374 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Colonel Grayson gives (1. c.) the total length of the male, measured 

 fresh, to 7.90 inches. 



Wing formula. 



Hab. — Tres Marias Islands. 



Eemarks. — This insular race is distinguishable from the var. occidentalis 

 mainly by its less pointed wings and the longer first primary. In color, 

 the two races agree very well, except that the bird from the Tres Marias 

 Islands shows a faint olive wash all over. From both the other forms 

 it may be easily distinguished by the light edgings on the inner sec- 

 ondaries, and the very distinct white tip of the tail feathers, which is 

 to be found also on the three middle j)airs. It seems that this character 

 is constant, and that it does not depend on seasonal change or more or 

 less good state of the feathers. All the specimens, which I have exam- 

 ined, seem to have been collected in the winter', and the quills are in 

 all of them in a quite perfect state. 



WASHiNaTON, D. G., January 12, 1882. 



DESCRIPTIONS OF TM^O NE^V THRUSHES FROm THE UIVITED 



STATES. 



By ROBERT RIDOH'AY. 



2a. Hylocichla fuscescens salicicola subsp. nov. 



{Willow Thrush.) 



Turdus fuscescens Baird, B. N. Am. 1858, 922, 927 (Ft. Bridger, Wyoming) ; Eev. Am. 

 B. i, 1864, 17 (part; spec, from Ft. Bridger). — Allen, Bull. M. C.Z. iii, 

 1872, 155, 173 (Mts. of Colorado).— Eidgw. Bull. Essex Inst. 1873, 172 

 (Salt Lake Valley, Utah); Bull. Essex Inst. 1873, 179 (Colorado): ih. 

 1875, 35 (Frovo R., Utah); Orn. 40tli Paral. 1874, 398 (valleys of Bear, 

 Provo, and Weber R's, Utah; breeding). — Henshaw, Ann. Lye. N. Y. 

 ■ xi, 1874 (Utah); Rep. Wheeler's Exp. 1874, 39, 56, 71 (do.); Zool. 

 Wheeler's Exp. 1875, 148 (Denver & Ft. Garland, Colorado; breeding). — 

 COUES, B. N. W. 1874, 5 (part). 

 Turdus (Hylocichla) fuscescens CouES, B. Col. Val. 1878, 39 (part). 



Ch. — Similar to R. fuscescens, but averaging decidedly larger, the 

 upper parts much less tawny, and the jugulum less distinctly buff. 

 Wing, 3.80-4.25 (4.02); tail, 2.95-3.40 (3.20); culmen, .55-.60 (.57); tar- 

 sus, 1.15-1.28 (1.17); middle toe, .65-.75 (.69).* 



* Extreme and average measurements of 11 adults. 



