Genus Acanthomurus Womersley.
Acanthomurus alpinus Salmon, 1941.
This species, previously known only from the South Island mountain regions, can now be recorded from the North Island at Mt. Hector, Tararua Range, under moss and stones and under the bark of old logs 2000–3000 ft. altitude (Coll. R. Forster); Day's Bay, Wellington, amongst leaf mould in bush 500 ft. altitude (Author's Coll.).
Acanthomurus alpinus subspec. obscuratus nov. Plate 41, fig. 34.
This subspecies differs from the principal species only in colour. The whole of the ventral surface is coloured a deep-bluish violet, and this colouring extends up the sides to meet broad bands of similar colour which pass around each segment in positions corresponding with the dark markings of the principal form. Antennae and legs deep-violet, darker at the extremities.
Locality: Days Bay, Wellington, amongst leaf mould in bush 500 ft. altitude (Author's Coll.).
Type: Slide 3/1235 Dominion Museum Collection.