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Strange looking Muscidae

I saw a large number of these flies while on holiday recently. They appear to be very effective hunters of other small flies / flying insects as I spotted quite a few with prey. This one has caught a Nematocera of sorts. The fly has been identified on Diptera.info as Anaphalantus longicornis (Muscidae) and according to a previous discussion which I append here it is the only Anaphalantus in the region. I photographed three specimens and it would appear they are all females. The males have interesting tufts of hair on their front legs. Had I known about this I would have photographed more to find a male. Never would have guessed this is Muscidae though. See here: http://diptera.info/forum/viewthread.php?thread_id=38374&pid=169642

Steatoda triangulosa

The 10th Annual National Capitol Parks BioBlitz
Held by The National Park Service and National Geographic
This particular location was at Dyke Marsh, where the focus was on spiders
20-21 May 2016