J. W. Zetterstedt described between I8I9-I850 thirty-seven species of the Empidid subfamily Tachydromiinae in combination with Tachydromia Meig. (30), Tachypeza Meig. (5), Drapetis Meig. (I) and Empis L. (I). A revision of these species has been based on a study of Zetterstedt's Collection at Lund, Sweden. Lectotypes or holotypes for thirty-six of Zetterstedt's species are designated and a further two lectotypes for Platypalpus pallipes (Fall., I8I5) and Platypalpus boreoalpinus Frey, I943 have been selected. Five species are redescribed, viz., Platypalpus brevicornis (Zett., I842)—the male sex is described for the first time—, Crossopalpus curvinervis (Zett., I842), comb.nov., Platypalpus sordidus (Zett., I838), Platypalpus unguiculaws (Zett., I838) and Platypalpus boreoalpinus Frey, I943. The following species are described as new: Platypal pus confiformis sp.n., Platypalpus zetterstedti sp.n., and Platypalpus alpinus sp.n. Some new synonymy is established: Symballophthalmus scapularis Collin, I96I is a synonym of Symballophthalmus fuscitarsis (Zett., I859), Tachydromia gilvipes Coquillett, I900 and Platypalpus xanthopodus Melander, I928 are synonyms of Platypalpus unguiculatus (Zett., I838), Platypalpus extricatus (Collin, I96I) is a synonym of Platypalpus Iongiseta (Zett., I842), Drapetis nigripes Zett., I859 is a synonym of Drapetis pusilla Loew, I859, Tachydromia parvicornis Zett., I859 is a synonym of Crossopalpus nigritellus (Zett., I842). A new name Platypalpus anomalinervis nom.nov. is proposed for Tachydromia curvinervis Collin, I94I (nec Zett., I842), described from Ussuri. Platypalpus candicans (Fall.) is still known only from the female sex, the recorded males are represented in Zetterstedt's Collection by males of Platypalpus longiseta (Zett.) (syn. extricatus Coll.) and Platypalpus stabilis (Coll.). Also Lundbeck (I9I0) described the male sex of P. candicans (Fall.) and P. major (Zett.) by mistake.