Keilbachia, Mohrig, 1987

Kauschke, Ellen, 2017, New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part IV. Genera Eugnoriste Coquillett and Keilbachia Mohrig, Zootaxa 4319 (1), pp. 53-76 : 66

Key to the species of Keilbachia (males)

1 Gonostylus with an apical tooth; the base of the spine on the inner side is long and arm-like (nearly as long as the spine itself).............................................................................. K. semiacuta sp. n. ( Fig. 11 )

- Gonostylus without an apical tooth; the base of the spine on the inner side is much shorter than the spine itself............2

2 The spine on the inner side is located in or above the middle of gonostylus; gonostylus apically with several long bristles and one as long, fine, hyaline spine................................................ K. neglecta (Johannsen) ( Fig. 10 )

- The spine on the inner side is located below the middle of gonostylus; gonostylus apically with two long bristles and a shorter hyaline spine................................................................... K. americana sp. n. ( Fig. 9 )

Figures

FIGURE 9. Keilbachia americana sp. n. Male. Holotype. A. Gonostylus, ventral vieW. B. Antennal flagellomeres 3 – 4. C. ApeX of fore tibia.

FIGURE 10. Keilbachia neglecta (Johannsen, 1912). Male. A. Part of hypopygium, ventral vieW. B. Antennal flagellomeres 3 – 4.

FIGURE 11. Keilbachia semiacuta sp. n. Male. Holotype. A. Part of hypopygium, ventral vieW. B. PediCel and antennal flagellomeres 1 – 5. C. ApeX of fore tibia.