NATURAL SCIENCES OF PHILADELPHIA. 381 



Mas nupt. temp, uropygio rosaceo, pectore carmesino. 



Fein, et mas juv. pectore albido fusco-striato. 



Long. 5.25 poll. ; alar. lat. 9.00 ; ala .2.90 ; cauda 2.35 ; rostr. 0,35 ; tars. 

 0.58 ; dig. med. 0.36 ; ung. 0.20. 



Habitat. Amer. Sept. bor. et orient. 



A detailed description of the present species, with the points in which it 

 differs from the Unarms, has already appeared in the Proceedings of the 

 Academy, as above, and there is consequently no necessity for giving them 

 here. A comparison with the A. roslratus, and the differences from that spe- 

 cies, will be found under the latter head. The following additional remarks 

 may aid in elucidating the characters of the species. 



A small series of specimens from Moose Factory, Hudson's Bay, differ 

 slightly from the Labrador types in a more elongated bill. The bill, however, 

 still preserves the stoutness, and the dusky color of the present species, and 

 the other characters agree strictly with my original specimens. 



Several specimens have been received from Forts Resolution and Simpson, 

 collected by Mr. Robert Kennicott, which agree in the most minute particulars 

 with the Labrador types. Indeed, so far as we can judge from a series of 

 twelve specimens from various localities in northern North America, the char- 

 acters of the species are more constant than in any other of the genus, show- 

 ing little or no tendency towards those of Imarins, from which there is not the 

 slightest difficulty in distinguishing it. 



The figures given by Audubon in his " Linaria minor Ray,'' come much nearer 

 to the present species than to the A. Unarms. Moreover, we find in the col- 

 lection two specimens which were received from Mr. Audubon, and which 

 were quite probably the originals of the plate. The description, however, is 

 undoubtedly that of the true Unarms. 



JEgiothus rufescens (Vieill.) Cab. 



Fringilla linaria, Temminck, Man. Orn. 1835, 267. Nee Linn. Nee Temm. 



1820. 

 Fringilla rufescens, Vieill., Faun. Franq. 83, tab. 41, fig. 1, fide Temm. Id. Diet. 



Nouv. 1817, xxxi. 342. 

 Linaria rufescens, Bp. et Schl. Monogr. Lox. 1850, 50, tab. 54. 

 " Linaria minor, Ray, Gould, Birds Eur. 1843, iii. tab. 194,'' secundum Bp. et 



Schl. 

 Linaria fiavirostris, septentrionalis, canigularis, Brehm, Vog. Deuts. sec. Bp. 

 Linaria rubra Gesn.; L. minima Br. fide Bp. 

 Linota linaria Bon. Comp. List, 1838, sec. Bp. 



Diag. A. JEgiotho linario simillimus, sed minor, (long. 4.50 poll.) et cauda 

 breviore, vix bipollicari, uropygio plus minus ruf'escente, fusco-striato. Long. 

 4 6-12 poll. ; ala 2 6-12 ad 7 -12 ; caud. 2 ; rostr. 3.J-12 ; tars. 5i-12; dig. 

 med. 3J-12. 



Hab. Europ. 



The above diagnosis, taken chiefly from Bonaparte, is that of a European 

 species, admitted by most modern ornithologists. Following the usual c ustom , 

 we present it as distinct, though, it must be confessed, not without some doubts 

 as to the entire propriety of such a procedure. The characters of the species, 

 as given in the diagnosis, certainly show very slight differences from the Una- 

 rms. The distinctive features lie entirely in the smaller size, somewhar 

 shorter tail, and, as the name indicates, a general reddish tinge, especially on 

 the rump. But as is well known to be the case in this genus, the young of all 

 the species have this reddish or yellowish suffusion; and in none is it more 

 marked than in the Unarms. A specimen of Unarms from North America now 

 before me, compared with a rufescens from Europe, has the rufous tinge every- 

 where much stronger than in the European bird, especially on the rump. We 



1861.] 



