Males 2.5 to 3 mm, females 3.5 to 4.5 mm. Prosoma yellowish-brown, eye region and a broad stripe on margin darker, almost black. A black line between dorsal groove and eye region. Sternum yellowish-white, with dark spots. Legs yellowish, annulated with red-brown to black. Opisthosoma with one pair of tubercles dark, reddish and grey on yellow background.

Other Ero species. 

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters. Photographs must show the two abdominal tubercles and characteristic pattern on the sternum. 

On vegetation.

Spring to Autumn.

Widespread and fairly frequent in Britain.

Fairly frequent and probably under recorded in our area.

http://srs.britishspiders.org.uk/portal.php/p/Summary/s/Ero+furcata