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Show 4 58 MESSRS. SCLATER AND SALVIN [June 2o, variegatis : subalaribus rufis : long, tota 10*5, alee 5-8, caudee rostri a rictu 1*15, tarsi 1*65, dig. med. cum ungue 1*6. Hab. accidentaliter in America boreali (Baird). Genus 5. THYRORHINA*. THYRORHINA SCHOMBURGKI. Crex schomburgki, Cab. in Schomb. Guian. ii. p. 245, et iu. p. 760; Scl. & Salv. P. Z. S. 1868, p. 169. 31icropygia schomburgki, Bp. C. R. xliii. p. 599. Supra olivacea albo guttata, his maculis albis nigro circumdatis : subtus rubiginosa, gula albicante, abdomine medio albo: rostro corneo, mandibulee apice flavo : pedibus aurantiacis : long, tota 5*0, alee 3*3, caudce 1*4, rostri a rictu 0*6, tarsi 0*85, dig. med. cum ungue 0*9. Hab. Brit. Guiana (Schomb.); Venezuela, Caripe (Goering); Caraccas (Levraud, in 31us. Paris.). 3Ius. S. & G. Fig. 1. Head of Thyrorhina schomburgki. The peculiar form of the nasal openings, which are partly covered over in front by a horny membrane and are completely divided from each other by a median septum, induces us to refer this species to a new genus, these characters not occurring in any other American form of Rallince. In other respects this little Crake agrees generally with the smaller American species of Porzana. The form of the wing corresponds nearly with that of P. noveboracensis, the second and next three following primaries being nearly equal and longest, and the external secondaries elongated, so as to be longer than the outer primary. The toes are slender, the middle toe with its nail hardly exceeding the tarsus in length. The tibiee are feathered nearly down to the joint. The tail is rather longer than is usual among the smaller Rallidce, and not so much concealed by the coverts. Dr. Schlegel's Porzana schomburgki (Mus. des P. B. Ralli, p. 37) can hardly be of this species, if his description is correctf. It would appear to be more like Sclater's P. erythrops, to which, therefore, we have provisionally referred it. * 8vpds, porta, et pis, nasus. t Dessus d'un brun olivatre. Dessous gris d'ardoise; bas ventre et souscaudales noires avec des bandelettes blanches. |
