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Genus Katianna Börner.
With the addition of the following new species, there now are four species and one sub-species of this genus known from New Zealand, and of these, three species are endemic.
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| 1. Claw with one inner tooth | 3 | |
| Claw with two inner teeth | 2 | |
| 2. Yellowish species with darker mottling. | K. australis Womersley. | |
| Olive-green species with yellow or lighter green spots. | K. australis sub-sp. tillyardi Womersley. | |
| 3. Clavate tenent hairs present on foot, mucro with serrated lamella. | 4 | |
| Clavate tenent hairs absent, mucro with plain lamellae. | K. venusta sp. nov. | |
| 4. Claw without tunica. Two elongate tenent hairs to each foot. | K. antennapartita Salmon. | |
| Claw with tunica, three clavate tenent hairs to each foot. | K. purpuravirida Salmon. |
Katianna venusta sp. nov. Plate 1, figs. 2–3; plate 2, figs. 28–30.
Colour: This attractive bright-reddish coloured species when mounted shows a yellow ground colour with irregular dorsal bands and patches of bright red-brown and reddish-violet mottling on the sides. Head violet in front. Antennae dark red-brown on first three segments, Ant. IV deep-violet. Legs yellow with broad red-brown or violet bands. Furcula brownish mottled. Ocellar fields deep reddish-violet. Ocelli dark brownish-black.
Clothing: With dorsally many very long serrated setae in which the serrations are widely separated. Some of these setae on the body are equal in length to the dens. Setae of the furcula are plain. Plain and serrated setae both occur on the legs and antennae. On Ant. III the long setae are three-quarters the length of the dens, and each seta arises from a prominent raised socket. Several stout, spine-like setae on top of head.
Body: Length up to 1.25 mm. Antennae twice the length of the front of the head, the four segments related as 12:15:28:77. Ant. IV with 14–16 subdivisions and apically with exsertile knob, and 5–6 sensory bristles. Ant. III without peg-like organ. Ocelli eight to each side, the central one very slightly smaller than remainder, which are large and equal.
Legs: Claw with one inner tooth just above centre, no outer teeth. Empodial appendage with broad inner and narrower outer lamellae, the inner with a strong spine at the angle. Terminal bristle arising just before apex and over-reaching tip of claw. Clavate tenent hairs absent.
Furcula: Dens three times as long as mucro. Mucro boat-shaped with three plain lamellae and strong outer basal seta.
Locality: Karori Hills, amongst leaf mould in bush-clad gullies. Not very common. (Author's Coll.).
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Type: Slide 3/1288. Dominion Museum Collection.
Remarks: The absence of the peg-like organ on Ant. III and the peculiar structure of the setae may necessitate the erection of a new genus for this species if further similar species should be discovered in the future.