Art. XIV.—A Description of a large and new Species of Orthopterous Insect, of the Genus Hemideina, Walker.
[Read before the Hawke's Bay Philosophical Institute, 9th August, 1886.]
Hemideina longipes, sp. nov.
Male.—Body smooth, legs and palpi hairy; general colour dark red-brown clouded with black. Head, rather small elliptic-globular, slightly wider than prothorax; eyes large, sub-lunate, gibbous, broadest above, horny integument filled with minute quadrangular facets; clypeus ochraceous, transversely rugulose above; labrum large, longitudinally ridged in the centre, minutely pitted and creased, yellowish spotted with dark-brown, with a few small vibrissæ; maxillary palpi very long, about 1 inch, slender, finely pubescent, three last joints nearly equal, last the longest, tip slightly clavate, hollow (? or extreme point wanting), pale coloured; labial palpi rather short, stoutish, second and third joints of equal length, colour pubescence and hollow tips as in maxillary palpi; antennæ, etc. … Thorax shining: prothorax 5 lines wide, slightly
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concave, dark-brown mottled with black, and a black transverse band within each margin, edges thickened, brown; mesothorax and metathorax each 2 ½ lines wide, dark-brown with blackish mottlings; sternum of thorax, coxæ, trochanters, and femora below light-chocolate brown and very glossy, coxæ slightly pubescent. Abdomen short, rather narrow, sub-compressed, about ½ inch long, seven rings slightly arched, smooth above, sides minutely muricated, dark brown transversely banded with black and mottled with black above; anal appendages two, 5 lines long, slender, subulate, obtuse, curved, light-brown, very hairy almost shaggy. Legs: posterior pair very long; femur 2 inches long, straight, smooth, largely clavate, outer side convex, unarmed, inner side very deeply grooved, and armed with a row of spines on each edge, edges sharp, glossy, also the spines; 12 spines, distant, in the inner row, and 21 spines, smaller and closer in the outer row; upper part of thigh 4 lines wide, stout, thick, of a light dull-brown colour, smoothish, shaded with darker wavy lines that are minutely hairy (sub lente), the lower end dilated laterally into two thin auricled processes, with a minute black spine on each; tibia 2 ½ inches long, slightly curved, slender, piceous, studded with numerous minute short hairs, giving it a semi-muricated appearance, the inner side convex, the outer deeply grooved and armed on the edges with two rows of acute spines, 16 in the outer row, the uppermost very small, increasing in size downwards, the lower 6 the largest, 12 spines in the inner row, the lower 7 very large and rather slender; at the lower end of tibia 8 spines around the joint, 2 of them small, close above, 2 on each side, one of them being very large, 1/10th inch long, and 2 smaller below; tarsus 1 inch long, slender, unarmed save 2 small spines at the lower end of each joint, the upper joint longest, 4 ½ lines long, the third very small, and the last 3 lines long, the inner side deeply and narrowly grooved, ending on each joint in a long ovate loop with raised margins and no pulvilli (and so the other two pairs); ungues small, curved, divergent: middle pair, femur and tibia each 1 inch long, slender, each having 3 pairs of lateral, small, sub-opposite distant spines, with minute intermediate denticulaitions or points, and 4 small spines at the lower end of tibia, and two of the same at lower end of femur; tarsus 7 lines long, unarmed, very slender, upper joint longest, 3 lines long; tarsi and tibiæ light-brown, clouded: anterior pair, femur and tibia each 13 lines long, grooved; femur slender, unarmed on outside save minute tubercles or blunt denticulations on the outer edge of groove, and 4 small slender spines on the inner edge with similar minute tubercles, and 1 small spine on the lower auricled end on the inside; tibia, 3 pairs small alternate distant lateral spines, and 4 small spines at the
lower end of joint, the lower half pale-brown, clouded; tarsus 8 lines long, slender, unarmed, pale ochraceous-yellow with darker joints.
Hab. In trees, totara timber (Podocarpus totara, A. Cunn.), forests, Norsewood, County of Waipawa; 1885.
Obs. This is a very remarkable species, from the comparative shortness of its body and great length of its stout posterior pair of legs, which are nearly four times the length of its body and head! being considerably longer than those of the two very large species—H. gigantea, Col.,* and Deinacrida heteracantha, White.dagger Unfortunately, my only specimen is imperfect, wanting the upper part of the head, antennæ, maxillæ, and prosternum; it got crushed in capturing by the workmen at the sawmill, and I only obtained the major part of the insect (that had been preserved for me) a few days after. Luckily, however, the legs and body were perfect, and so was a portion of the head, containing the clypeus, labrum, and maxillary and labial palpi. It must certainly be a rare species, as none of the workmen at the mill, nor of the villagers, (who subsequently saw it), long-used as they have been to forest work, had seen one like it before, although they very well knew the commoner and smaller kinds: it was also quite unique to me.
I may here repeat what I remarked before, in describing another rare and allied species, Deinacrida armiger, Col., that this insect appears to possess characters belonging to those two closely allied genera (Deinacrida and Hemideina), and that I doubt those two genera being naturally distinct.‡