42 EXPLORATIONS AND SURVEYS WEST OF iOOTH MERIDIAN. 



31. Dendroica Nackburnice (Gin.) Blackburuian Warbler. 

 u Not common. Ogden. September. 7 ' (Allen.) 



32(?). Dendroica nigrescens (Towns.) Black-throated Gray Warbler. 

 Ogden. September. (Allen.) 



*33. Geotlilypis Philadelphia (Wils.), var. macgillivrayij Aud. Macgilli- 

 vray's Warbler. 

 Common in the mountains. 



*34. Geotlilypis tricJias (L.) Maryland Yellowthroat. 



Common. Distributed generally through the valleys of the Territory, 

 in the neighborhood of water. 



*35. Icteria virens (L.), var. longicauda^ Lawr. Long-tailed Chat. 



Common. Inhabiting indifferently the thickets of foot-hills and val- 

 leys. 



36. Myiodioctes pusillus (Wils.) Wilson's Blackcap. 

 Common as a spring and autumn migrant. 



*37. Setophaga ruticilla (L.) Eedstart. 

 Bather common as an inhabitant of the mountains and valles. 



(the Swallows). 



*38. Progne subis (L.) Purple Martin. 



Quite abundant in the mountains, frequenting aspen -groves. 



*39. PetrocJieUdon lunifrons (Say). Cliff-Swallow. 



Yery abundant in the mountains. Breeds in large colonies on the 

 cliffs. 



*40. Hirundo liorreorum Bart. Barn-Swallow. 

 Common. Builds in barns, deserted shanties, and caves. 



*41. TacJiycineta Mcolor (Yieill.) White-bellied Swallow. 



Abundant. Generally distributed. Breeds in the aspen-groves in 

 company with the martins. 



. Tacliycineta thalassina (Swains.) Yiolet-green Swallow. 

 Somewhat rare. Breeds in limestone-cliffs with the White-throated 

 Swift (Panyptila saxatilis) and the Cliff-Swallow. (Eidgway.) 



*43. Cotyle riparia (L.) Bank-Swallow. 



Quite common at Provo. Breeds in the river-banks in company with 

 the Kough-winged Swallow (Stelgidopteryx serripennis). 



44. Stelgidopteryx serripennis (Aud.) Bough-winged Swallow. 



Far more numerous than the preceding, with which it is associated. 



YIREONID^E (the Greeulets). 



45. Vireo olivaceus (L.) Bed-eyed Yireo. 



Quite common at Ogden in September. (Allen.) 



