calypter

Calypter yellowish with dense darkish brown microtrichae, margin with brownish setulae.

Medium to large flies; male holoptic; lower calypter narrow, rounded posteriorly, with anteromedian angle distinctly lateral to base of scutellum, not directed towards the scutellum; subcostal sclerite and basal section of stein vein bare (remigium); apical tip ofparaphallus with denticles.

Wing: Base fuscous, basicosta black; costa setulose only basally on ventral surface; costal spine shorter than cross-vein r-m; radial node bare, calypters brown; lower calypter slightly shorter than upper one; halter yellow.

Dorsal surface of upper calypter bare in male, with long hairs in female."

6): Wing and calypteres with a light brown tinge; haltere ochre-yellow.

Margins of upper and lower calypteres yellowish brown with fringe of short setulae of the same color.

6 Lower calypter of the Musca-type, i.e., inner margin at first following margin of scutellum then diverging abruptly outward into more-or-less broadly truncated apical margin ...

occidentalis Feng, 2003, with 2 post intra-alar setae), distance between acr rows narrow, scutum usually with 3 indistinct vittae, vein with angulated katepisternum 2+1; [m.sub.1+2] bend, lower calypter with sparse dark ciliae, halter yellow-brown; legs black; abdomen with light pruinosity, only tergite 5 with many discal setae, epandrium and basal parts of surstyli red-brown, paraphallus short, distiphallus long.

Haltere stem yellow, knob black or blackish; calypteres more-or-less equally wide, hyaline, with margin of dorsal calypter partly blackened.

Upper calypter long black ciliate, longest ciliae as long as alula width.

The upper calypter is reduced and modified to carry a number of long, ventrally-directed spines, prominent posteriorly, and the lower calypter is scale-like with a fringe of setae similar to the shorter setae on the upper calypter.

Wing: Costal vein reaching half distance between [R.sub.4+5] and [M.sub.1+2]; [R.sub.4+5] ending not far from wing apex; vein M ending at wing apex; distal parts of [R.sub.4+5] and [M.sub.1+2] slightly diverging and slightly convex anteriorly, parallel at apex; M between crossvein dm-cu and wing apex very weak, foldlike; dm-cu faint; anal vein fold-like; ratio of dm-cu to distal part of [CuA.sub.1], 1:16; lower calypter yellow with pale setae (mostly broken in unique specimen); halter yellow.

Upper and lower calypters brown with very short hairs of the same colour on margin; abdomen covered with brown pruinosity; the longest mid tibial anterodorsal seta about 0.2x length of tibia ...

Some eggs were situated in unusual body parts, difficult to access, such as the ventral part of the abdomen and between the two calypters (Figs 5-7).