278 BALTIMORE ORIOLE. 



is 24^ inches long ; its diameter at the upper part about 4 twelfths, 

 towards the rectum 2^ twelfths. The coeca, which come off at the dis- 

 tance of 3 inches from the extremity, are 2 inches 8 twelfths long ; for 

 1 inch they have a width of only i twelfth, and in the rest of their 

 extent are of an oblong form, with their greatest diameter 8 twelfths, 

 their extremity rounded. 



The trachea is 4 inches long, flattened, 4^ twelfths in breadth at 

 the upper part, 3 twelfths at the lower ; its rings very feeble, being 

 but partially ossified, 72 in number, and 7 half rings. The contractor 

 or lateral muscles are strong, and besides the stemo-tracheals, there 

 is a pair of inferior laryngeal muscles going to the last ring of the tra- 

 chea, The bronchial half-rings are about 18. 



BULLOCK'S TROOPIAL. 



Icterus Bullockii, Swains. 



PLATE CCCCXXXIII. Youhg Male and Adult Female. Figs. 1, 2. 



The female and young male, as represented in this plate, have al- 

 ready been described at p. 11 of the present volume. I have only to 

 add that, according to Dr Townsend, the male measures 7^ inches in 

 length, and 11 in the extent of its wings. 



BALTIMORE ORIOLE. 



Icterus Baltimore, Daudin. 



PLATE CCCCXXXIII. Adult Female. 



AccoKDiNG to Dr Richardson this species ranges through the cen- 

 tral districts of the Fur Coimtries up to the 55th degree of latitude, 

 arriving on the Saskatchewan plains on the 10th of May. At this pe- 

 riod I saw it breeding and abundant in the Texas ; but none were ob- 

 served by me in Labrador or Newfoundland. I have ascertained to 

 my perfect satisfaction, that the males of this elegant species obtain 



