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Index of Subjects
Index of Subjects Hi Chris and others, A couple of weeks back we visited the cliffs at Halls Harbour and again encountered a distinctive, quite large, greenish banded dolichopodid (Dolochopdidae, long-legged flies), and this time I took some photos. The fly is about 7 mm long, head to abdomen tip, is common and populates only the fresh water "seeps" that run out of the cliffs at frequent points. The male has wing-tips that are particularly distinctive (black with a small round clear "eyepot", and are presumably species-diagnostic (image 33, on site below)). Apart from the occasional concertina-legged nematoceran fly (may be a tipulid but not identified), the only other obvious insects present in this demanding and species-poor habitat are bristletails. These are currently common, but too big in August to be the likely prey of this fly -- many dolichos are predacious on smaller insects. I also have some rather murky pics of dipteran larvae up to 15 mm long associated with the green filamentous algae in the same water seeps at the same time, that possibly could be larvae of the same species. I've put two cropped photos of a live female dolicho on the cliff face, and one of a pinned male on the Flickr site below, and would appreciate a guess at the ID from Chris or anyone else who might have seen it before and is reading this. If interested please take a look at the last 3 images I uploaded (called 04), 06) and 33)) on this site: www.flickr.com/photos/steve_1968 There are many species of _Hydrophorus_, a dolichopodid genus which looks a likely candidate, but I've not found an image on Bugguide.net or elsewhere so far that resembles this species. Has anyone noticed it before or have any idea as to the ID? Steve Shaw Chocolate Lake, Halifax
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Index of Subjects