Genus Attus, Walck.
Attus auricomus, sp. n. Pl. VIII., fig. 8.
Length of an adult female 7 mm., and of an adult male 7 ½ mm.
Cephalothorax one-third longer than broad, widest at fore part of caput; red-mahogany colour, suffused with dark-brown, sparingly clothed with pale-yellow, golden-orange lanceolate, and strong black erect hairs; median fovea large, shallow, nearly circular; ocular area more than one-third of cephalothorax; profile line rises from thoracic junction at an angle of 45°, runs horizontally as far as posterior lateral eyes, then slopes moderately across caput, which is prominent in front. Clypeus directed inwards, very narrow, furnished with few white hairs.
Space between posterior lateral eyes rather more than interval between them and anterior laterals, latter pair furthest apart, and form with fore-centrals a slightly curved transverse row; anterior row half the diameter of a fore-lateral eye apart.
Legs moderately strong, relative length 1–4, 2, 3; fore-pair reddish hue, suffused with chocolate-brown, hind pairs pale yellow-brown; general joint nearly equals tibial in length, metatarsi rather longer than tarsi; armature short and long fine hairs, 3 spines on upper side of femora, normal number on tibiæ and metatarsi, spines on latter remarkably long; tarsal claws sinuated, long; 1st pair, outer claw 1 strong curved tooth, near centre; inner claw 11 teeth, 10 short, 1 long, curved tooth; 4th pair, outer claw 17 teeth, 16 small close, 1 strong tooth; inner claw 10 teeth, 9 open comb-teeth, 1 strong tooth; hairs of claw-tuft gradually dilated, upright, spreading.
Palpi moderately long, brown, black and white hairs, short curved spine at end of humeral joint.
Falces short, broad, flat, rugose, bright red-mahogany colour.
Maxillæ long, spathulate, red-mahogany hue, apices pale.
Labium rather less than half length of maxillæ, dark-brown, apex round, everted, pale.
Sternum oval, yellowish-brown.
Abdomen elongate-oviform, projects over base of cephalothorax; brown, clothed with bright yellow and erect black hairs; median band, broad-lanceolate, margined with dark-brown, on the basal half there are a series of angular brown marks, apices directed forwards; between latter and spinners, which are long, there is a tapering brown mark; ventral surface light-brown, two dark lines converge posteriorly from bronchial opercula.
Genital eminence moderately prominent, convex above, concave within, orifice oval, projecting from above is a tapering process directed backwards.
Male slightly exceeds female in length, resembles her in form and colouring, specific pattern more defined; median band of cephalothorax formed of yellow and bright orange-red lanceolate hairs, in some examples nearly covering ocular area, tapering towards and bifurcating at thoracic junction; marginal zone fringed with yellow hairs. Anterior eyes, like those of females, are encircled with an iris of golden orange-red hairs. Clypeus thickly bearded with short pale-yellow hairs.
Legs differ from female's in relative, 1, 2, 4, 3, and exceed hers in actual length; first pair red-mahogany colour, suffused with brown, hind pairs pale-brown, darker and faintly annulated towards extremities; outer tarsal claw, 1st pair, 1 strong curved tooth near centre; inner claw 19 teeth, 18 small, close teeth. increasing slightly in length, terminal tooth long, curved.
Palpi moderately long, strong black hairs; humeral joint greenish-brown, projects a short, curved black spine on upper side near its articulation with cubital joint; humeral rather exceeds cubital and radial joints in length, the latter is one-third shorter than cubital; a black curved, horn-like apophysis projects on outer side, at articulation with digital joint, which is a rather narrow oval, has red-mahogany hue of former joints, convex above, convexities directed towards each other; palpal organs simple, inferior surface somewhat pointed bulb, a reddish beaded band extends from base beneath upper fold, curving upwards near apex.
Captured in June beneath old bags, Te Karaka, Auckland, A.T.U.
Attus zanthofrontalis. Plate VIII., fig. 9.
Salticus zanthofrontalis, A.T.Ur. “Trans. N.Z. Inst.,” 1884.
Length of an adult female, 4–5 mm.
Female does not differ much from male, abdomen larger, first pair of legs shorter, relative length 1–4, 2–3; femora, 1st pair, tumid, genua and tibiæ strong, nearly equal in length, metatarsi about two-thirds length of tibiæ, tarsi rather shorter; tarsal
claws moderately strong, curved, inner claw has 7 small close teeth, outer none; hairs of claw-tuft somewhat spathulate.
Palpi resemble legs in colour, armed with hairs and bristles.
Vulva convex, orifice transverse oval, margin of hood, or labrum, produced into a short pointed process, directed backwards; labium prolonged into a reddish pointed process, directed forwards, longer than upper process.
Var. hirta., nov.
This variety is more thickly clothed with hairs, especially in female examples. Cephalothorax brown-black, covered with yellowish and erect black hairs, white patch usually behind posterior lateral eyes. Abdomen clothed with similar hairs; series of white, somewhat angular marks, apices directed forwards, extend along median line; white oblique streaks on lateral margins. Dorsal marks on males, which are less hairy, take the form of spots. Legs, more especially in male examples, furnished with numerous long flexible erect hairs.
Both forms numerous about sunny clay slopes. Te Karaka, Auckland, A.T.U.
Attus saxatilis, sp. n. Pl. VIII., fig. 10.
Length of an adult female, 5–6 mm.
Cephalothorax rather longer than broad, rounded posteriorly, sides abrupt, glossy dark-brown, caput lighter; coarse black hairs about ocular area; median fovea large but shallow; contour of profile rises at an angle of 45°, then slopes across caput, which is moderately prominent in front. Clypeus furnished with long white hairs directed centrally, in height less than diameter of a fore-lateral eye.
Ocular area occupies rather more than one-third of cephalothorax, broader than long; anterior row of eyes sensibly curved, slightly parted, laterals nearly half their diameter from intermediate pair, posterior laterals form a transverse line with fovea, are rather smaller than anterior laterals, interval between them rather less than that between the latter pair; irides encircling fore-row whitish; small laterals equidistant between fore and hind-laterals.
Legs short, slight, relative length 4–3, 1–2; yellowish-brown; armature hairs, spines normal; tarsal claws, 1st pair, sharply curved, about 13 short, close teeth on inner claw, 2 coarse teeth on outer; claw-tuft strong, hairs linear.
Palpi yellowish-brown, long light hairs.
Falces short, vertical, greenish-brown, fangs short.
Maxillæ as broad as long, truncated on inner side; pale straw-colour, slightly suffused with olive-green.
Labium broad-oval, nearly half length of maxillæ, similar tints.
Sternum oval, black, light hairs.
Abdomen ovoid, slightly longer than cephalothorax; brown-black, sparingly furnished with short light hairs. Vulva moderately prominent, convex; margin of hood forms a transverse, lightish brown intumescent lip, extending to branchial opercula.
Shingle slopes, Two-Thumb Range, Lake Tekapo, Canterbury, A.T.U.