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

- the corpus phalangis in lateral view either not or only very slightly becomes thicker in proximal direction, - the crista plantaris medialis and cr. plant, lateralis on the distal part of the corpus are missing, and hence the corpus in lateral view tapers off here, - the sulcus intercondylaris is deep (dorsal view), - the dorso-distal edge of the condyli is elevated, the capitulum phalangis has got a protrusion (lateral view), - the dorsal side of capitulum phalangis in lateral view is either straight or concave. Falco columbarius: - the width of corpus phalangis is constant longitudinally, and slightly thicker than that of the Hobby (dorsal view), - the tuberculum extensorium in dorsal view is quadrangle, its sides are parallel, - the corpus phalangis in lateral view either not or only very slightly becomes thicker in proximal direction, - the crista plantaris medialis and cr. plant, lateralis on the distal part of the corpus are missing, and hence the corpus in lateral view tapers off here, - the sulcus intercondylaris is less deep (dorsal view), - the dorso-distal edge of the condyli is elevated, the capitulum phalangis has got a protrusion (lateral view), - the dorsal side of capitulum phalangis in lateral view is either straight or concave. Falco tinnunculus: - the phalanx is thick, - the dorsal edge of corpus phalangis in lateral view is strongly curved, especially so on the distal section, - the medial edge of the tuberculum extensorium is tilted (dorsal view), - the proximo-plantar part of corpus phalangis is strongly rounded, - the corpus phalangis in lateral view is getting strongly thicker in proximal direction, - the corpus phalangis on the distal part in lateral view is becoming only slightly or not at all thinner, the crista plantaris medialis and cr. plant, lateralis are on this part present, too, - the dorso-distal edge of the condyli is only slightly pointed, (lateral view), - the dorsal side of capitulum phalangis in lateral view is convex. Falco vespertinus: - the phalanx is short, - the corpus phalangis into proximal direction is getting constantly thicker in dorsal view, in lateral view it is becoming only slightly thicker, - the sulcus intercondylaris is shallow (dorsal view), - the capitulum phalangis in lateral view is arch shaped, its dorso distal edge is becoming only slightly or not at all pointed. Falco naumanni: - the phalanx is short, - the corpus phalangis on the proximo-plantar part is strongly hollow, - the corpus phalangis in lateral view is getting strongly thicker in proximal direction, - the sulcus intercondylaris is shallow (dorsal view), - the capitulum phalangis in lateral view is arch shaped, its dorso distal edge does not become pointed. 56