1.^87.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 99 



{lucidus), Loxops {eoccinea), aud Psittirosira, have the first (ninth) pri- 

 mary never shorter than the fifth, while in Oreomyza it is shorter than 

 the seventh, aud only slightly longer than the secondaries which in the 

 other genera fall short of the tips of the exterior primary by more than 

 the length of the hind toe without claw. I have examined carefully 

 both specimens of Oreomyza bairdi aud find they agree completely ; I 

 also find that the quills are fully grown, so that there is no chance of 

 their being undeveloped. 



Another important feature is the partial covering of the nasal fossae 

 by overhanging feathers, aud the absence of real bristles. In the speci- 

 mens of Loxops and Psittirostra before me, the nasal fossae are likewise 

 covered by autrorse feathers (in the cuts of the bills of these genera 

 in the tenth volume of Cat. B. Brit. Mus., pp. 40, 51, the nasal fossae 

 are represented as entirely bare), and the bristles, if present, but slightly 

 developed, while in the other genera strong and black bristles are seen 

 guarding the base of the upper mandible. 



The hind toe is better developed, and the tarsus comparatively 

 shorter than in the allied genera. Taken in connection with the rounded 

 shape of the wing and the comparative shortness of the tail, it seems 

 likely that the habits of the present form are more terrestrial than 

 those of the other Hawaiian Dicccidw. 



Oreomyza bairdi, sp. n. 



Akakane. 



Diagnosis. — Above clear olive-gray tinged with pale olive-green on 

 rump and margins of tail-feathers and secondaries ; underneath pale 

 olive-baft", nearly white on chin, throat, and under wang-coverts, tinged 

 with pale primrose-yellow on the fore neck, and suttVised with olive- 

 gray on the flanks ; lores whitish; ear-coverts like the upper parts. 



Dimensions (type specimen). — Wing, 65'"'" ; tail-feathers, 40'"'" ; ex- 

 posed culmen, 12'"'" ; tarsus, 20'"™ ; middle toe with claw, IG""" ; hind toe 

 without claw, lO'"™. 



Habitat. — Kauai, Hawaiian Islands. 



Tyjje.—U. S. Nat. Mus., Ko. 110049. Y. Knudsen coll. 



This species is so different from all the other Hawaiian Dicceidije as 

 to require no further comparison with either of them, as the generic 

 characters given above will suffice to distinguish it at once. 



The two birds which Mr. Knudsen collected in the mountains of 

 Kauai, and which \\q states to be male and female, are evidently adults, 

 as no trace of immaturity can be discovered. It seems that most of 

 the Hawaiian Dicceidce, and possibly all, have light tips to the wing- 

 coverts in the young plumage, but the specimens before me have these 

 coverts quite uniform. 



I have nothing to add to the above diagnosis by way of description, 

 except that the bill is light horny-bi"own above and pale underneath, 

 and that the feet are horny brown. Both specimens are quite alike, 



