~ spider sac

Circumstances have forced me back into that most cruel of tasks: selling books on Ebay. I have reassumed the identity of ‘Lampsucker’ and am diligently slaving away, as I expect to be for at least the next year.

While burrowing through my stock the other day, I found the egg sack of a spider attached to an Isabel Allende biography. Though it was slightly torn, it seemed quite full, so I investigated further, to find it was filled with tiny spherical eggs of a light green colour.



The eggs seemed to have crystallised. If you crush a crystal of sugar under the end of a spoon you are left with the same type of powder residue I was left with when I crushed one of these eggs. Only pale green instead of white.

I’m pretty certain the sac was the work of a huntsman of the holconia group – the species which most commonly inhabits houses here in Melbourne. They produce ‘a flat, oval egg sac of white papery silk, and lay up to 200 eggs’. Well there were about fifty eggs in this one, but otherwise it fits the facts. Also the ‘spiderlings are pale brown or green in colour’, so perhaps this was one of the green batches.

I was also surprised to learn that huntsmen have lifespans of about two years.



The other possibility was the dreaded white-tail (Lampona cylindrata or Lampona murina). Its saccing habits were described thus: ‘they make temporary silk retreats and spin disc-shaped egg sacs which contain as many as 90 eggs’. I saw no evidence of a silk retreat and there was nothing particularly disc-like about the sac

But I did learn something interesting.

My wife hates white-tails with a passion and is always checking Polly’s sheets for them. (They like clean linen.) Her mother, Di, was bitten once and reacted very badly, perhaps experiencing the necrosis that their bites are said to cause. I have spoken to a woman who claimed a white-tail bite caused her to lose two years of her life in the mists of chronic fatigue syndrome. Without really thinking about it, feeble sceptic that I am, I was quite prepared to believe that these spider bites could cause seeping wounds that never heal – a condition named "necrotising arachnidism". (“Occasionally, the reaction is so severe that the person loses large amounts of skin and needs extensive skin grafts.”)

It appears this is something of an urban myth or at least a vast exaggeration.

I myself first heard of white-tails around the time my wife moved in, around 2000, and it surprised me that I’d been ignorant of such a seemingly perilous threat. And apparently it has only been since the 1980s that reports of severe skin lesions have been reported.

Here are a few random quotes from the web:

A recent study has monitored the medical outcomes of over 100 verified White-tailed Spider bites and found not a single case of ulceration (confirming the results of an earlier study). www.austmus.gov.au

The University of Adelaide’s Clinical Toxinology Resources (www.toxinology.com) have an excellent run down of the venoms of all sorts of Aussie fauna and their effects. The entry on white-tails says that necrosis “does not occur, based on current clinical evidence”. bencruachan.org

Bites from these spiders have been reported to cause necrosis (decomposition of the skin). This has only been verified in 14 spider bites over the past 10 years, and none of the victims could confirm the type of spider responsible. This reaction is considered to be rare. However, bacteria on the fangs of the spiders may cause severe infection or other allergic reactions.

I’m getting the feeling that the white tail thing has been blown out of proportion. In their favour, they’re an arachnovore, hunting other spiders (like red-backs and daddy-long-legs) for food.

*

If you’ve stayed with me this long, you might be interested to know that there’s been some movement on the Save Sam’s Neck effort, coming principally from my guru to the north, Steve Kilbey. I was thinking about arranging a theatrical-style benefit, that being the scene I move in these days, but Steve’s suggested, and offered to be part of, a musical benefit.

It’s early days yet, but it will probably be in August and legendary promoter Dolores San Miguel has offered a hand. Also, unless the sky falls in, The Ears will be doing a reformation.

I’ll leave you with this still by Marc Morel from The Goitre Birds, performed at Snatches a little over a week ago.

~ a fresh infestation

Part of the advantage of having a jungle for a garden is the occasional unexpected appearance of new flora and fauna.

In recent times, there’s been unusual activity in the natural world of Mt Waverley: nightmarish earwig infestations, the rise of the native cockroaches, an invasion of revolting black caterpillars which I have been unable to identify - and now a brand new spider.

I’ll leave moot the issue of climate change, though to my mind it is certainly in play.

Like any house in this region, we have our resident daddy long legs and huntsmen, but over the last month in various rooms we have noticed, in corners, clinging to walls, a spider that looks exactly like this:



I don’t have a good enough lens to capture something as small as a spider, so I had to borrow the image.

My photo looks like this:



As you will notice, there are now two of the spiders. They are handsome-looking things, clean, having a kind of design affiliation with the stick insect.

The species is Deinopsis subrufa, the net casting spider, named after its distinctive means of snaring prey. It waits with a unique rectangular net grasped in its four front legs. When potential prey passes – either arachnoid or insectile – it casts the net to effect capture; its victims tangling themselves in the non-sticky silk or cribellate. I haven’t seen this happen, of course, but could these spiders have been feasting on the local daddy long legs, moving from room to room, methodically clearing out our age old co-inhabitants…?

These individuals are male. I have not seen any females, which seem to be almost orange in appearance…

I have not found any mention of these spiders colonising the inside of houses. Have they been forced inside, I wonder, or is this an isolated occurrence? Whatever the case, who could be anything but proud to share his domicile with such a charismatic lifeform?