A. sticticum is the spelling used in McDermott's catalogue of Lampyridae. The genus name Aspisoma is neuter (it's a Greek word), so the species names that are adjectives generally end in -um (gender agreement rule). A. sticticum seems to be an adjective word, originally proposed as a replacement name for the preoccupied A. maculatum.
A. stictica is therefore an invalid emendation.