Hemideina speluncæ, n. sp.
Colour: body beneath light ochreous; pronotum, both anterior and posterior edges broadly banded with black, mesonotum and metanotum also having a black band close to posterior margin, but all the thoracic and abdominal segments have a narrow white line on all their dorsal posterior and side edges; abdomen above brownish, dirty raw umber at the base; posterior femora (upper parts only) light reddish-brown, transversely and closely banded with finely waved and regular lines of a darker brown, in three longitudinal and separate rows, the markings all different in each row; middle and anterior femora (upper part only) ochreous; tibiæ and lower parts of femora banded with black and white rings (resembling porcupine quills in miniature); tarsi light straw colour, translucent: posterior pair of legs; femur 1¼ inch long, with one row of seven very small distant spines on the inner edge; tibia 1½ inch long, slightly hairy, with two rows of fine close spines, 35–40 in a row, on two inner edges, sulcated between the rows, at base of tibia two long and villous white spines; tarsus 4-jointed, 8 lines long, smooth, translucent, finely and thickly pubescent, with a single small spine at the base of each joint, joint nearest to the tibia the longest (as long as the other three taken together: middle pair of legs; femur 9 lines long, naked; tibia 10 lines long, with four rows of small spines, five in each row; tarsus 7 lines long, spineless: anterior pair; femur 10½ lines long, with a row of six small spines; tibia 11 lines long, with a row of four small spines; tarsus 8 lines long, spineless, slightly villous and translucent; two long spine-shaped processes, each 4 lines long, at end of abdomen near anus, one on each side, whitish, finely ciliated with long flexuose patent ciliæ, 1–2 lines long; head rather small, narrower than pronotum, and scarcely appearing before it; maxillary palpi long and slender, slightly clavate; eyes rather large, semi-lunar, at base of antennæ and nearly behind them, gibbous edge towards thorax; antennœ thick at base and close together, 8 inches long, articulated, light reddish-brown but darker at articulations, very setaceous, each bearing a row of short obtuse spines on the outer edge in the middle for nearly one-third of its length, spines irregular in size and position, some being near, one on each articulation, some more distant, with 2–3 vacant articulations between, spines always at anterior end of joint, rings of its horns coarser than in the large species (supra) H. gigantea; body without appendages, 1½ inch long.
Hab.—In dark underground caves near the head of the Manawatu river, in the “Forty mile bush,” 1879.
This peculiar and very interesting animal, (of which I regret to say I have but one whole specimen), inhabits in great numbers those small caves which are difficult of access; there they hop and spring about like shrimps, and having such excessively long and fine horns and legs, it is a very difficult matter to secure a perfect specimen; of course the necessity of having a candle burning when in those dark recesses, greatly increases the difficulty. I am indebted to Mr. J. W. Thomson, of Norsewood, for this specimen here described, who captured the insect there, together with some others, which, however, were unfortunately much crushed and broken. The brightness of its colours when fresh, particularly of its black-and-white ringed legs, their excessive tenuity, and the extreme length of its fine setaceous horns, all tend to give this creature an elegant and graceful appearance; in this respect widely differing from the other known species of this genus.