Key to species of Sycophaga brevis species-group

1 Female.............................................................................................. 2

- Male................................................................................................ 3

2 Pronotum about 2× as wide as long medially, and longer than 2/3 length of mesoscutum medially (Fig. 4); ovipositor about 1.25× as long as body (Fig. 1); propodeum micropunctate-reticulate except for two symmetrical smooth and shiny oval areas (Figs 1, 4)................................................................................ S. brevis n. sp.

- Pronotum almost 3× as wide as long medially, and longer than 1/2 length of mesoscutum medially (Fig. 16); ovipositor about 2.4× as long as body (Fig. 13); propodeum smooth and shiny within anterior half and posterior half alutaceous (Figs 13, 16).......................................................................................... S. diutius n. sp.

3 Spiracular process about 5.6× as long as basal width (Fig. 12); pronotum longitudinally striate-strigose (Fig. 10).................................................................................................... S. brevis n. sp.

- Spiracular process about 4× as long as basal width (Fig. 24); pronotum inconspicuously striate-strigose (Fig. 22)................................................................................................... S. diutius n. sp.