Pseudoscaeva meridionalis (Fluke, 1950):446

The subgenus Pseudoscaeva is distinguisehd by metasternum bare, eye bare, antenna short, vein M1 sinuate, metaepisternum bare, wing almost completely bare and ocellar triangle equilateral at acciput margin.

Synonym:

Stenosyrphus (Episyrphus) diversifasciatus var. meridionalis Fluke, 1950: 446.

New description:

FEMALE.

Head: Face with facial tubercle, yellow with medial shiny dark vitta, dark maculae dorsad to genal suture, pale pilose, densely white pollinose except medially; gena yellow, white pilose; lunule dark brown; frons yellow on anterior 1/3 with ventral black area (lunule), black on dorsal 2/3 with dense white pollen on lateral margins, black pilose; eye bare; vertical triangle black, black pilose; antenna brown, basoflagellomere orangish ventrally; occiput black, white pollinose, white pilose.

Thorax: Scutum black with bluish iridescence, densely white pollinose anteriorly, with two submedial white pollinose vittae broadly separated, white pilose; postpronotum bare; scutellum yellow, dark on anterior and lateral margins, black pilose, subscutellar fringe complete with yellow pile. Pleuron black with bluish iridescence, except posterior anepisternum yellow on posterior 1/3 and anterior and dorsomedial anepimeron yellow, densely white pollinose medially, white pollinose; anterior anepimeron pilose; metasternum bare; calypter white; plumula white; halter brown, capitulum black; spiracular fringes white. Wing: Wing membrane hyaline, stigma darker; broadly bare with microtrichia on apical and posterior margins. Alula broad, broader than costal cell, mostly bare with microtrichia on posterior margin. Legs: Entirely brown, femora-tibiae joints yellowish, tarsi darker.

Abdomen: Parallel-sided. Dorsum black, white pilose; each terga mate black with bluish pollinose fascia on anterior and posterior margins, except tegum 1 entirely covered by this pollen. Tergum 2 and 5 with two lateral yellow maculae, the ones in tergum 5 triangular; terga 3 and 4 with submedial yellow fascia with emarginated posterior margin, not reaching lateral margins (sometimes narrowly divided medially).

Ocyptamus (Pseudoscaeva) meridionalis (Fluke, 1950).

Fluke, C.L.,Jr. (1950) Some new tropical syrphid flies with notes on others. Acta Zoologica Lilloana 9, 439-454.

Species described from Villa Padre Monti, Tucuman Province. Only known from Argentina.