-REPORT UPON ORNITHOLOGICAL SPECIMENS. 



18. Dendroica audiibonii (Towns.) Audubon's Warbler. 



This species was a moderately common one in the pine-region from 

 about 9,000 feet upward. By the 1st of June all were paired, and on 

 the 3d I saw a female just beginning a nest in the top of a small spruce, 

 some thirty feet from the ground. This was finished June 8, but no eggs 

 had been laid, and 1 was forced to content myself with the nest alone. 

 Outwardly it was composed of strips of bark firmly and neatly woven, 

 and lined with line grasses. It has an external diameter of four inches 

 and is one inch deep. 



19. Dendroica niyrescens (Towns.) Black-throated Gray Warbler. 



A warbler was seen June 25 in a grove of pine-trees on the sides of a 

 narrow canon, which I am quite confident was of this species. It had 

 a short, feeble, but rather pleasing song, which it constantly emitted at 

 short intervals as it flew from tree to tree. Owing to its shyness, I did 

 not succeed in capturing it. 



20. Geothlypis macgillivrayi (And.) Macgillivray's Warbler. 

 Somewhat common along the streams; not observed at a higher alti- 

 tude than 9,000 feet ; keeps much in the swampy thickets, where it 

 searches industriously under fallen logs and among the dead leaves for 

 insects, occasionally pausing in its labors to warble its short pleasing 

 song. 



21. Myiodloctes pmillus (Wils.) Green Black-capped Flycatcher. 



During the last days of May a few stragglers were seen among the 

 cotton woods, apparently still on their way northward. Perhaps a few 

 remain to breed. 



22. Setopkaga ruticilla (L.) Redstart. 



Not met with at Garland, nor earlier at Denver, but numbers seen 

 May 23 on the Huerfano River, eighty miles northeast of Garland. 



HIRTJNDINID^E (the Swallows). 



23. Petroclielidon lunifrons (Say.) Cliff-Swallow. 



In large numbers, building under the eaves of the post quarters. I 

 noticed here a very curious departure from the usual method of con- 



