2 NEW SPECIES OF THE GENUS AMPHIMERMIS KABURAKI AND IMAMURA, 1932 (NEMATODA, MERMITHIDAE) FROM ARGENTINE GRASSHOPPERS (ORTHOPTERA, ACRIDIDAE)

Two new mermithids, Amphimermis ronderosi n. sp. and A. dichroplusi n. sp., are described and illustrated; both are parasites of grasshopper s in Buenos Aires Province, Argentina. Diagnostic characters of the fi rst species include : vagina long and S-shaped; spicules loosely twist ed for proximal 41 % of their length, untwisted for 14 %, again twiste d for 31 %, and untwisted for the last 14 %; three rows of genital pap illae; the ventral row with 30 preanal and fifteen postanal papillae. The second species is characterized by having : S-shaped vagina; the s picules untwisted for 6 % of their length, then twisted for 24 %, untw isted for 12 %, twisted again for 34 %, and untwisted for the last 14 % of their length; three rows of genital papillae; the ventral row wit h 25 preanal and twelve postanal papillae.