Genus Parakatianna Womersley, 1932.
General facies similar to Katianna. Peg-like sensory organ of Ant. III generally present. Clavate tenent hairs present. Spine-like setae of head and long setae of Ant. III absent.
To this genus, which up to the present has been known only from Australia and Macquarie Island, I now can add a further species from the New Zealand mainland.
Parakatianna hexagona sp. nov. Plate 71, figs. 510–514.
Colour: A basal body colour of yellow with greyish-green hexagonal-shaped pigment patches which coalesce to form two main areas of greyish-green pigment on each side. Dorsally, the pigment passes into transverse bands of a dark reddish-brown colour. There are five such bands on the anterior two-thirds of the body, and the posterior dorsal surface of the abdomen is irregularly marked with chains of reddish-brown hexagons. This hexagonal pattern is evident throughout all pigmentation on the body, including the head. Head greenish-grey with a yellow patch enclosing each dark brown ocellar field and antennal base. Antennae dark purplish-brown. Legs pale greenish-grey, furcula white.
Clothing: Sparsely clothed with short, gently curved simple setae. Posteriorly on Abds. V and VI large stout straight setae occur.
Body: Length 1.0 mm. Antennae about one and a-half times as long as head. Ant. III with sensory peg-like organ. Ant. IV subdivided into eleven distinct sections, of which the longer basal section has two further faint and incomplete annulations. Ant. I: II: III: IV as 7: 9: 19: 50. Ocelli, eight to each side, the anterior inner and three outer ones very large, the posterior inner two smaller, the inner central one smaller still and the central ocellus very small.
Legs: Claw long and curved with inner tooth near centre. No outer teeth. Empodial appendage with outer lamella and broad angular inner lamella supplied with a small spine. Apical bristle of empodial appendage long and wavy, considerably over-reaching tip of claw. Three clavate tenent hairs about equal in length to claw, to each foot.
Furcula: Dens two and a-half times as long as mucro. Mucro spoonlike with outer edge serrated.
Locality: Akatarawa Divide, in rotten log in the forest, 1,400 ft.
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Type: Slide 3/999, Dominion Museum Collection.