Key to Species.
|1. Crossvein r-m as long as the last segment of R1 and less than half the stem of M. Colouration of body and wing rather variable||1. guttata Hutton|
|r-m distinctly longer than the last segment of R1 and longer than half the stem of M||2.|
|2. Wings without markings; colouration mostly orange||2. immaculata Edw.|
|Wings with distinct markings, or if not distinct then the general colouration nearly entirely black||3.|
|3. Body completely black including the halteres and the greater part of the legs||3. obscura Tonn.|
|Body completely black but halteres yellow; legs mostly yellowish||4. subobscura Tonn.|
|4. Wing-tip conspicuously darkened, this dark area delineated from the rest of the membrane by a straight transverse line||7. thompsoni Tonn.|
|Wing marking different||5.|
|5. Base of abdomen with some orange markings||5. basalis Tonn.|
|Abdomen dark at base||6.|
|6. Wings with a spot or shadow in base of cell R5||7.|
|No spots of shadow in cell R5||8.|
|7. Wing markings rather faint; hypopygium orange at base||8. flavicauda Edw.|
|Wing markings strong; hypopygium black||6. affinis Tonn.|
|8. Costa reaching about two-thirds of the way between R5 to M1||9. viatoris Edw.|
|Costa not reaching half-way between R5 and M1||10. minor Marsh.|
1. Anomalomyia guttata Hutton. (Figs. 66, 67.)
This abundant species seems to vary greatly in colour, both of body and wings. In the lighter specimens the mesonotal stripes are narrow and hardly darker than ground-colour; pleurae mainly ochreous, except lower part of sternopleurae; abdominal segments with broad basal ochreous bands; wings with quite small dark spots at base and in middle of cell R5 and cell Cu1. In the darkest specimens mesonotal stripes are blackish and fused; pleurae and abdomen all dark; tibial spurs even sometimes dark and a larger and darker spot in base of cell R5. There is no difference in hypopygium of the lighter and darker forms. In all its varieties it may be distinguished from the other species by its venation: r-m as long as last section of R1 but less than half as long as stem of median fork.
It is found nearly the whole year round all over the country from Stewart Island to Auckland district.
Type in Canterbury Museum coll. without locality.
2. Anomalomyia immaculata n. sp. Edw.
♀ Head orange, except for a small black spot round each ocellus. Palpi orange. Antennae short, flagellar segments not longer than
broad, orange, last 5–6 segments darkened. Thorax uniformly orange, mesonotum shining. Abdomen more brownish-ochreous (probably discoloured), entirely unmarked. Legs bright ochreous, only tibial spines black; middle tibiae with two equal ventral spines. Wings with yellowish tinge, veins hardly darker; no trace of markings. Costa reaching half way from R5 to M1; r-m not much shorter than stem of median fork; R1 half as long as r-m; Cu1 not interrupted at base; An. faint. Halteres orange.
Length of body, 4 mm.; wing, 3.7 mm.
Type: Otira (J. W. Campbell), 10th Jan., 1920, in Brit Mus. coll.
3. Anomalomyia obscura n. sp. Tonn. (Fig. 235b.)
♂ Completely black more or less shining, only basal ⅔ of tibiae, tibial spurs and metatarsi obscure orange. Pubescence of whole body and appendages yellow. Wings with moderately distinct markings: spot at base of cell R5, another darker one along distal half of R5 and gradually merging in apical brown shadow; basal half of cell M1 clear. Venation as in minor. Structure of hypopygium quite different as shown in fig. 235b. Only one ventral bristle on middle tibiae.
Length of body 2½ mm.; wings, 3 mm.
Type: Otira (Tonn.) 9th Feb., 1922, in Cawthron Inst. coll.
4. Anomalomyia subobscura n. sp. Tonn.
♀ Body completely black as well as head and its appendages. Legs mostly yellow; coxae and all ventral face of femora blackish, tibial spurs yellow, tarsi darker towards tip; two subequal ventral bristles on middle tibiae. Wings with very faint markings arranged as in obscura. Wing-shape somewhat more elongated than in other species; tip of Sc at level of fork of Cu which is placed distinctly before base of M; r-m at least equal to ¾ of stem of M, branches of which are rather faint at tip.
Length of body 2½ mm.; wing, 3 mm.
Type: Tahunanui, Nelson, on sea-beach (Tonn.), in Cawthron Inst. coll.
5. Anomalomyia basalis n. sp. Tonn. (Fig. 233.)
♂ Head brown, palpi yellowish, antennae brown, scape somewhat lighter. Mesonotum orange with two lateral black stripes and a trace of a median one, scutellum orange, rest of thorax brownish-black. Abdomen black, base and hind border of second segment orange; hypopygium black, its structure as in fig. 233. Legs: coxae yellow, femora 1 and 2 black underneath at base, hind femora black at base and apex, tarsi mostly yellow; two bristles on ventral face of middle tibiae. Wings with moderately conspicuous markings, a rather faint shadow near base of cell R5, the whole apex of wing darkened and more intensively under distal part of R5, no clear space in middle of cell M1; r-m nearly equal to stem of M. Halteres yellow.
Length of body, 3 mm.; wings, 3 mm.
Type: Otira (Tonn.), 9th Feb., 1922, in Cawthron Inst. coll.
6. Anomalomyia affinis n. sp. Tonn. (Figs. 70, 235c.)
♂ Head and appendages brown, first antennal segment slightly lighter. Mesonotum dark orange with three more or less fused dark stripes on disc; the rest of thorax brown. Abdomen shining black; hypopygium also black, its structure as in fig. 235c, differing but slightly from the one of flavicauda. Legs mostly yellow; tip of coxae 2 and 3 black, also tip of hind femora; the two ventral bristles of middle tibiae subequal. Wings with a conspicuous dark spot at base of cell R5, another one below distal part of R5 which extends into the dark shadow of wing-tip, middle of the cell M1 free. Halteres yellow.
♀ Similar to male, mesonotum lighter, first half of antennae more or less orange.
Length of body, 2½ mm.; wing, 3 mm.
Type: Otira (Tonn.), 8th Feb., 1922, in Cawthron Inst. coll.
Sometimes the thorax is dark with exception of the shoulder and the scape is more or less orange.
7. Anomalomyia thompsoni n. sp. Tonn.
♀ Head orange, ocelli black, middle one distinct although small; palpi orange; base of antennae orange their tip darkened. Thorax rather bright orange. Abdomen shining brown, first segment and terminal lamellae orange. Legs orange with strong black bristles and orange tibial spurs; tip or tarsi darkened. Wing rather elongate, with a distinct yellow tinge, chiefly on anterior border and with apical fourth blackish, the limit between the two differently coloured areas along a straight transverse line; r-m not quite twice as long as last segment of R1: fM below base of Rs. Halteres orange.
Length of body, 3 mm.; wing, 4 mm.
Type: Lake Brunner, 21st Dec., 1925 (Tonn.), in Canterbury Mus. coll.
8. Anomalomyia flavicauda n. sp. Edw. (Fig. 235.)
♂ Very similar to A. minor, differing as follows:—Middle tibiae with the two ventral spines subequal in length. Hypopygium yellow except towards tip; claspers differently shaped, with short blunt spines all over inner face, none of them, however, forming combs as they do in A. minor; aedoeagus also quite different in structure. Costa reaching more than half way from R5 to M1; fCu more distinctly before base of r-m; Cu1 narrowly interrupted at base. A small but distinct spot filling base of cell R5; a larger dark cloud crossing this cell beyond middle, but leaving tip of wing clear; cell M1 slightly darkened at base and beyond middle; Cu1 distinctly dark-bordered above as well as below; An. stronger and darker.
Type: Ohakune (T. R. Harris), Apl., 1923, in Brit. Mus. coll.
9. Anomaloyia viatoris n. sp. Edw. (Figs. 68, 234.)
♂ Head black, with yellow bristles. Palpi and antennae entirely black; first flagellar segment about three times as long as broad, the remainder fully as long as broad. Thorax entirely blackish, slightly shining, bristles all yellow. Abdomen, black, except for the ochreous hypopygium.
Claspers somewhat triangular, with a number of small spines and four or five very stout ones facing inwards; ventral hooks smaller than in the other species. Legs dull ochreous, tarsi darkened; front femora with blackish stripe beneath running the whole length; middle femora with a similar stripe on basal half; hind femora rather narrowly black at tip. Tibial spurs ochreous, spines black; second ventral spine on mid tibiae short. Wings with a slight yellowish tinge, tip darkened, though not conspicuously; a rather more distinct dark stripe below Cu2. Costa reaching about two-thirds of way from R5 to M1; r-m about two-thirds as long as stem of median fork; R1 quite two-thirds as long as r-m; Cu1 narrowly interrupted at base; An. faint. Halteres ochreous.
Length of body, 3½ mm.; wing, 4 mm.
Type: McKinnon Pass (C. L. Edwards); and one other ♂ caught on the snow, 3rd Apl., 1923, in Brit. Mus. coll.
10. Anomalomyia minor Marsh. (Figs. 69, 232.)
Marshall, Trans N.Z. Inst., 28, 1896, p. 295 (Anomala).
Characteristic of this species is the short costa, which extends less than half way from R5 to M1; r-m is two-thirds as long as median fork; last segment of R1 barely half as long as r-m. There is no distinct spot in base of cell R5. The second ventral bristle on middle tibiae is short or absent.
Governors Bay (Tapley), Nelson, 14th Oct., 1923; Hilltop, 16th Feb., 1925; Christchurch, 24th Nov., 1924; Akaroa, 11th Dec., 1924 (Tonn.).