Subgenus Engiscaptomyza Kaneshiro, 1969 17. Mesonotum vittate.....................................................................................................................................18 - Mesonotum lacking vittae..........................................................................................................................21 18. Surstylus sharply concave, with distinct lobe at apex which forms a “C” shape; dorsal lobe of hypandrium narrowly pointed, with indistinct protrusion (see Fig. 1 in Kaneshiro, 1969). Kaua‘i ................................. ....................................................................................................... S. (Engiscaptomyza) ampliloba (Hardy) - Surstylus less concave, straighter in profile...............................................................................................19 19. Protrusion on dorsal lobe of hypandrium somewhat short, indistinct. O‘ahu ............................................... ...................................................................................................... S. (Engiscaptomyza) inflata (Kaneshiro) - Protrusion on dorsal lobe of hypandrium elongate, finger-like.................................................................20 20. Front femur swollen, rufous in color; scutellum with additional setulae inserted on margin between anterior and posterior scutellar setae; ovipositor blunt, with ca. 5 elongate setulae along margin. Maui, Moloka‘i ............................................................................. S. (Engiscaptomyza) crassifemur (Grimshaw) - Front femur swollen (not as distinctly as above), entirely black in color; scutellum only bears anterior and posterior scutellar setae; ovipositor blunt, with only a single elongate setula present at apex. Maui, Moloka‘i ..................................................................................... S. (Engiscaptomyza) nasalis (Grimshaw) 21. Legs entirely yellow, except for brown apex of tarsus; leg segments short and thick. Hawai‘i .................. .......................................................................................................... S. (Engiscaptomyza) reducta (Hardy) - Femora almost entirely brown, tinged faintly with black, narrowly yellow at bases and apices; tibia yellow with a broad brown band at apex and basal 1/3 of segment; tarsi yellow, tinged faintly with brown on apical segments. Maui .................................................................... S. (Engiscaptomyza) lonchoptera (Hardy)

Published as part of Magnacca, Karl N. & O'Grady, Patrick M., 2008, New combinations in Hawaiian Drosophila and Scaptomyza (Diptera: Drosophilidae), pp. 53-60 in Zootaxa 1926 on page 57, DOI: 10.5281/zenodo.184810