Key to southern African species of Heterotropus 1. Wing with anal cell closed and stalked, discal cell longer than wide; aedeagus trifid; gonocoxa with a dorsal process; spermathecal bulb (if known) cylindrical................. 2 ­ Wing with anal cell open, discal cell no longer than wide; aedeagus bifid; gonocoxa without a dorsal process; spermathecal bulb globular ....................... apertus Greathead 2. Scutum with yellow markings, at least along lateral margins; gonostylus without a median lobe................................................................................................................... 3 ­ Scutum entirely black; gonostylus with a median lobe................................................. 4 3. Head entirely yellow; gonostylus straight and dorsal process of gonocoxa without thorn­like outgrowths ................................................. diamantis Greathead ♀, sp. nov. ­ Head with black markings; gonostylus curled at apex; dorsal process of gonocoxa with thorn­like outgrowths ................................................................................. munroi Bezzi 4. Antennal flagellum yellow; male tarsal claws reduced .........gilvicornis Yeates & Irwin ­ Antennal flagellum black­brown; male tarsal claws normal......................................... 5 5. Length of labium (excluding labellum) equal to length of fore tibia; abdominal terga mostly black­brown with narrow yellow hind margins................................................ 6 ­ Length of labium (excluding labellum) equal to half length of fore tibia; abdominal terga mostly yellow with narrow black basal bands .......... stuckenbergi Yeates & Irwin 6. Male holoptic; head and antenna yellow­brown; gonostylus without a median lobe.......................................................................................... diamantis Greathead ♂, sp. nov. ­ Male with eyes separated by less than width of median ocellus; head and antenna black; gonostylus with a median lobe ........................................ posthos Yeates & Irwin

Published as part of Greathead, David J., 2006, New records of Namibian Bombyliidae (Diptera), with notes on some genera and descriptions of new species, pp. 1-88 in Zootaxa 1149 (1) on pages 10-11, DOI: 10.11646/zootaxa.1149.1.1, http://zenodo.org/record/5058081