60 EXPLORATIONS AND SURVEYS WEST OF IOOTH MERIDIAN. 

 HiRUNDiNiD^a (the Swallows). 



20. Hirundo Jwrreorum, Barton. Barn-Swallow. 

 Not very numerous. 



21. Petrochelidon, lunifrons, (Say.) Cliff- Swallow, 

 A few pairs only seen. 



22. Tachycineta thalassina, (Sw). Violet-green Swallow. 

 A few noted the 12th of May. 



23. Stelgidopteryx serripennis, (Aud.) 



A few seen along Cherry Creek the 6th of May. Common about the 

 12th. 



LANIID^E (the Shrikes). 



24. Collurio ludovicianus, (L.), var. excuMtoroides, Sw. White-rumped 



Shrike. 



Numerous individuals of this species were seen during the first days of 

 May, and apparently all were mated, and possibly nesting, though 1 did 

 not succeed in finding any nests. It has at this season quite a number 

 and variety of notes, some of which are the call-notes and common to 

 both sexes. The male also makes an occasional attempt at a song, and 

 the notes, though harsh, are not tmpleasing. 



(the Tanagers). 



25. Pyranga ludoviciana, (Wils.) Louisiana Tanager. 

 But a single individual seen, May 20. 



26. Pyranga cestiva^ (L.), var. cooperi, Eidg. Cooper's Tanager. 

 A single male shot May 10. 



FRINGKLLLIDJE (the Finches). 



27. Chrysomitris tristis, (L.) 



Very abundant in large flocks in the cottonwood-groves along the 

 Platte River. These fairly resounded with the twitterings and chirp- 



