Ceratophya

Reemer, Menno, 2013, Taxonomic exploration of Neotropical Microdontinae (Diptera: Syrphidae) mimicking stingless bees, Zootaxa 3697 (1), pp. 1-88 : 8

Key to species of Ceratophya

1. First tarsomeres of all tarsi with strong ventrobasal tooth (fig. 54). Tergites 2 and 3 black....................... scolopus

– First tarsomeres without ventrobasal tooth. Tergites 2 and 3 at least partly yellow................................... 2

2. Scutellum (dorsal view) semicircular, without apicomedian sulcus............................................... 3

– Scutellum (dorsal view) with (sometimes weak) apicomedian sulcus.............................................. 4

3. Tergite 2 posteromedially black, laterally with wide, oblique yellow vitta (fig. 30)......................... carinifacies

– Tergite 2 posteromedially yellow, laterally black (fig. 24)............................................ argentinensis

4. Scutellum with weak apicomedian sulcus (fig. 41). Male: tergite 3 blackish brown with posterior margin broadly yellow. Female: tergites predominantly brownish black; tergite 2 with two oblique yellow vittae, tergites 3 and 4 with yellow posterior margins......................................................................................... notata

– Scutellum with deep apicomedian sulcus (fig. 46). Male: tergite 3 blackish brown with posterior margin broadly yellow and with yellow lateral vittae (based on description of Curran 1930; in holotype the abdomen is missing). Female: tergites yellow, only brownish along lateral margins.............................................................. panamensis