ben Grader



Joined: 04 Nov 2006
Posts: 23
Location: North Somerset

PostPosted: Thu Aug 14, 2008 5:07 am    Post subject: Reply with quote

All H pendulus, I think the pattern differs but the main identification is the same.
I am going by the notch on the yellow on the tergite.
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Andy Keay



Joined: 19 Apr 2008
Posts: 6

PostPosted: Thu Aug 14, 2008 6:15 pm    Post subject: Reply with quote

I think I need to study these in more detail - I was going on the differing patterns and not the notch.
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Ian Andrews



Joined: 08 Aug 2007
Posts: 180
Location: Pocklington, East Yorkshire

PostPosted: Thu Aug 14, 2008 9:14 pm    Post subject: Reply with quote

I would have agreed with the original ID. Isn't 3 trivittatus...with black right to the hind margin on tergite 2 at least, being lemony-yellow and with a neat pale grey 'w' on tergite 4. Can't see the yellow face, but it looks like the two trivittatus I found today, i think!
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Andy Keay



Joined: 19 Apr 2008
Posts: 6

PostPosted: Sat Aug 16, 2008 8:27 am    Post subject: Reply with quote

I'm confused Confused .com

I've gone back to the book and 3 still looks like trivittatus.
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Roger K.A. Morris



Joined: 06 Nov 2005
Posts: 1583

PostPosted: Sun Aug 17, 2008 9:20 am    Post subject: Reply with quote

I don't think you can go by the markings on the tergites - these are quite variable. However, there are two points that make me think that you can only say likely H. pendulus for photos 1 & 2:

1. The key character of H. trivittatus is the absence of a dark stripe on the face - you cannot see whether this is present/absent from these photographs.

2. The abdominal markings of H. trivittatus are usually lemon yellow - your specimen 3 looks right in this respect.

This illustrates the need to use the keys and to take account of the characters that have been worked out as reliable for separating the various species. I'm afraid hovers are not do-able from illustrations and there are several species that may come to the UK and get missed e.g. H. affinis.

Regards

Roger
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