OCR Text |
Show 660 DR. H. GADOW ON THE REMIGES OF BIRDS. [Dec. 18, hidden by the outer vane of the 9th primary. This shifting explains the conditions which are the rule amongst the birds of Group D. The 11th primary undergoes a similar dislocation in a more marked degree. Group A.-With 10 long primaries. The 10th quill is, with few exceptions (e. g. Hylactes), very little shortened, and partakes of the formation of the tip of the wing. The 11th quill is frequently present, although small and hidden. When it is absent, at least its upper covert is present as a stiff and well-developed little feather. To this group belong all the Passeres non-oscines. I. PSEUDOSCINES ... II. DESMODACTYLI... III. OLIGOMYODI ... IV. TltACHEOPHON-E Menura Euryhemus Oalyptomena Pitta Philepitta Pipra Rupicola (1) Tityra (2) Metopia Querula Xiphnlena Cotinga Hadrostomus Lipaugus Ampelion Phibalura Phcenicocercus (3)... Phytotoma Tyrannus Milvulus Pitangus Formicariida; Furnariidse Pteroptochidae (4)... Dendrocolaptidas ... Xlth quill. 1'5 cm. long. Very small. + ? * + ) J + - - J | Wings rounded off; the 11th [• quill and its upper covert are I soft and broad. (1) Rupicola, 8- The 10th primary is somewhat shortened and suddenly narrowed near its end. (2) Tityra, 8 • The 9th primary is much narrowed, and considerably shorter than either the 10th or 8th. In T. brasiliensis it is only half the length of the neighbouring quills. Young males and females have their quills regularly developed. (3) Phcenicocercus, 8- The 7th }3rimary is suddenly narrowed at its distal portion, and considerably shorter than the neighbouring quills. (4) Hylactes differs from the Pteroptochida. in its rounded-off wings ; the 10th primary is short, the 11th is absent, but its upper covert is still present. |