1888.J PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



93 



FURTHER CONTRIBUTIONS TO THE HAWAIIAN AVIFAUNA. 

 BY LEONHARD STEJNEGER. 



Mr. Valdeinar Knudsen has again favored the National Museum 

 with an important collection of Hawaiian birds, consisting exclusively 

 of water-birds, all of particular interest. The collection contains a 

 species new to science, besides several additions to the Hawaiian fauna 



As in the foregoing collections received from the same source, most 

 of the specimens are from the island of Kauai, but, in addition, the pres- 

 ent one contains several examples from the neighboring Niihau, a small 

 island situated 13 miles southwest of Kauai. 



In the following paper all the measurements are in millimeters and 

 the nomenclature is that of the A. O. U. code. 



The native Hawaiian names are given on Mr. Knudsen's authority. 



Puffinus knudseni, sp. uov. 



Knudsen's Shearwater. 



Can kane. 



magnosis-TaSI nearly half as long as the wing, graduated for the 

 length of the tarsus,- nasal tubes short, about one-fifth the length of 

 the chord of culmen, raised above the level of the bill, inflated and 

 obliquely cut anteriorly; nostrils roundish and wholly visible from 

 above; nasal septum broad ; color above sooty grayish, scapulars and 

 interscapulars with paler more brownish margins; head, especially fore- 

 head, suffused with ashy, rump more blackish; ear-coverts like upper 

 parts ) lores and cheeks more ashy, gradually fading into the white of 

 the under parts; flanks, crissum, and under tail-coverts sooty like the 

 back; lining of wing white, axillaries gray ; bill (dried) horny reddish 

 Jgray tube, culmen, and nails blackish ; feet very pale horny vellowish 

 (probably yellowish flesh color m fresh bird), somewhat browner on the 

 ,outer side. 



I Dimensions of type specimen.-Wmg, 281— ; tail-feathers, 138'-" ; chord 

 icf exposed culmen, 37""»; tarsus, 46—; middle toe, with claw, 54—; 

 graduation of tail, 49 ,UIU . 



-EfaMfo/.— Hawaiian Islands. 



Type.-U. S. Nat. Mus., No. 113145; Kauai, Hawaiian Islands; Val- 

 uemar Knudsen, coll. 



Knudsen's Shearwater belongs to the subgeueric group usually called 

 mel ius " Gloger," * which is char acterized by the long and strongly 

 I • Gloger, in 1827 (Froriep's Notizen, xvi, p. 279), proposed the name Thyellas (uol 

 1 hyeUus) as a substitute for the barbarous Puffinus. This name cau uot be restricted 

 >o the Long-tailed Shearwaters, as noue of these species were known in 1827. As the 

 ;?ronp seems to be without a name, I would propose ThycUodroma (M&sMv = ff ale 

 .W<»/ = running) with Puffinus spkenurus for a type. 



