ISG PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



band of brownish black, another band of dull white clouded with 

 mouse gray, still another of brownish black, and a relatively narrow 

 paler tip of drab, between pale drab and avellaneous; primaries and 

 secondaries brownish black, with two or three broad lighter bars, 

 these dark brown, between ohve brown and clove brown, on the 

 outer webs, but changing partly or even largely to white mottled 

 with the same brown on the inner side of the inner webs; tertials 

 between ohve brown and clove brown, more or less barred obscurely 

 with a darker shade; aU the wing-quills tipped with dull white; 

 lesser wing-coverts brownish black, each feather with two white 

 roundish terminal spots ; median and greater coverts brown, between 

 olive brown and clove brown, with obsolescent, in many cases broken, 

 bars of darker, and two or more irregular terminal white markings 

 on each feather, these spots varying much in size; lores and orbital 

 ring naked, with but a few black hairs; supra-auricular region black 

 Uke the crown; extreme anterior portion of chin and anterior end of 

 malar stripe brownish black, the latter passing posteriorly into the 

 blackish clove brown of cheeks and auricular region; rest of lower 

 surface clove brown, lighter and shading toward olive brown on breast, 

 sides of neck, and longest under tail-coverts, the chin, thi'oat, and 

 jugulum practically immaculate, with but an occasional small round- 

 ish spot of white ; the breast and abdomen thickly marked with large 

 roundish spots of white, these usually 10 or 12 on each feather, and 

 mostly in pairs; the thighs and crissum with large more or less quad- 

 rangular pairs of white spots that almost coalesce into bars and 

 occupy a relatively much larger portion of each feather than do the 

 markings on the abdomen, thus producing a lighter general effect; 

 axillars dark ohve brown, with several pairs of large white spots; 

 under wing-coverts varying from ohve brown to brownish black, 

 very heavily spotted and barred with white; ''bill leaden, tip black." 



This newly discovered race is apparently most closely aUied to the 

 Sumatran bird, which is true Spilornis bassus. The difference in 

 size is chiefly in the biU, and otherwise is not very great, but the color 

 characters separate it without difficulty. The Bawean bird is so 

 much larger and darker than the Bornean Spilornis pallidus that it 

 scarcely needs comparison. 



The four birds obtained by Doctor Abbott are aU adults in good 

 plumage. Two of them, including the type, are in the regular brown 

 phase of plumage; and the colors of the soft parts of the one other 

 than the type, were, as indicated on the label: ''IrisyeUow; naked 

 skin about eye yellow; feet dirty yellow." The two other birds are 

 in the curious light phase, known in only a few forms of the genus, 

 but apparently a true color phase, as this condition is certainly not 

 due to age, sex, or season. It is characterized by a white head and 

 lower parts and is very strikingly different from the normal phase. 

 It is described below: 



