Epipharyngeal structures of Lithobius. ALithobius (Lithobius) macilentus; transverse bulge with a smooth surface; two rows of epidermal glandular shafts at the lateral border of the transverse bulge BLithobius (Lithobius) lucifugus; distal transverse bulge with longitudinal striae CLithobius (Lithobius) lucifugus; proximal transverse bulge with longitudinal striae and pores (arrow) DLithobius (Lithobius) fagei; longitudinal striae on the lateral part of the transverse bulge (arrow); continuous branching bristle band from the distal bar to the lateral flap at the margin of the transverse bulge ELithobius (Lithobius) cyrtopus; distinct break of branching bristle band from the distal bar to the lateral flap FLithobius (Monotarsobius) crassipes; distinct break of branching bristle band from the distal bar to the lateral flap. bu – transverse bulge, gl – ‘bottle-shaped’ epidermal glandular shafts.