arachnologically

The district of Hanover, he said, and indeed, practically, the whole high Karoo plateau, was unexplored arachnologically;

1903, S. C. Cronwright Schreiner, “Some Arachnids at Hanover, Cape Colony”, in The Popular Science Monthly, New York, N.Y.: The Science Press, page 145

Arachnologically Filey is almost terra incognita.

1922 July 1, The Naturalist, page 208

The following Monograph gives an account of the Drassid spiders of South Africa. The term South Africa is meant to apply to the region south of the 15° latitude and not to political South Africa. Even so, the boundary is an artificial one arachnologically, for, as far as can be seen from the distribution of the species at present known, certain Cape Province species occur in South-West Africa, and others spread northwards to the East African equatorial region, and certain Abyssinian species spread south to the same region.

1923, R. W. E. Tucker, “The Drassidae of South Africa (Arachnida)”, in Annals of the South African Museum, volume XIX, page 251

It would be natural to compare at first the spider faunas of Newfoundland and Labrador, but unfortunately this part of Canada is very little known arachnologically.[…]The areas compared are, of course, of different size and studied arachnologically in different degrees.

1954, Acta Zoologica Fennica, pages 33 and 42

Mention must also be made of those investigations into each regional spider fauna conducted not by individuals as in the past but by museums of natural history, research institutes for natural resources, universities and colleges on a large scale and in areas hitherto unexplored arachnologically.

1957, Takeo Yaginuma, “A Historical Review of Studies on Japanese Spiders”, in Acta Arachnologica, page 47