Hirtodrosophila undetermined, Duda., Duda.

Grimaldi, David A., 2018, Hirtodrosophila Of North America (Diptera: Drosophilidae), Bulletin of the American Museum of Natural History 2018 (421), pp. 1-1 : 1-

KEY TO HIRTODROSOPHILA SPECIES OF AMERICA NORTH OF MEXICO

1. Pleura entirely or mostly light, cream colored, at most with thin, dark brown stripe just below notopleural suture (figs. 5, 9, 13, 14); no dark or faint infuscate areas over most of pleura...........................................................2

– Pleura either largely dark brown, or with discrete dark patches, or having faint/diffuse brownish infuscation over at least portions...................................................5

2. Largely dark brownish-black species with solid, thin longitudinal stripe under notopleural suture (fig. 14)........................................ .................................. thoracis (Williston)

– Largely light to dark yellowish or light brown; with short, diffuse marking under notopleural edge and wing base, or none...............3

3. With short, diffuse marking under notopleural edge and wing base (fig. 13)............................ ................................... prognatha (Sturtevant)

– Without such markings....................................4

4. Scutum light brown, with faint, incomplete pair of paramedian stripes; abdomen uninformly light brown (fig. 5).......... florida , n. sp.

– Scutum dark yellowish, without paramedian stripes (figs. 9C, D); posterior margin of most abdominal tergites with dark transverse band (fig. 9E)........................................... .......... orbospiracula (Patterson and Wheeler)

5. Dark transverse bands on posterior margins of tergites interrupted in middle (figs. 10D, 11D).............................. ordinaria (Coquillett)

– Such bands not interrupted in middle, bands either of uniform thickness or widened in middle.....................................................6

6. Pleura with katepisternum, anepimeron and katatergite brown with discrete edges, rest of pleura light, cream colored (fig. 7B).............. .............................................. jaenikei , n. sp.

– Pleura with infuscation, from either faint and restricted to extensive, dark................7

7. Pleura with faint infuscation (fig. 4B), abdominal coloration sexually dimorphic (male is all dark; female tergites with dark posterior band that is expanded in middle; figs. 4C, D), arista with two ventral branches (fig. 20B).................... duncani (Sturtevant)

– Pleura with extensive infuscation, male tergites very similar to those of female; arista with one ventral branch...................................8

8. Posterior half of tergites 3, 4, 5 with dark brown transverse band of even width (anterior half is yellow) (fig. 3C), carina barely developed (fig. 3B)............................................ .......... chagrinensis (Stalker and Spencer)

– Dark bands on tergites 3, 4, 5 thickened in middle......................................................9

9. Scutum light brownish, slightly shiny (fig. 8C), barely with grayish-brown pollinosity ................... longala (Patterson and Wheeler)

– Scutum dark brownish with distinct pattern of grayish pollinosity (figs. 2B, 12B)...........10

10. Dark tergal bands interrupted near lateral margins (figs. 12D, E), posterior crossvein (dm-cu) with faint infuscation (fig. 16) ....... .................................. pictiventris (Duda)

– Dark tergal bands not interrupted near lateral margins, dm-cu without infuscation..........11

11. Apex of cell Sc cell with small dark lappet (fig. 15A); carina barely developed (fig. 2A) ................................ alabamensis (Sturtevant)

– Apex of Sc cell without small dark lappet; carina well developed.....................12

12. Wing clear; Sc break without black spot; legs yellowish ....... grisea (Patterson and Wheeler)

– Wing dusky; Sc break with black spot; legs grayish brown ............................................. .............. cinerea 1 (Patterson and Wheeler)