104 



THE WILSON BULLETIN— June, 1921 



as " chiefly east of the Allegheny Mountains, west to western New 

 York and Pennsylvania." and that of T. p. iliams as from western 

 Indiana westward over the prairies and plains, which distribution 

 was practically confirmed by the A. O. U. Committee in 1910, it 

 seemed highly unlikely that our common form of this species could 

 be palustris, yet obviously they were different from iliacits. To 

 answer this question a small series of specimens of each form was 

 sent to Dr. Oberholser for opinion, and he has returned all of the 

 lighter birds marked " iUacus " and the darker ones marked 

 " palustris." meaning, no doubt, that under the currently recog- 

 nized subspecies the Nebraska birds should be thus referred. This 

 will make T. p. palustris an addition to the list of the birds of the 

 state. 



It must be noted, however, that Nebraska " palustris " have on 

 the average a slightly longer wing and tail and a distinctly shorter 

 culmen than typical palustris as defined by Ridgway. and also that 

 Nebraska " iliacus " have a shorter culmen than the measurements 

 of iliacus given by Ridgway, though in other measurements they 

 are practically the same. Thus the supposed slight differences in 

 size between the two forms pratically disappear so far as Ne- 

 braska specimens are concerned, as the following table will show: 



Depth of 

 Length Wing Tail Cul. Bill Tar. 

 1919 c? Ad. 125 53.0 45.0 

 1919 c? Ad. 122 



1916 c? Ad. 119 



1917 J' Ad. 126 

 Nebr. City. Nebr., Nov. 2, 1901 ^ Ad. 120 

 Lincoln, Nebr., Sept. 8, 1908 c? Ad. 122 



" palustris " 

 Lincoln, Nebr., May 

 Lincoln. Nebr., Sept. 

 Lincoln, Nebr., Apr. 

 Lincoln, Nebr., May 



53.0 

 52.5 

 52.0 

 51.0 

 50.0 



42.0 

 45.5 

 43.0 

 39.0 

 41.0 



13.0 

 13.5 

 14.2 

 13.4 

 12.0 

 12.0 



3.1 

 3.5 

 3.4 

 3.0 

 3.0 

 3.0 



19.5 

 20.0 

 19.V 

 20.0 

 18.5 

 18.5 



Average of 6 c? d': 



" iliacus " 

 Havelock, Nebr.. Apr. 20. 1901 c? Ad. 

 Lincoln, Nebr., Sept. 28. 1901 c^ Ad. 

 Lincoln. Nebr.. Apr. 24. 1903 (^ Ad. 

 Lincoln, Nebr., Sept. 12. 1902 c? Ad. 



122 51.9 42.6 13.0 3.1 19.0 



127 

 127 

 120 

 117 



54.0 

 52.5 

 52.5 

 51.5 



47.0 

 465 

 43.8 

 42.0 



13.1 

 13.0 

 13.0 

 13.0 



3.0 19.0 



3.0 18.5 



3.3 18.5 



3.2 18.0 



Lincoln, Nebr., Sept. 12, 1902 c^ Ad. 117 51.5 42.0 13.0 3.2 18.0 



Average of 5 d* d": 122 52.5 44.3 13.0 3.1 18.5 



Measurements of adult c^ c? given by Ridgway: 



T. p. palustris 



Length Wing Tail Culmen 



103-117.5 (110) 48-54 (50.6) 38.5-46.5 (41.4) 14-15.5 (14.7) 



T. p. iliacus 



110-127.5 (116.1) 49.5-56 (52.3) 40.5-46.5 (43.6) 13-15.5 (14-4) 



Measurements of adult Nebraska c? c?: 



Nebraska " palustris " 



119-126 (122) 50-53 (51.9) 39-45.5 (42.6) 12-14.2 (13.0) 



Nebraska " iliacus " 



117-127 (122) 51.5-54 (52.5) 42-47 (44.3) 13-13.1 (13.0) 



