552 Mr. J. H. Gumey's Notes on 



occasionally invade the normally rufous portion of the other 

 rectrices, and especially of the pair next to the outer ones. 

 A.11 these variations seem to me to partake of the character 

 of individual peculiarities, and to be but little, if at all, due 

 either to age or to locality. 



In the females of T. sparverius the longitudinal markings 

 on the under surface are more distinct and better defined in 

 some specimens than in others, the latter being probably the 

 younger birds ; there are also differences in the extent of the 

 rufous on the crown of the head, and, though not to any 

 great extent, in the narrowness of the dark transverse bars 

 on the mantle, and still more of those on the tail ; but all 

 these differences, except the first, seem to me to be due to 

 individual peculiarities rather than to differences of age. 



I subjoin a few measurements of T. sparverius from various 

 localities, all taken by myself from specimens in the Norwich 

 Museum and in the collection of Messrs. Salvin andGodman, 

 with the exception of one copied from Mr. Ridgway^s work 

 for the sake of comparison. In this and in subsequent tables 

 of measurements I have indicated by initials the collections 

 in which the several specimens measured are preserved. 



T. sparverius. 



Males (adiilt, except where otherwise noted). 



Depth of 

 subter- 

 Middle minal bar 



Wing. Tarsus, toe s. u. Culmen. on tail, 

 in. in. in. in. in. 



Hudson's Bay (N. M.) .... 7-70 1-50 1-00 0-50 1-00 

 Vancouver Island (N. M.) . . 7-40 1-35 0-95 0-50 0-90 • 

 Monterey, California (N. M.) 7-90 1-60 0-95 0-50 1-00 



Gallina, Illinois (N. M.) 7-50 1-50 0'90 0-50 1-10 



Washington (coll. S. & G.) . . 7-70 1-50 0-90 0-55 1-20 

 Valley of Mexico (coll. S.&G.) 8-00 1-40 1-00 0-50 0-65 



Orizaba, Mexico (N. M.) 7-60 1-40 090 0-45 0-70 



Oaxaca, Mexico (k. M.) ... . 7-80 1-50 0-90 0-45 0-90 

 Northern Yucatan (coll. S. 



&G.) 7-50 1-40 1-00 0-45 0-70 



Yucatan (N. M.) 7-50 1-50 1-00 0-50 0-70 



Belize, Brit. Honduras (coll. 



S.&G) 7-GO 1-45 1-00 0-55 1-00 



