Wikipedia
Diguetia
Diguetia is a genus of six-eyed spiders. They occur in the United States and Mexico, with the exception of one Argentinian species.
Diguetia, which is common throughout the southwestern USA, builds an unusual tent-like web, often between cacti, somewhat resembling the webs of Linyphiidae. They build a tubular retreat at the tip, which they camouflage with leaf litter or similar substances. The thin egg sacs are positioned inside this retreat.
The most common species in the United States are Diguetia canities and the smaller D. albolineata.