288 MONTGOMERY. [Vou. XII. 
(PABLED OV LI. 
Comparative tabulation of percentage of species examined, with variation in the 
length of the ¢arsus of at least 2%. 


+ 3 z 
FamIiy. E oe 0% 10% | 20% | 30% | 40% | 50% 
Zs § 
Vireonidz 14 fe) 
Paridze 20 fe) 
Tyrannidee 34 ° 
Icteridz 2 fe) 
Fringillidz 99 
Corvidze 34 
Turdidz 25 
Mniotiltidz 18 
Rallidze 16 
Troglodytide | 46 
Falconidz 78 | 
TABLE XVIII. 
Comparative tabulation of percentage of species examined, with variation in the 
whole length of at least 2%.1 



he ies 
Famity. E oo 0% 5% 1% 
ag 
aa 
Picidze 31 3:2 
Tyrannidz 28 7-1 
Icteridz 39 
Fringillidze 118 
Vireonidz 16 
Falconidee 53 
Paridz 22 
Turdidz 20 
Corvidee 34 
Troglodytide | 34 
Mniotiltidze 53 
Rallidze 12 




1 Whenever a species has been considered in the calculations of Tables XV-XVIII, for which 
Ridgway gives the extremes of variation in a particular dimension separately for the sexes, I have 
computed and added the percentage of each sex as an equivalent to that of a species. This method 
would hardly impede the general accuracy of the percentages. 
