Go to National Library of New Zealand Te Puna Mātauranga o Aotearoa
Volume 57, 1927
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1. Tip of M1 strong and dark, contrasting with the fainter basal portion (Arctoneura) 2
Tip of M1 scarcely if any darker than the basal portion; small species, wing not much over 5 mm. (Nervijuncta s. str.) 13
2. Anterior pronotal lobes largely dark brown above; face ochreous to dark brown, without distinct silvery dusting, but with rather long and numerous bristly hairs 3
Anterior pronotal lobes entirely pale yellow; face conspicuously silvery when viewed from above, with a few rather short hairs arranged in a transverse row 8
3. R4 normally crossing the clear space and ending well beyond tip of R1; middle pair of mesonotal stripes several times narrowly interrupted but almost reaching the front margin 4
R4 not crossing the clear space, and ending only a short distance beyond tip of R1; mesonotum normally with a broad transverse yellow band in front; flagellum, ringed 5
4. Flagellum all black, wings with two broad blackish bands 1 hudsoni Marshall
Flagellum ringed; wings more mottled 2 wakefieldi Edw.
5. A large dark mark on lower part of sternopleura; wings with a brown patch below An, covered with macrotrichia 4 tridens Hutton
No dark patch on sternopleura; no macrotrichia in anal field except just below tip of Cu2 6
6. Eye-bridges only three facets wide and separated in the middle by about the width of six facets; mesonotum typically with two dark spots near front margin in middle 5 ruficeps Edw.
Eye-bridges at least four facets wide and separated in the middle by at most the width of three facets; mesonotum with a narrow but continuous dark band near front margin 7
7. Mouth parts entirely pale yellowish 6 parvicauda Edw.
Labium and last segment of palpi blackish 7 pilicornis Edw.
8. Wings yellow with suffused markings; mesonotum all yellow on anterior third; pleurae all yellow 8 flavescutellata Tonn.
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Wings less yellow, markings distinct; mesonotum with a narrow blackish band close behind the front margin; pleurotergites with a large dark patch 9
9. Wings cuneiform at base, the anal field narrow; subapical clear band almost devoid of macrotrichia 9 longicauda Edw.
Wings not cuneiform, anal field rather broad; macrotrichia evenly distributed over apical half of wing 10
10. Anepisternites entirely black; no dark patch on sternopleurite 11 harrisi Edw.
Anepisternites with a blackish patch below, and another one at the upper corner or its upper part only darkish 11
11. Flagellum more or less distinctly ringed; scutellum usually with six equally strong bristles; R4 completely traversing the clear space; dark wing-tip including distinct hyaline areas 10 hexachaeta Edw.
Flagellum all black; scutellum usually with only four strong bristles, sometimes an additional weaker pair; R4 only just entering the clear space; wing-tip almost all dark 12
12. Sternopleurite all yellow; anal field largely covered with macrotrichia 12 nigricornis Tonn.
Sternopleurite blackish below; anal field devoid of macrotrichia except in the small dark area below tip of Cu2 13 osten-sackeni Tonn.
13. Front margin of mesonotum broadly yellow; upper half of pleurae yellow, the lower half black, strongly contrasting with the yellow coxae 14 nigrescens Marsh.
Colour of thorax quite otherwise 14
14. Scutum entirely orange; eye-bridges much widened in the middle 18 bicolor Edw.
Scutum yellowish with three dark stripes, the lateral pair curved sharply down in front and continued across the pleurae; eye-bridges less widened in the middle, if at all 15
15. Wings largely dark; costa and hind margin with three yellowish areas, apart from the base 15 pulchella Edw.
Costa and hind margin with only one or two yellowish areas separated from the pale base 16
16. Palpi yellow; R4 crossing the clear space 16 marshalli Edw.
Palpi black; R4 ending at beginning of clear space 17
17. Anal field nearly bare; posterior coxae yellowish 16 punctata Tonn.
Anal field hairy; hind coxae black at least at base 19 nigricoxa Edw.
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