![Thumbnail: [Volume 84, 1956-57 page 420]](/journals/rsnz/images/rsnz_84/thumbnails/rsnz_84_02_0469_0420_ac_02.gif)
Nymphs
Last (Fifth) Instar.
Resembles the adult in most essentials of its structure, the differences being mainly those generally characteristic of nymphs in this family the smaller size, the imperfectly developed wings, the much less prominent ocelli, the one-segmented tarsi of the middle and hind legs, the absence of the adult genitalia and terminalia.
Head. Length—head:pronotum. 80:58, anterior lobe of head:posterior lobe 50.30 Width—anterior lobe across eyes:posterior lobe :: 34 33, eye.interocular space: 6:22 (above), 8.5.17 (below) Eyes dark, ovoid in side view, granular, ommatidia numerous and contiguous as in adult and occupying whole of ocular area Ocellar areas not prominent Posterior lobe of head subglobular. Rostrum with third segment shaped as in adult, length of segments I-IV, 11:23.26:17 Length of antennal segments I-IV, 25.45:38 32 Pronotum with the posterior transverse constriction represented only by a sulcus very shortly before base, deepest towards the sides, obsolete in the middle, the lateral margins not incised at its level, so that there are only two distinct pronotal lobes instead of three, as in the adult Posterior lobe with sides nearly straight, anterior and posterior angles broadly rounded. A pair of sublateral foveae and convex tuberosities present as adult. Posterior margin very broadly convex, nearly straight in middle Length—anterior lobe posterior lobe ·· 14 44 Width—anterior lobe:posterior lobe across numeral angles :: 40:66 Impressed median longitudinal ecdysial cleavage line visible on pronotum, scutellum, and obscurely on posterior lobe of head, deepest, widest and foveolate in front of sub-basal sulcus of pronotum Scutellum subtriangular. deflected at base, apex rounded, as long as wide at base. Fore wings about ⅔ as long again as pronotum (100:58), passing base of third abdominal tergum, sometimes reaching base of
![Thumbnail: [Volume 84, 1956-57 page 421]](/journals/rsnz/images/rsnz_84/thumbnails/rsnz_84_02_0470_0421_ac_02.gif)
fourth; coriaceous throughout, usually somewhat convex from side to side, shining, impunctate, whole surface covered with long, pale, suberect hairs, without trace of a transverse sulcus, costal margins straight, anal margins touching or nearly touching subapically in mid-line for about ¼ of their length; separated behind scutellum by a triangular space Apex of hind wings level or nearly level with that of fore Legs with claws and tibial and tarsal spines as in adult All ta [ unclear: ] isi one-segmented Length of femur, tibia, tarsus, front legs, 90.80:24, hind legs, 95:95.40. Colour Head, pronotum, scutellum, and front wing pads shining testaceous, head highly polished, antennae, rostrum and legs yellowish brown, femora white or pale at apex, the front pair most noticeably so, abdomen pale, dull, yellowish brown, the last visible sternum (8th) not strongly sclerotised nor darkened. Length about 5.1–5.3 mm Width (across eyes) 0.44–0.46 mm; (across humeral angles of pronotum) 0.88–0.97 mm.
Specimens Examined. Paiaka, near-Foxton. Manawatu : (Wellington Prov.), 15.8 1949, R. A. Cumber (1); beneath Phormium tcnax,—8 1951, R. A. Cumber (4).
3rd Instar (probably ♀) differs from 5th:
Eyes each with 4 large ommatidia rather closely grouped towards centre of ocular area. No visible ocellar rudiments Length of rostral segments I-IV, 8: 10:15. 11 Length of antennal segments I-IV, 14.25.20.27 Length, head:pronotum :: 55:37, anterior lobe of head. posterior lobe 35:20, anterior lobe of pronotum:posterior lobe. 11:26 Width, head across eyes: posterior lobe, 23:27, anterior lobe of pronotum:posterior lobe :: 30.42. Posterior pronotal lobe with sides evenly convex. widest in middle Wing buds obscurely differentiated; front pair rather shorter than posterior lobe of pronotum (23.26), just passing base of metanotum, hind pair reaching nearly to apex of short first abdominal tergum; anal margins widely separated Length of femur, tibia, tarsus, 55.47.16 (fore legs); 55:55:26 (hind legs). Connexivum very wide. Colour yellowish brown.
Length. 3.0 mm.
Width. (across eyes) 0.31 mm; (across middle of posterior pronotal lobe) 0.56 mm.
Specimens Examined. Norsewood, Wellington Prov.(leaf mould, mixed forest), 27.1 1948, P. Culhford (D M) (1)
3rd Instar (probably ♂) differs from 5th.
Eyes each with a group of 4 large close ommatidia towards centre and about 8–20 small separated ones No ocellar pigment spots. Length of rostral segments I-IV, 5:7:16:11 Length of antennal segments I-IV, 11.21.20.21 Length; head:pronotum :. 43.30, anterior lobe of head:posterior lobe :: 28.15, anterior lobe of pronotum:posterior lobe :: 10:20. Width—head across eyes:posteior lobe: 23:27, anterior lobe of pronotum:posterior lobe :: 25:37 Front wing buds as long as pronotum, reaching to base of abdomen; hind pair reaching about ½ way along 1st or even 2nd abdominal tergum. Length of femur, tibia, tarsus, 35:35.10 (front legs); 36.38.17 (hind legs). Head, rostrum and thorax light yellowish brown, antennae, legs and abdomen pale.
Length. 3.2–3.5 mm.
Width (across eyes) 0.31 mm. (posterior pronotal lobe) 0.47–0.59 mm.
Specimens Examined. Punakiteri, near Kaikohe, N. Auckland, leaf mould,—2 1951, T. E. Woodward (2).