Argosarchus horridus, White (1846).

A. spiniger, White, ♂; B. filiformis, Colenso, ♂; B. gerhardii, Kaup, ♀.

This well-known species was represented in the collection from the Great Barrier Island by one male and one female, which have the following dimensions : Length of the body, ♀ 128mm., ♂ 95mm.; of mesothorax, ♀ 28mm., ♂ 21mm.; of metathorax, ♀ 25 mm., ♂ 19 mm.; of abdomen, ♀ 64 mm., ♂ 49 mm.; of antennæ, ♀ 29 mm.; ♂ 29 mm.; of anterior femur, ♀ 36 mm., ♂ 24 mm.; of middle femur, ♀ 26 mm., ♂ 20 mm.; of posterior femur, ♀ 26 mm., ♂ 19 mm. The bases of all the femora are pale in colour, more broadly so in the male than in the female.

It is found throughout New Zealand, as far south as the West Coast Sounds of Otago.