Chalarus basalis Loew, 1873

Chalarus basalis Loew, 1873: 215 .

Diagnosis: Male unknown. Female with frontal facets moderately enlarged (J92 Fig. 1 A); frons at narrowest point slightly less to slightly more than twice diameter of largest frontal facet; flagellum yellowish to dark brown; femora and tibiae vary from entirely yellowish to largely mid brown medially, tarsi yellowish; pulvilli of front and mid legs twice the length of hind legs and longer than distitarsus; hairs on femora yellow to light brown; hind femur with apical hairs of pdsr extending as far as apex; hairs on thorax and abdomen yellow to mid brown; lateral sides of tergites 1–2 or 3 paler (yellowish) than tergites 4–6 dorsally (mid to dark brown); ovipositor as in Figs 35, 37 & 39. See Table 1 for coxI and ITS2 barcode sequence accession numbers.

Annotations: The female holotype was obtained for study. The taxon is very similar to C. pughi and reliable identification requires removal of the ovipositor. C. basalis differs in that tergite 9 is slightly shorter (lateral view); hence its slightly lower degree of curvature; base of tergite 9 with area around anal opening slightly broader (dorsal view), frontal facets slightly smaller (impossible to quantify), sternite 8 shorter. The yellow coloration of the anterior tergites cannot be used as a reliable identification character as this also occasionally occurs in C. pughi, as already pointed out by Jervis (1992). Male C. basalis is unknown at present, however, keyed out in Dunk (1997) on the basis of a singleton not captured in copula. The specimen was studied and is thought to belong to either C. fimbriatus or C. pughi . No host records are available.