Ballus chalybeius is mostly a southern species in Britain and is not particularly common. In the Southwest, the only records west of Bristol are from two hectads in south Devon, and a single record from a serpentine quarry at Spernic Cove on the Lizard Peninsula in Cornwall where the species was collected on 15 April 1968 (the green dot). The ERCCIS record (the blue dot) simply refers to the 'Lizard Peninsula' and is almost certainly the Spernic Cove record with an inaccurate grid reference.
     The Spider Atlas gives the preferred habitat of this species as woodland! It is possible that the specimen(s) from Cornwall represent a new species as the site at Spernic Cove is atypical for Ballus chalybeius. A spider survey at the quarry at Spernic Cove might be very rewarding.

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