Cobweb spider (White Porch spider) Cryptachaea gigantipes

Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Family: Theridiidae
Genus: Cryptachaea
Species: C. gigantipes
Binomial name: Cryptachaea gigantipes
Synonym: Theridion gigantipes
Common name: Porch spider, White porch spider

Cryptachaea gigantipes is a small cobweb spider found in Eastern Australia, Norfolk Island and New Zealand where it is an adventive species. 
It is a common spider in New Zealand and can be found in corners of walls and windows. It has a body length of about 6mm. The male has a thinner body than the female in the photos. When in sitting in its web it raises its two forelegs over its body.

The long-legged Cryptachaea gigantipes
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The body colour patterns are variable.
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Porch spider Cryptachaea gigantipes.JPG

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A female with her spiderlings.
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White porch spider Cryptachaea gigantipes-003.JPG 

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The spider's underside
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Thanks to Wikipedia for text and information