Fifteen specimens of Ridgewayia marki minorcaensis n. ssp., collected
from Calan Porter Cave, Minorca (western Mediterranean) on 18 July, 19
88, are compared with closely related species. The presence elf a hith
erto undescribed structure on the basis of the right fifth leg of the
male justifies establishing a new subspecies. This is the second recor
d of this species, next to that from the Bermuda islands, and thus rep
resents an interesting geographic distribution. The presence, in the s
ame cave, of Exumella polyarthra a Fosshagen, 1970, until now found on
ly in the Bahamas, might pose the hypothesis of a relict character of
these Mediterranean populations.