1922] Swarth: Birds and Mammals of the Stikine Region 153 



13. Zonotrichia leueophrys gambeli 



14. Spizella passerina passerina 



15. Taehycineta thalassina lepida 



16. Dendroioa aestiva aestiva 



17. Penthestes atricapillus septentrionalis 



18. Hylocichla ustulata swainsoni 



19. Hyloeichla guttata guttata 



20. Planestieus migratorius migratorius 



21. Sialia ourruooides 



Species common to Atlin and Telegraph Creek, probably finding 

 their southern limit near Telegraph Creek : 



1. Spizella monticola ochracea 



2. Junco hyemalis oouneetens 



3. Dendroica coronata hooveri 



Species common to Hazelton and Telegraph Creek, probably finding 

 their northern limit near Telegraph Creek: 



1. Dryobates villosus monticola 



2. Cypseloides miger borealia 



3. Chaetura vauxi 



4. Melospiza melodia rufina 



5. Piranga ludoviciana 



6. Vireosylva gilva swainsoni 



7. Oporornis tolmiei 



8. Setophaga ruticilla 



Species found at Atlin and not at Telegraph Creek, probably find- 

 ing their southern limit between these points : 



1. Surnia ulula caparoch 



2. Dendroica striata 



3. Penthestes hudsonicus hudsonicus 



Species found at Hazelton and not at Telegraph Creek, probably 

 finding their northern limit between these points : 



1. Cyanocitta stelleri annectens 



2. Junco oreganus shufeldti 



3. Stelgidopteryx serripennis 



4. Vireosylva olivacea 



5. Dendroica auduboui auduboni 



6. Dendroica magnolia 



7. Geothlypis trichas occidentaUs 



In this discussion of the life zones of the regions involved, so much 

 more information was forthcoming from the birds than from the mam- 

 mals that more stress is necessarily given to evidence derived from 

 them. A large percentage of the mammals of the interior are of species 

 of which it is difficult to obtain specimens, especially in summer. A 

 number of species we failed to meet with at all, though possibly they 



