1	Elytra with well-defined and impressed striae (Fig. 6A, B)	E. ogmos
–	Elytral without impressed striae (Figs 5A, E, 6E)	2
2	Body strongly convex, 1.8–2.2 mm in length; anterior surface of pro- and mesofemora covered by hydrofuge pubescence along basal half (Fig. 6G)	E. minor
–	Body moderately convex, 2.4–2.9 mm in length; anterior surface of pro- and mesofemora covered by hydrofuge pubescence along basal two thirds (Fig. 5C, G)	3
3	Posterior elevation of mesoventrite bearing a pointed spine (Fig. 7G)	E. spiculatus
–	Posterior elevation of mesoventrite with a sharp, low, transverse, curved ridge (Figs 5C, 7A)	4
4	Parameres of aedeagus 1.2–1.3 × longer than basal piece; median lobe 2 × longer than its greatest width; outer margins of apex of median lobe straight to slightly sinuate (apex of median lobe triangular) (Fig. 7E)	E. teli
–	Parameres of aedeagus 1.5–1.6 × longer than basal piece; median lobe nearly 2.5 × longer than its greatest width; outer margins of apex of median lobe clearly sinuate (apex of median lobe “pinched”) (Fig. 7D)	E. hamadae