Microdon tsara Keiser

Reemer, Menno & Bot, Sander, 2015, Six new species of Microdon Meigen from Madagascar (Diptera: Syrphidae), Zootaxa 4034 (1), pp. 127-147 : 141-143

Microdon tsara Keiser

( Figs 44–48 )

Microdon tsara Keiser, 1971: 247 .

Diagnosis. One of the two known Madagascan Microdon species with bronze coloured abdomen. Distinguishable from M. irwini by its entirely orange tibiae and partly bare alula.

Type material studied. HOLOTYPE. Female. Label 1 (red): " TYPUS "; label 2: " Madagascar Sambirano, Lokobe, Nossi-Bé, 6 m, 9-23.XI.57. B. Stuckenberg"; label 3: " Microdon tsara Keiser "; label 4: "Muséum Paris, Microdon tsara Keiser 1971 ". Coll. MNHN.

Redescription of female holotype. Body size: 6 mm. Head. Face occupying about 1/4 of head width in frontal view; dark brown; entirely white pilose. Gena black; white pilose. Lateral oral margins produced. Frons and vertex black; yellow to brown pilose. Occiput narrow over entire length; black; yellow pilose; whitish pollinose. Eye bare. Antennal fossa about as wide as high. Antenna brown, basoflagellomere darker than scape and pedicel; basoflagellomere elongate, parallel-sided with rounded apex, with sensory pit slightly apical of 1/2. Arista brown, almost as long as basoflagellomere. Thorax. Mesoscutum, postpronotum, postalar callus and scutellum bronzecoloured; yellow pilose. Scutellum with two apical calcars of about 1/3 the length of the scutellum. Anterior and posterior part of anepisternum not differentiated by sulcus; yellow pilose anteriorly and posteriorly, with bare area in between. Anepimeron entirely yellow pilose. Katepisternum yellow pilose dorsally, bare ventrally. Katatergum and anatergum long and short microtrichose, respectively. Other parts of pleuron bare. Calypter and halter yellow. Wing. Hyaline; microtrichose, except bare on first costal cell, basally on cell r1 along vein RS, on most of cell r, on posterobasal 2/3 of cell bm, basal 1/3 of cell cup, basomedian 1/2 of alula. Legs. Yellow, except femora brownish; yellow to brown pilose. Coxae and trochanters brown; pale pilose. Abdomen. Sternites brownish with bronze hues. Sternite 1 bare, other sternites yellow pilose. Genitalia as in Fig. 48 .

Male. Unknown.

Figures

FIGURES 44 – 48. Microdon tsara Keiser. Male holotype. 44. Habitus dorsal. 45. Habitus lateral. 46. Head frontal. 47. Head lateral. 48. Genitalia lateral.