Melanagromyza nibletti

Family

Subfamily

Genus

Species

Melanagromyza nibletti Spencer, 1957

Mine

N/A. An internal stem-borer. Pupariation internal.

Host Plants

• Silaum

Confusion Species

N/A.

Recording Grade

5

National Status

pExtinct.

Puparium

Straw-coloured, posterior spiracles separated by slightly less than own diameter, solidly chitinised, black, possessing 10-12 paler bulbs around the strong central horn.

Adult

Head: Frons 1.5-2.0x as wide as eye. Orbits slightly projecting above eye in profile, 2 ors, 2 or 3 ori. Orbitals in 2-3 rows, short, sparse, mostly proclinate but several reclinate setulae may also be present. Eye in male with indistinct pubescence at level of ors. Gena slightly deeper in centre below eye, 0.25x as high as eye. Cheek forming a distinct ring below eye. Orbits wide; lunule semi-circular, with a slight central furrow. Ocellar triangle reaching to level of lower ors. Third antennal segment small, rounded, with short pubescence, not longer than the basal section of the arista.
Mesonotum: 2 strong dc; acr in 8-10 rows, reducing to 4-5 at level of first dc. No setulae detected on or at the side of the scutellum.
Wing: Hyaline, ultimate section of vein M₄ 0.65 (average) that of the penultimate. Costal sections (2-4) with an average ratio of 100:29:24. Length 2.3 mm in male, 2.6 mm in female.
Colour: Frons matt blackish-brown. Orbits weakly shining, ocellar triangle matt. Lunule lighter than frons, grey-black. Gena blackish-brown, palpi black. Mesonotum shining black, weakly coppery, abdomen more greenish. Calypter whitish-grey, margin pale yellow, fringe similar, whitish. Legs all black, with 2 posterolateral setae on mid tibia, the upper sometimes weaker.
Male genitalia: Surstylus possessing a few long setae and several spines on inner surface; basiphallus U-shaped; basal bladder of mesophallus with slight upward curvature; distiphallus without distinct areas of spiculae when viewed from above; distal tubule relatively short and weak.
Female genitalia: Unknown.