Folia Historico-Naturalia Musei Matraensis - A Mátra Múzeum Természetrajzi Közleményei 21. (1996)

- the condylus medialis on the plantar side in proximal direction is short, and attaches to the corpus very suddenly, - the condylus lateralis on the plantar side is pointed, short in proximal direction. Falco columbarius: - the phalanx is more or less long, - the contours of corpus phalangis are parallel in dorsal view, - the length difference between the distal edges of the condyli is great (dorsal view), - the plantar appendix of condylus medialis is strongly bending in medial direction, and the plantar part of the condylus is attaches to the corpus gradually (medial view), - the condylus lateralis on the plantar side extends long backwards in proximal direction (lateral view). Falco tinnunculus: - the phalanx is relatively short and thick, - the length difference between the distal edges of the condyli is small, the sulcus intercondylaris is deep (dorsal view), - the condylus medialis on the plantar side is blunt (medial view), - the condylus lateralis is high in dorso-plantar direction, and on the plantar side extends long backwards in proximal direction (lateral view). Falco vespertinus. - the phalanx is short, more or less thin, - there is practically no rim on the distal edge of the condylus lateralis, the length difference between the distal edges of the condyli is great (dorsal view), - the condylus medialis on the plantar side is pointed, short in proximal direction, and attaches to the corpus very suddenly (medial view), - the condylus lateralis is low in dorso-plantar direction, and on the plantar side extends long backwards in proximal direction and gradually tapering off as attaches to the corpus (lateral view). Falco naumanni: - the phalanx is short, thick, - there is a bigger rim on the distal edge of the condylus lateralis, and hence the length difference between the distal edges of the condyli is small, the sulcus intercondylaris is formed (dorsal view), - the condylus lateralis is low in dorso-plantar direction, and on the plantar side extends shortly backwards in proximal direction (lateral view). Phalanx 2 digiti 4 posterior In the case of the phalanx 2 dig. 4 post, compared to the formerly discussed phalanx the length difference becomes more pronounced between the species (Plate XXXIII, Figure 1). The phalanx of the Hobby is considerably longer than that of the other species, does not overlap with the measures of the Kestrel, and only overlaps with the females of Merlin. The phalanx of the Kestrel is very short, and hence its length overlaps with the Merlin and Red-footed Falcon. The phalanx of the Lesser Kestrel is the shortest, but it is short in comparison as well, because - differently from the former phalanges - does not reach even the length of the Red-footed Falcon's phalanx. The ratio of the length of the phalanx and the width of the corpus phalangis (GL/CW) is highest in the Hobby, and separates even from the Merlin. In the Kestrel as a consequence of 62