Key to Species.
|1. Wings with dark markings||1. flavilatera Tonn.|
|2. Mesonotum in ♂ with distinct dark bands, the median one divided by a pale line; hypopygium small and dark; mesothoracic band not very distinct in ♀||3. furcata Edw.|
|Mesonotum dark on the disc but without distinct bands; hypopygium large and yellow||2. plagiata Tonn.|
1. Mycomyia flavilatera n. sp. Tonn. (Figs. 46, 171, 172.)
♂ Head brown, face yellow, palpi dark; base of antennae up to 4–5 segment yellow, the rest brown. Mesonotum brown with three pale stripes, the middle one with a fine median dark line; scutellum, disc of postnotum, and the hypotergites brownish. Abdomen: first segment yellow, the others with a yellow hind border, the second and third with a narrow yellow base. Hypopygium yellow, very small, and hidden, its structure as in figs. 171, 172. Legs yellow. Wings with dark brown spot on tip of Sc and the little cell, most of distal half with a slight even shadow. Sc1 present, Sc2 past the middle of the little cell, stem of M shorter than M3, fCu before the level of r-m. Halteres yellow.
♀ Similar to male.
Length of body 4½ mm., wing 5 mm.
Type: Khandallah (Tonnoir) 30th Nov., 1921, in Cawthron Institute coll.
Allotype: Kaikoura 22nd Feb., 1922 (Tonnoir).
Paratypes: Aniseed Valley 1st Dec., 1923; Cass 2nd Dec., 1924 (Tonnoir).
Specimens in Brit. Mus., Ohakune, Raetihi Hill (Harris), and Queenstown (Curtis) Sept., 1922, 25th Mar., 1923, Mar.-April, 1923, Oct.,-Nov., 1923.
2. Mycomyia plagiata n. sp. Tonn. (Figs. 168–170.)
♂ Head and palpi brown; antennae with scape and first segment of flagellum yellowish. Mesonotum somewhat shining, brown anteriorly and on disc, sides yellow as well as pleurae; scutellum and postnotum darker. Abdomen brown; hypopygium yellowish, its structure as shown in figs. 168–190. Legs yellowish. Wings unmarked, Sc1 absent, Sc2 just on the middle of the little cell; stem of M as long as M1; fCu at level of tip of Sc. Halteres dark yellow.
♀ Similar to male, venter yellow.
Length of body 3 mm., wing 3½ mm.
Type: Waiho (Tonnoir) 19th Jan., 1922, in Cawthron Inst., coll. Allotype: idem 16th Jan.
Paratopotypes: same dates.
Specimens in Brit. Mus., Ohakune and Raetihi Hill (Harris).
3. Mycomyia furcata n. sp. Edw. (Figs. 49, 168, 169.)
♂ Head as in M. plagiata. Thorax brownish-ochreous dorsally, somewhat shining, mesonotum with three separate dark brown stripes, the middle one almost completely divided by a pale line; in the female these stripes are faint. Postnotum dark apically; pleurae largely
dark brown, almost black. Abdomen dark brown, posterior margins of segments lighter. Hypopygium much smaller than in M. plagiata and very different in structure (see figs. 168–169). Legs ochreous. Posterior coxae somewhat darkened; all coxae simple. Wings as in M. plagiata. Halteres clear yellow, knob not in the least darkened.
Length of body and wing 4 mm.
Type and allotype: Ohakune (Harris) 10th Nov., 1922, in Brit. Mus. coll.