small and transversely elliptical, and is produced below and front of the eyes into small rounded projections. Last six segments of thorax of about equal lengths, and shorter than the first; last three with the postero-lateral angles acute, produced. Abdomen much narrower than the thorax, and narrowing considerably posteriorly; lateral margins nearly straight; last segment subtriangular, with apex truncate; posterior margin, and the posterior portions of the lateral margins, perfectly straight. Surface smooth and shining, apparently with very short setae at intervals. Colour, mostly black, or very dark brown, with markings of light yellow or white.

Inner antenna small, but able to be seen in dorsal view. Outer antenna, with the first three joints increasing in length; third, as long as the first and second together; fourth, half as long again as the third, and about three-fourths as long as the fifth. Third stouter than the fourth, which is stouter than the fifth. Flagellum as long as the fifth joint, and tapering gradually; clearly divided into five joints, and the last, which is longer than any of the others, bears indistinct marks as if divided into two, the extremity bearing a pencil of straight setae. Whole antenna, thickly covered with very fine setae, and having larger setae at the distal ends of the second, third, and fourth joints. Thoracic legs, increasing considerably in length posteriorly, bearing many long, stiff setae, particularly on the carpus, near the distal end of which the longest is situated. Dactylos bearing a peculiar seta longer than the dactylos itself; it is stout at base, and soon splits up into two brauches of about equal size; the branch remote from the dactylos giving off numerous sub-branches on the side near the dactylos; the other branch splitting into several branches, which still further subdivide towards the end, and are thickly covered with very short setae.

Length: 3 inch.

Hab.—Spar bush, Southland.

I have named this species after Mr. G. M. Thomson, from whom I have received much kind assistance.

In general appearance, and in the form of the outer antenna, it differs considerable from the species common in many parts it differs considerably from the species common in many parts of the South Island, which I have previously identified with Philygria rosea, and it is much larger than the ordinary specimens o this species; though I have one specimen of P. rosea from Kinloch, Lake Wakatipu, quite as large as any of my specimens of P. thomsoni. In some details, however, I find the two are strikingly alike. This is particularly the case with the