Key to males of Chromagallia Linnavuori, 1954

1. Forewings with yellow markings.................................................................................................................2

- Forewings with red markings or without markings.....................................................................................4

2. Anterior dorsum entirely black or dark brown .............. C. zanolae sp. nov. (Brazil, Paraná State) (in part)

- Anterior dorsum with yellow markings (Figs 4–6, 49)...............................................................................3

3. Aedeagal apex (Fig. 51) directed dorsally, its contour not continuing profile of shaft; processes on abdominal segment X poorly developed (Fig. 50) ............... C. flavofasciata (Stål, 1854) (Brazil, unknown state)

- Adeagal apex directed posteriorly, its contour continuing profile of shaft (Fig. 38); processes on abdominal segment X well developed (Fig. 35) ....................... C. longistilata (Coelho & Dutra, 1992) comb. nov. (Brazil, Rio de Janeiro and Paraná States)

4. Crown black with red markings (Figs 1–3).................................................................................................5

- Crown entirely black (Fig. 53).....................................................................................................................7

5. Subgenital plates with less sclerotized, narrow median area on basal portion (Fig. 15); aedeagal apex slightly spiralized (Fig. 17); membrane IX–X with poorly developed processes (Fig. 14) .......................... ............................................................................................. C. carvalhoi sp. nov. (Brazil, São Paulo State)

- Subgenital plates without less sclerotized area on basal portion or, if present, then broader and shorter than above (Fig. 24); aedeagal apex not as above; membrane IX–X with well developed processes (Figs 7, 8, 23, 28)..........................................................................................................................................................6

6. Membrane IX–X with well developed processes directed posteriorly (Figs 7, 8) ........................................ .......................................................................................... C. lamasi sp. nov. (Brazil, Rio de Janeiro State)

- Membrane IX–X with processes directed inward (Figs 23, 28).................................................................... .................................................................................... C. lanceolata sp. nov. (Brazil, Rio de Janeiro State)

7. Pygofer with posterodorsal margin acute or subacute (Figs 30, 54); subgenital plates greatly narrowed (Figs 31, 55).................................................................................................................................................8

- Pygofer with posterodorsal margin rounded (Fig. 18); subgenital plates not greatly narrowed (Fig. 19) .... ....................................................................................... C. zanolae sp. nov. (Brazil, Paraná State) (in part)

8. Pygofer with acute posterodorsal margin (Fig. 54); styles small with obsolete fork (Fig. 56) ..................... .................................................................................... C. saucia (Stål, 1862) (Brazil, Rio de Janeiro State)

- Pygofer with subacute posterodorsal margin (Fig. 30); styles very long and narrow, without fork (Figs 32, 33) ............................................................... C. paraguayensis sp. nov. (Paraguay, Canindeyú Department)