Centromerita bicolor

Size 3.0 to 3.5 mm. Carapace and legs unicolourous brown to dark brown. Male head with a number of forward directed spines, fewer in females. Abdomen brown to dark brown. If brown then the abdomen has the same colour as the carapace and legs. If dark brown then the abdomen is darker than the carapace and legs. 

• Tibial spines: 2-2-2-2;
• TmIV: no;
• TmI: 0.40-0.53. 

Identification of this species requires microscopic examination of the genitalia of mature specimens. 

Occurs in a wide range of habitats, including grasslands, heathland, bog, hedgerows, wasteland and allotments, but perhaps especially in improved and disturbed grasslands and other places with areas of open ground. 

All year. 

Common.

Common.

http://srs.britishspiders.org.uk/portal.php/p/Summary/s/Centromerita+bicolor

http://srs.britishspiders.org.uk/resource/Identification-Centromerita-bicolor-concinna.pdf