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

47 - the area interarticularis and the faciès articularis lateralis in proximal direction is high, - the cranial part of the condylus " ^ djameter of CQndylus media]is lateralis is small _ ig significantly larger than that of - the arch of lateral crista sulci is ^ d j lateralis (di ^ yiew) flattened, J - the cranial part of the condylus medialis is diverging outwards into medial direction strongly. Falco eleonorae: - the tibiotarsus is relatively short, the bone ends are big. Falco tinnunculus: - the tibiotarsus is long, the proximal end is relatively small, - the crista patellaris is high in proximal direction, at the same time the crista interna is low (cranial view), - the corpus tibiotarsi at the distal bone end is a little bit flattened (the CW/CT value is high), - the lateral pons supratendineus is wide (distal bone end, cranial side), - the distal bone end is high (DH value), - the cranial part of the condylus I lateralis is large ™

е diameter of condylus medialis - the arch of lateral crista sulci is ~ is significantly larger than that of strongly rounded, the cond

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lus lateralis (distal view) Falco vespertinus: - the tibiotarsus is short, the corpus is narrow, - the proximal end of the bone is relatively large (PT value), and the distal end is small, - the crista patellaris is waving, - the crista interna is relatively highest here among the Kestrels, - the lateral pons supratendineus is narrow (distal bone end, cranial side), - the cranial part of the condylus lateralis is relatively large, the diameter of condylus medialis and condylus lateralis is approximately equal (distal view). Falco naumanni. - the tibiotarsus is short, the corpus is relatively wide, - the proximal end of the bone is relatively small, and the distal end is large, - the crista patellaris is high in proximal direction, the crista interna is low, - the lateral pons supratendineus is narrow (distal bone end, cranial side), - the cranial part of the condylus lateralis is large, the diameter of condylus medialis and condylus lateralis is approximately equal (distal view). Tarsometatarsus The Hobby has comparatively short tarsometatarsus, while the Kestrel has markedly long one, the difference is so striking that the length measures of the two species do not overlap at all. The quite long tarsometatarsus of the Merlin on the other hand do overlap with both of the above mentioned species, the measures of the males overlap with the Hobby, while that of the females overlap with the Kestrel. The very short tarsometatarsus of the Red-footed Falcon and Lesser Kestrel is clearly separated without overlapping from the measures of all the other species. Among the latter two species the tarsometatarsus - in contrast to the formerly discussed bones - of the Lesser Kestrel is longer (Plate XXVII, Figure 1). Most of the diameter measures in the case of Hobby, Merlin and Kestrel are more or less