370 



BULLETIN OF THE 



given in Table Hi are based were not taken at the seasons likely to 

 give the greatest differences, the northern specimens having been taken 

 in summer and the southern ones in winter. Had summer Florida 

 specimens been used instead of winter specimens, the differences would 

 have been doubtless much greater, since in some eases, and especially 

 in the cases of Agelceus phoeniceus and Quiscalus purpureus, the sum- 

 mer home of a part at least of the Florida specimens must have been 

 somewhat to the northward of Florida. 



I. Table showing the Average Dimensions of Thirty-two Species of 

 American Birds, based on Measurements of Thirteen to Sixty-five 

 Specimens of each Species. 



Species. 



Turdus Swainsoni . 

 Turdua Pallasi . . . 

 Turdus fuscescens . . . 

 Ilarporhynchus rufus 

 Mini us polyglottus . . . 

 Galeoscoptes earoliuensis 



Sialia sialis 



Geothlypis triehas . . . 

 Parus atricapillus . . 

 Tyrannus carolinensia . . 

 Pyranga rubra . . 

 Troglodytes aedon . . 

 Passerculus savanna 

 Peucaaa aestivalis 



Cardinalis virginianu3 



Pipilo erythrophthalmus \ 



Hedymeles ludoviciana 

 Icterus Baltimore 

 Dolichonyx oryzivorus 



Agelajus phoeniceus j 



Sturnella ludoviciana . 



Quiscalus purpureus 



Quiscalus major . . 



Cyanura cristata 

 Cyanocitta florMana 

 Hylotomus pileatus 

 Picus borealis . . 

 Colaptes auratus 

 Conurus carolinensig 



Oxtyx virginianus . 

 Sterna hirundo . 



Locality. 



Massachusetts 

 Florida . . . 



Massachusetts 



Florida . 



Illinois . . . 

 Florida . . 

 Illinois . . . 

 Florida . . . 

 Massachusetts 



Suuthem New England 



Florida 



Southern New England 



Eastern Massachusetts 

 Southern New England 



Florida . .... 

 Massachusetts . . . 

 Florida 



Southern New England 



Florida 



Southern New England 



Northern States 

 Florida . . . 

 Northern States 

 Florida . 

 Northern States 

 Florida 



Northern States 

 Florida . . . 



Tf65 '~S\86 

 11 17 3.07 

 11 83 3-2 

 13.09 4.15 

 13.69 428 

 11.16 3.53 



11.93 

 693 

 8.37 

 13.77 

 11.33 

 t; oi 



11.27 



11 32 

 9.88 



12 15 



11.67 



14.71 



12.24 



15 70 

 14.43 



15.70 

 11 13 

 14.09 



22 18 

 1704 



0.-7 

 15 11 



3.94 

 2.17 

 2.47 

 4 49 

 3 76 

 2.05 



5 7* 2.70 

 8 99 2 in 

 11.43 3.63 



3 53 

 3 43 

 3.13 

 3 93 

 3 71 

 3.78 

 1.69 



3 86 



4 91 

 447 

 I 29 



14.09 I 21 



1 91 

 1 17 



4 •» 

 7 19 

 5.67 



5.13 



4 7.", 



14 44 4 41 

 28 07 21 

 26.80 8 98 

 14.46 4.71 



1 B 82 5 8 1 



21 70 7 59 



15 44 4 47 

 14.16 4 22 

 15 10 4.36 

 It 02 4 17 

 30.72 10.47 

 30.59 1057 



