Subfamily Sciapodinae
Key to species (males)
1. Two strong posterior dc, preceded by some weak and hairlike bristles. - 2
- 4 or 5 strong dc. – 6
2. tp slightly sinuate. Hind tibia with a black posterior callus. First segment of fore tarsus unmodified. Cercus of hypopygium bifurcate. All coxae dark. - Chrysosoma snelli Curran, 1927.
- tp straight or nearly straight. Hind tibia of male without posterior callus. First segment of male fore tarsus usually ventrally adorned [bearing short black bristlets, or a cushion of short pale hairs; not adorned in Amblypsilopus simplex (De Meijere, 1910)]. Cercus shaped otherwise. At least fore coxa yellow [but dark in Ethiosciapus prysjonesi Meuffels & Grootaert, 2007]. - 3
3. Coxae and femora dark brown. First and second segments of fore tarsus not broadened or flattened, bearing a dense cushion of short pale hairs. - Ethiosciapus prysjonesi Meuffels & Grootaert, 2007
- At least fore coxa yellow; femora yellow. First and second segment of fore tarsus differently adorned. - 4
4. Antenna yellow. All coxae yellow. First segment of fore tarsus ventrally at base with a cluster of very short bristlets, and one longer black bristle. Segments 1-4 of abdomen largely yellow. - Amblypsilopus pallidicornis (Grimshaw, 1901), incl. sp. S30.
- Antenna dark. Mid and hind coxae dark. First segment of fore tarsus not or differently adorned. Abdomen dark. - 5
5. First segment of fore tarsus feebly bent, slightly broadened and flattened, ventrally with a dense row of very short black bristlets. - Ethiosciapus bilobatus (Lamb, 1922).
- First segment of fore tarsus unadorned. - Amblypsilopus (?) simplex (De Meijere, 1910).
6. Marginal bristles of scutellum long (much more than half as long as the marginal bristles). First segment of fore tarsus strongly broadened and flattened. 5 strong dc. - Aldabromyia plagiochaeta Meuffels & Grootaert, 2007
- Scutellum without or with very short laterals. First segment of fore tarsus not broadened or flattened. 4 or 5 strong dc. - 7
7. Hind femur with an anterior preapical seta. - Bickelia parallela (Macquart, 1842).
- Hind femur without preapical seta. - 8
8. Face very broad (about as wide as the width of an eye). Eyes densely shortly pubescent. Cercus of hypopygium with a distinctive sclerotized basal hook. - Bickeliolus lasiophthalmus (Lamb, 1922).
- Face narrow (at most about 2/3 as wide as width of an eye), mostly very narrow; often the eyes are touching each other. Eyes bare. Cercus without sclerotized basal hook. - 9
9. 5 strong dc. - 10
- 4 strong dc. - 11
10. Eyes touching each other. All coxae yellow. - Mascaromyia leptogaster (Thomson, 1869).
- Face about 2/3 times as wide as width of an eye. Fore coxa yellow, mid and hind coxae dark. - Mascaromyia digrediens Meuffels & Grootaert, 2007
11. Basal segments of antenna black or dark brown, third segment usually slightly paler. Abdomen dorsally entirely dark. - 12
- Antenna entirely yellow. Abdomen dorsally entirely or partly yellow. - 13
12. Eyes touching each other. All coxae yellow. - Mascaromyia magnicaudata (Lamb, 1922).
- Face about 2/3 times as wide as wdth of an eye. Fore coxa yellow, mid and hind coxae dark. - Mascaromyia gerlachi Meuffels & Grootaert, 2007
13. Eyes touching each other. First segment of fore tarsus ventrally on apical 2/5 with a row of about 7 erect thin bristlets. - 14
- Face very narrow, but eyes separated. First segment of fore tarsus ventrally on basal half with a dense row of short black bristlets. - 15
14. Fifth segment of fore tarsus dilated, bearing a small side process like a thumb. - Mascaromyia pollicifera (Lamb, 1922).
- Fifth segment of front tarsus undifferentiated. - Mascaromyia indistincta (Lamb, 1922).
15. Mid femur ventrally on basal half with a row of 5 dark bristles. - Mascaromyia amplicaudata (Lamb, 1922).
- Mid femur without bristles. - Mascaromyia grandicaudata (Lamb, 1922).