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Volume 70, 1940-41
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Genus Sminthurinus Börner, 1901.

Abds. V and VI distinctly separated from remainder of body. Ant. IV unmodifed, simple. Ant. III generally with a wart-like structure. Ocelli, eight to each side. Claw with or without a tunica. Clavate tenent hairs present. Mucronal edges generally dissimilar.

Five species and one subspecies of this genus are at present known from New Zealand, of which two species and the subspecies are endemic.

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Key to the New Zealand Species of Sminthurinus.
1. Wart on Ant. III absent. Black species with golden-brown appendages. S. nigrafuscus sp. nov.
Wart on Ant. III present. 2
2. Wart on Ant. III dome-like, simple, without sub-divisions. Antennae one and a-half times as long as head. Claw with or without inner tooth.
(a) Entirely yellow species. S. aureus Lubbock
(b) Dorsal surface pigmented with violet to purple. S. aureus subsp. purpureus nov.
3. Wart on Ant. III subdivided into three sections. 4
4. Outer edge of the claw without a tunica or sheath having serrated edges. S. terrestris Womersley
Outer edge of the claw without any tunica. 5
5. Abdomen with laterally a large white ocellus-like marking. S. oculatus Schött
Abdomen with a large yellow hexagon surrounded by a wide circle of yellow markings. S. duplicatus sp. nov.

Sminthurinus nigrafuscus sp. nov. Plate 70, figs. 488–490.

Colour: In life and mounted, entirely black on body. Ant. I brownish-black but remainder of antennae golden-brown. Legs and furcula golden-brown.

Clothing: Very sparsely clothed with very short plain setae.

Body: Length up to 1.1 mm. Antennae slightly longer than head. Ant. I: II: III: IV as 9: 13: 16: 31. Ant. IV apically with two small sensory knobs and 4–5 sense rods. Ant. III without wart-like organ. Ocelli, eight to each side, the central and adjacent inner ocellus very small.

Legs: Claw with one prominent inner tooth at about two-thirds. No outer tooth. Empodial appendage broad with inner angle and small blunt inner tooth at the angle. Terminal bristle curved and fairly short except on front feet where it is long and curved towards inner margin of claw. Empodial appendage of the front foot also is more slender and without inner tooth.

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Furcula: Manubrium: Mucrodens: mucro as 43: 57: 23. Mucro tapering with terminal blunt strongly-upturned tooth and smooth lamellae.

Locality: Karori, Wellington, on newly-dug ground.

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Type: Slide 3/960, Dominion Museum Collection.

Sminthurinus aureus Lubbock, 1862. Plate 70, figs. 491–494.

Colour: Yellow.

Clothing: Of moderately long simple setae.

Body: Length up to 1.0 mm. Ant. III with wart-like organ in basal third, simple without any subdivisions, and large. Ocelli, eight to each side, the central and the adjacent inner ocellus very much smaller than the rest.

Legs: Claw with a single inner tooth at about one-third. Empodial appendage broadly lamellate with long sub-apical bristle reaching to tip of claw. From three to five clavate tenent hairs shorter than claw to each foot.

Furcula: Dens three times length of mucro. Mucro tapering, with outer edge generally serrated.

Locality: In debris under manuka scrub at Paiahia, North Auckland.

Sminthurinus aureus subspecies purpureus nov.

In this subspecies the whole dorsal surface of the body, the vertex of the head, and a portion of the front of the head are pigmented with purple, showing through which are spots and streaks of yellow. The sides and anterior portion of the head, the whole of the undersurface of the body, the legs and furcula are yellow. Antennae purple becoming very dark towards apex.

Locality: Kelburn, Wellington, in a lawn. (Collected by Mr. D. K. Ross.)

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Type: Slide 3/991, Dominion Museum Collection.

Sminthurinus terrestris Womersley, 1932. Plate 70, fig. 495.

This species, which originally was described from South Africa and later from Australia, was recorded from New Zealand in 1936 by Womersley at Christchurch. It has not been found elsewhere.

Colour: Deep violet-black with appendages a little lighter.

Body: Length up to 1.5 mm. Antennae about one and a-half times as long as head. Ant. I: II: III: IV as 3: 6: 8: 15. Ant. IV with apical knob, Ant. III with small wart-like organ which is three-segmented and in contact all round with cuticular granules.

Legs: Claw with an outer sheath, which is serrated on the edge, and a single inner tooth at about two-thirds. Empodial appendage with broad angular inner lamella and an apical bristle reaching to beyond the level of the claw tip. Three clavate tenent hairs half the length of the claw, to each foot.

Furcula: Dens: mucro as 11: 4. Mucro with inner edge finely serrated.

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Sminthurinus duplicatus sp. nov. Plate 70, figs. 496–499.

Colour: In life, dark, with light coloured appendages. Mounted, it has two distinct facies according to whether it is viewed by transmitted light or reflected light. In the former it is a deep black except for the lower half of the furcal segment, which is yellow; the head and antennae, which are brown with a black area between the ocellar fields; Abd. VI and the legs, which are orange-brown; and the furcula, which is pale orange. In reflected light the head, legs, furcula, the lower portion of the furcal segment, and Abd. VI are a bright golden orange. The ocellar fields are black and each is surrounded by a whitish-yellow area down the front of the head, with four regularly-spaced cogs on its inner edge. Remainder of body a dark greenish-grey to brownish-black, with occasional yellow spots. Posterio-laterally on abdomen is a large yellow hexagon surrounded by a wide circle of yellow marks.

Clothing: Very sparse and of short simple setae.

Body: Length 0.85 mm. Antennae about half as long again as head. Wart-like organ on Ant. III three-lobed, Ant. IV not subdivided. Ocelli, eight to each side, the central and adjacent inner ocellus small.

Legs: Claw with one inner tooth at just beyond centre. No outer teeth or tunica. Three clavate tenent hairs about half as long as the claw to each foot. Empodial appendage, with very broad angular inner lamella supplied with a spine at the angle, and a broad outer lamella. Apical bristle long and curved, reaching as far as tip of claw.

Furcula: Dens: mucro as 50: 23. Mucro long and tapering with small apical hook and outer edge finely serrated. Dens with a long apical ventral seta.

Locality: Kelburn, Wellington, in a lawn. (Collected by Mr. D. K. Ross:)

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Type: Slide 3/1000, Dominion Museum Collection.

Sminthurinus oculatus Schött, 1917.

This species, described originally from Queensland, Australia, was reported from New Zealand by Womersley in 1939 (Handbook Primitive Insects of South Australia). No precise locality is given by Womersley in his record, which simply states “a solitary specimen from New Zealand.”

The species structurally is similar to S. aureus, except that the wart on Ant. III is distinctly three-lobed. In colour it is yellowish to dark, the head with violet longitudinal and transverse streaks. The abdomen on each side with a large white ocellus having dark coloured edges.