Key to Bubalopa species

1. Yellow, dark brown or combination thereof; dorsal outline of posterior pronotal process weakly to moderately arched past humeral angles (Figs. 4B, 4G, 5C, 5G, 9G); forewings not strongly reticulate (<15 supernumerary veins restricted to apical 1/4)................................................................................................. ................................................................................................... 2

- Golden brown with ferruginous tinge; dorsal outline of posterior pronotal process strongly sinuous past humeral angles (Fig. 9C); forewings strongly reticulate (>20 supernumerary veins distributed along apical 1/3).............. B. iguaque sp. nov.

2. Yellow with orange tinge and black punctations; suprahumeral horns slender, longer than wide basally, variable in length and orientation (Fig. 5); dorsal outline of posterior pronotal process feebly arched or gradually descending (Figs. 4B, 4G, 5C, 5G), lateral margins with weakly marked semi-circular impressions (Figs. 4F, 5B, 5F).................. B. furcata (Fairmaire)

- Dark brown with reddish tinge and irregular yellow patches; suprahumeral horns robust and triangular, approximately as long as wide basally; dorsal outline of posterior pronotal process moderately arched, abruptly narrowed at posterior ½ (Fig. 9G); lateral margins with strong semi-circular depressions (Fig. 9F–G).............................. B. obscuricornis Stål