Snake-back Spider - Segestria senoculata

This is an attractively marked spider which gets the English name from the row of dark coloured patches on the elongated abdomen said to resemble the markings on some poisonous snakes, such as the adder. Males 6.5-7.5mm, females 7-10mm. Prosoma blackish, lighter behind, opisthosoma light grey brownish spotted with black, dorsally with a median lobed black band, ventrally without band. 

Good photographs required. 

Lives in a tube constructed in a hole in a wall, under bark and stones or in rubble and scree, from sea-level to high altitudes. Frequent in woodland. 

All year round, peaking from March to October.

This is a tube dwelling spider.

Widespread and fairly frequent.

Status in Leicestershire and Rutland not known.

3,244 British records for this species to 2015.