Key to Chinese species of Hesperus babai group

1 Elytra black; abdominal segments III–VI black, segment VIII entirely red.................................. H. babai

– Elytra red, each elytron with a large black spot, occupying about half-length of elytron; abdominal segments III–V reddishbrown, VIII with proximal half yellowish and distal half black...................................... H. pengi sp. n.