vulva is more characteristic of westlandicum than of tuberculatum. In both specimens the pygidium is very slightly pilose. The only male specimen in the series is from Salisbury's Clearing. It is very close to the nominate subspecies in the form of the telopods and tergites, but the pygidium is rather pilose. Only 1 hybrid is from the western side of the Tableland, namely from Leslie River Track. This specimen has the pygidium and vulva of tuberculatum but the tergite sculpturing is typical of westlandicum. The lower reaches of the Karamea River, and the Leslie River Valley, would possibly provide an easy migration route on to the Tableland for westlandicum. Localities for P. tuberculatum tuberculatum × tuberculatum westlandicum. Salisbury's Opening, Mt. Arthur Tableland, 23.1.1948, R. R. Forster, 1 ♂, 1 ♀ (D. M.8/20, 8/21); Salisbury's Clearing, Mt, Arthur Tableland, 23.1.1948, R. K. Dell, 8 ♀ (D.M 8/112–117, 8/119, 8/120); Flora Track, Mt. Arthur Tableland, 7.4.1946, R. R. Forster, 1 ♀ (D.M. 8/71); Leslie River Track. Mt Arthur Tableland, 24.1.1948, R. K. Dell, 1 ♀ (D.M. 8/72). Procyliosoma (Procyliosoma) delacyi delacyi (White, 1859), Figs. 42–50. 1859. Zephronia (Sphaerotherium) De Lacyi White, Ann. Mag. Nat. Hist., ser. 3, III: 406, Pl VIII, Figs. 2, 2a. 1873. Sphaerotherium de lacyi Butler, Proc. Zool. Soc. London: 177. 1895. Cyliosoma de lacyi Pocock, Ann. Mag. Nat. Hist., ser. 6, XVI. 415. 1885. Sphaerotherium novae-zealandiae Kirk, Trans. N. Z. Inst., XVIII. 139–40, Figs. 1–3. Colour (in alcohol) light brown-olivaceous In some specimens all or some of the tergites marbled or spotted with black Male width up to 8 mm. length up to 15 mm female width up to 9 mm, length up to 17 mm. Head with coarse setiferous pits moderately dense in front, sparse on the vertex Eye as in Fig. 42. very large, compact, raised well above the surface of the head, composed of about 60 subequal ocelli arranged more-or-less in rows. Collum finely reticulate with dense small pits, a few widely spaced long setae just inside the posterior margin Surface of 3rd to 11th tergites as in Fig. 44, finely reticulate, with scattered small pits up to 0.03 mm in diameter and much larger saucer-shaped pits (up to 0.25 mm in diameter) mainly on the anterior half Shield as in Fig. 43, finely and densely punctulate, with a few large setiferous pits scattered over the surface but not along the posterior margin. Brim fairly wide; declivity steep, with 7 to 9 narrow keels which arise from a rounded rim at the top of the declivity; furrow deep with a row of setae extending into the brim. Pygidium wide, much shorter dorso-ventrally than the other tergites, not descending steeply; margin thickened and raised like the edge of a bell. On each side a shallow emargination separates off from the rest of the pygidium an anterior section about the width of the 12th tergite. Posterior margin of the male with or without a shallow median emargination. Underside of pygidium pilose, and on each side a small brown knob, with a very short, wide longitudinal keel immediately posterior to it. A much reduced keel on the underside of the 4th to 12th tergites. Leg as in Fig. 45, long and slender. Coxa with the distal outer angle produced into a flattened semicircular lobe which has its margin serrate; lobe with 1–7 submarginal setae. 3rd segment long and slender. Distal inner margin of 5th segment with or without a small brown spine. 6th segment long, slender, tapering distally, usually more than 4 times longer than wide; 8 to 11 lower spines; upper spine present or absent; claw with a rounded tooth at the base. 2nd leg of the female as in Fig. 46 6th segment about 4 times longer than wide; upper and lower spines as in other legs Vulva elongate-oval, not very hairy: distal lamina triangular, surface depressed proximally; proximal lamina not greatly larger than internal lamina. Anterior telopods as in Figs. 47 and 48. Syncoxal segment with a few setae. 1st segment of telopodite wider than 2nd, rather hairy, distal half of outer edge blade-like. 2nd segment wide at the base, outer proximal edge blade-like: 1 to 3 very long setae arising near the proximal internal margin on the aboral surface Fixed finger minute, wedge-shaped, with 0 to 3 spines near the base, 0 to 3 hairs; tip faintly crenulate Movable finger short, broad, with very few hairs; distal margin truncate with 5 to 8 ridged teeth. Concave surface with 2 spines. The movable and fixed fingers do not form pincers. Posterior telopods as in Figs. 49 and 50. Syncoxite robust, hairy distally. Horns and funnels very short and wide Bristle lobes small and rounded Telopodite massive. 1st segment with a few hairs. 2nd segment covered with short, fine hairs, hairs rather sparse on outer margin; 2 or 3 long setae on the aboral surface near the base of the fixed finger. Fixed finger short, thick, with a tract of fine, short hairs and 0 to 2 spines on the adoral surface; papilla large.