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

- on the dorsal side, proximally from the capitulum phalangis there is almost no incurvation (lateral view). Falco tinnunculus: - the phalanx is short and thick, - the plantar side in lateral view is arched, - the capitulum phalangis is large, and is arched in lateral view, - the distal edges of the condylus medialis and cond. lateralis extend approximately till the same line (dorsal view), - the tuberculum intercondylare dorsale is missing, - the dorsal edge of the capitulum phalangis extends well over the dorsal line of the corpus (lateral view), - on the dorsal side, proximally from the capitulum phalangis there is a strong incurvation (lateral view). Falco vespertinus: - the phalanx is short, more or less thin, - the plantar side till the capitulum phalangis is straight (lateral view), - the distal edges of the condylus medialis extends much further than that of the cond. lateralis (dorsal view), - the tuberculum intercondylare dorsale is small but visible, - the dorsal edge of the capitulum phalangis extends well over the dorsal line of the corpus (lateral view), - on the dorsal side, proximally from the capitulum phalangis the incurvation is strongest in this species (lateral view). Falco naumanni: - the phalanx is the smallest, short and relatively thick, - the plantar side is arched (lateral view), - the capitulum phalangis is relatively large, and is arched in lateral view, - the dorsal edge of the capitulum phalangis extends well over the dorsal line of the corpus (lateral view), - on the dorsal side, proximally from the capitulum phalangis there is a strong incurvation (lateral view). Phalanx 4 digiti 4 posterior For this phalanx all the information given for the phalanx 2 dig. 2 post, are relevant with the alterations indicated at phalanx 3 dig. 3 post. (Plate XXXIII, Figure 1). Phalanx 5 digiti 4 posterior For the talon of the 4th toe the morphological characteristics described at phalanx 2 dig. 1 post, are relevant, but in the measures the order of the species is sometimes changed. The talon of the Kestrel still remains the longest, but the talon of the Hobby is slightly longer on this toe than that of the Merlin. The maximum values of the Red-footed Falcon and Lesser Kestrel are reaching the lower boundary of measures of the other species. The ratio of the height and width of the proximal end of the bone (PH/PW) is the highest in the Hobby and Red-footed Falcon, as the end of the bone is the narrowest in these species. Then the Merlin follows. This ratio is the lowest in the Kestrel, as the end of the bone is the widest in this species. 65