The seasonal variation in percentage parasitization and in the average number of individuals ofEchinomeraspp. inLithobius forficatusandL. variegatusis described and discussed. It is suggested that infection byEchinomera hispidamay account for the low numbers ofL.forficatusin damp woodlands.Coccidia occur only inL. variegatusand the incidence of metazoan parasites is very low.