(Fabricius, 1775)
Length 12-29 mm. Pereon elongate, oval; pleon and urosomite I with weak dorsal and two lateral carinas. ANT I longer than pereon. Outer lobes of MXP elongate, pointed (Scina crassicornis 1). Inner lobes 3 times as short as outer. ART 6 of P V in 3-4 times as short as ART 5, dactyl of P VI long, slightly curved (Scina crassicornis 2). P VI much shorter than V. P VII longer than half of P VI.