Eumydas, J. Wilcox & N. Papavero, 1971

J. Wilcox & N. Papavero, 1971, The American Genera of Mydidae (Diptera), with the Description of three new Genera and two new Species, Arquivos de Zoologia 21 (2), pp. 41-119 : 83-85

Eumydas , gen. n.

Head in anterior view one and one-half times as wide as high; face at the antennae three-sevenths width of head; oral margin at two-fifths distance from lower eye margin to the antennae. Proboscis similar to Messiasia , labella subequal to length of oral cavity; palpi? Antenna] segment 1 cylindrical and slightly longer than wide; 2 one-half length of 1 and nearly two times as wide as long; 3 slender and nearly four times as long as 1-2; club subequal in length to 3, at two-thirds its length about one-fourth as wide as long (Fig. 15).

Mesonotum with sparse short recumbent hairs on lateral margins and dorsocentral stripes and these areas apparently densely pollinose. Scutellum bare of hairs but a few erect on arms. Postscutellum shallow rugose on dorsum, deeper laterally, bare of hairs. Pleura with long sparse hairs on eplsternum-L, pteropleura and metasternum.

Abdominal tergite-1a hemispherical, bare of hairs; Lp with sparse long hairs, recumbent on dorsum, erect laterally; 2-7 with very sparse short recumbent hairs; bullae (Fig. 46) about three times as long as wide. Sternites 2-7 with short sparse recumbent hairs; sternum 8 of male about one-third length of 7 and with quite dense long hairs. Female" with a terminal circlet of strong spines. Male genitalia (Figs. 79-81): hypandrium completely coalesced with the basistyli, the resulting structure being elongate, ovoid, with a projection between the apical processes; the latter dorsoventrally compressed, well sclerotized, subrectangular, with the outer side prolonged into a beak (especially distinct in lateral view); aedeagus more or less similar to Apiophora ; ventral lamellae and cerci longer than aedeagus; epandrial halves triangular, long and slender, with moderately long hairs; cerci coalesced only at immediate base; halves of epandrium fused only in a small extension at their base.

Fore and middle legs slender. Hind femora long, slightly swollen, about seven times as long as wide; venter with about 16 tuberculate spines; hairs short, sparse, semi-erect. Hind tibiae with ventral keel, apex with a sharp spur subequal to width of metatarsus and a bristle at base. Hind metatarsus about three times as long as wide and sub­ ' equal in length to 2 - 3.

Alulae with a fringe of squamose hairs. Wings about three and one-third times as long as wide; second submarginal cell broadly open· posterior cross~ein present; ambient vein complete; axillary lobe slightly longer than wide.

Length: 21-28 mm.

Geographic range: Brazil.

Type-species, Eumydas corupas , sp. n.