Melanagromyza fabae

Family

Subfamily

Genus

Species

Melanagromyza fabae Spencer, 1973

Mine

N/A. An internal stem-borer or root-feeder, often multiple larvae per plant. Pupariation internal.

Host Plants

• Vicia

Confusion Species

Melanagromyza galegae.

Recording Grade

4

National Status

pRDB 1.

Puparium

Pale, yellowish-white, posterior spiracles dark, separated by own diameter, each with an ellipse of 12-15 bulbs around a very short central horn. Length 3.4-3.6mm in male.

Adult

Head: Frons 1.5x as wide as eye, orbits slightly projecting above eye in profile. Orbital setulae numerous, entirely proclinate. 2 (rarely three) strong ors, 3-4 strong, mostly incurved ori. Ocellar triangle reaching to level of lower ors. Eye in male possessing conspicuous white pubescence at level of ors. Gena deeper below centre of eye, 0.25x as high as eye. Orbits relatively broad; lunule broad, semi-circular, sometimes with a slight central furrow. Third antennal segment small, rounded with very short pubescence. Arista slender, almost bare.
Mesonotum: 2 strong dc; acr in 10 rows in front, reducing to 4-5 rows at level of first dc. No setulae detected on or at the side of the scutellum.
Wing: Hyaline, all veins brownish. Ultimate section of vein M₄ 0.66 (average) that of penultimate. Costal sections (2-4) with an average ratio of 100:21:24. Distal section of vein R₄₊₅ possessing two or three small dots, each carry one sensillum. Length 2.6-2.7 mm in male, 3.2 mm in female.
Colour: Frons matt black, mesonotum greyish-black, matt, weakly shining when viewed from behind. Abdomen weakly metallic, greenish. Calypter greyish-white, margin dark brown to black, fringe brown to ochreous. Legs dark, brownish-black with 2 posterolateral setae on mid tibia.
Male genitalia: Surstylus possessing a few long setae and several spines on inner surface; basiphallus U-shaped; basal bladder of mesophallus with strong upward curvature; distiphallus with distinct areas of spiculae when viewed from above; distal tubule relatively strong.
Female genitalia: Unknown.