Haematoloechus singaporensis sp. n. is described from the lungs of Rana cancrivora in Singapore, and Diplodiscus sacculosus sp. n. from the rectum (?) of R. erythraea in Kuala Lumpur, Selangor, Malaya. Glypthelmins staffordi is redescribed from R. cancrivora, R. erythraea, and R. macrodon in Singapore which are new host and locality records for that trematode.