Syneches stigmaticalis Bezzi

Menezes, Isis Sá & Ale-Rocha, Rosaly, 2016, Revision of the Amazonian species of Syneches Walker (Diptera, Hybotidae, Hybotinae), Zootaxa 4103 (5), pp. 401-442 : 428-429

Syneches stigmaticalis Bezzi

( Fig. 122 )

Syneches stigmaticalis Bezzi, 1909: 316 ; Collin, 1933: 28 (citation); Smith 1967: 10 (catalog); Rafael & Ale-Rocha, 1995: 537, figs 36–39 and 63 (review); Yang et al., 2007: 313 (catalog).

Diagnosis. Small (about 3.2 mm length) and dark brown. Antenna yellow; scape very small; palpus yellow. Scutum high, rounded, dark brown to black, with grey pruinescence on lateral, anterior and posterior margins, central area of scutum with brown pruinescence; postpronotal lobe and postalar callus yellow; prosternum narrow. Abdomen dark brown. Legs yellow except distal half of hind femur brown; hind femur slender. Wing ( Rafael & Ale-Rocha 1995, fig. 63) lightly brown, pterostigma quadrangular located at end of R1 and dark brown small stain on apex of cell r1.

Material examined. BOLIVIA. Beni, Rurrenabaque, W.M. Mann, Mulford, Bio. Expl., 22.xi.1921 (31 ♂, 26 ♀, USNM).

Geographical distribution. Bolivia ( Fig. 122 ).

Comments. The specimens observed, in general way, are lighter than the specimen described by Bezzi (1909).

This species is similar to S. striatus sp. nov. by the high and rounded scutum, quadrangular pterostigma located at the end of R1 and small brown stain on apex of cell r1, but can be differentiated from it by the yellow legs with distal 1/2 of femur brown, and features of the male terminalia.

Figures

FIGURE 122. Geographical distribution of S. pyramidatus, S. rafaeli, S. repletus, S. stigmaticalis and S. striatus in Amazon.