186 



ORNITHOLOGICAL EXPLORATIONS. 



The difference between the iulults will be best uiulerstood from the 

 colored drawings (pi. viii, figs. 1 and 2), and no further remarks are 

 thought necessary, except perhaps, that the irides in the adult are 

 totally different colored, being brownish in iirUe, while green mpelagicus. 



The color of the plumage and its general characters are pretty much 

 the same in both species, except that the purplish bronzy gloss on the 

 scapulars is stronger and more violet in itrile than in pclagicus, and that 

 the latter has a more imrplish tinge on the upper neck. 



Before leaving the subject I may perhaps mention a structural char- 

 acter which I noted in the fresh birds, viz, that in urile the outer — 

 longest — toe is proportionally much longer than in peJagicus, its last 

 joint reaching considerably beyond the tip of the nail of the middle toe, 

 while in the latter species the end of the nail just reaches the joint. 



I had no opportunities of investigating the changes of plumage and 

 the moult of the present species. The extensive series in the JSTational 

 Museum enables me, however, to state that the changes exactly cor- 

 j?espond to those of the following species as examined by me. A de- 

 tailed account of these observations will be found under the heading 

 of that species. 



List of sjyecimens collected. 



No. 9J877.— Iris liftlit, of a " raw umber" rolor. liill, a ujiper mandible brownisli-black, witli a stripe 

 on culiiien, flames on tlie sides, and at base liorny, yellovvisli wliito, at base, blue; lower mandible 

 horny yellowish; tip bhickish ; base faint bluish. Fon-head, lores, and cye-iegiou, naked and 

 sninolh, nud bright orange, connected with the rugated watlles which are orange-red and encircle 

 the gular sac by a narrow oiangecoloreii strii>e behind the mouth ; the soft part.s next to tlu^ bill all 

 •round and the guhir sac of a blight blue, tinged with violet, and deepening in color from the forehead 

 .iown to the gular sic. I''e. t uniformly brownish black williout i'.iiy kind of spots or niotthng. 

 Interior of nioulli liloe. Not fat. Weight, 5 pounds. 



No. 9287!^. — liis as 171 the foregoing specimen. Bill dark horny luown, towards bat'o as also the 

 naked parts of the face light flesh-color, with a faint tinge of blui.--h on tlie lower mandible; the eye- 

 ring with an olive liuge. Keet uniformly browni.sli bhick ; webs ligbfcj-, dark brownish, without 

 blotchings. Weight, 4. G pounds. 



No. 9287!). — Shin of body whitish next to f lie lower Tuandible, violet blackish on the rest of lii^ body, 

 somewhat lighter on the fi^et, and still more so <in the belly and ibe inside of the tibia;. 



The inhabitiints of the islands distinguish the iiresent si)ecies as 

 ^'■BohchoJ UrW'' in contradistinctioii to the ^^ MaUnJcij ?7n7," which is 



