1924] Swarth: Birds and Mammals of the Skeena River Region 371

pallasi has been reported as breeding at Lae La Hache, British Columbia (Rhoads, 1898, p. 58), and as migrating at Quesnelle (Brooks, 1903, p. 284).

Planesticus migratorius migratorius (Linnaeus). Eastern Robin

Found everywhere in the lowlands; absent from the dense woods of the middle altitudes on the mountains, but reappearing in the open country above timber. When we reached Hazelton, May 26, robins were already sitting on eggs. The first young out of the nest appeared on June 16; by July 1 spotted young were about in numbers. During the second and third weeks in August there was a notable scarcity of robins; by September 1 .an influx of migrants had set in, and soon they were as numerous as ever. During the third week in September the southward exodus was in full swing. Day after day migrating flocks of robins trailed overhead, in loosely assembled companies and

flying at a great height. There were a good many still around though,

up to the time of my departure, September 26.

FKighteen specimens collected (nos. 42610-42627): six breeding adults (four males and two females), seven birds in the spotted juvenal plumage or in the post-juvenal molt, two adult males in fresh winter plumage, and one male and two females in first winter plumage.

I have ascribed this series to the subspecies migratorius, the form to which on the whole it bears closest resemblance, but there is con- siderable individual variation, with obvious intergradation toward the coastal subspecies caurinus. It might be that further collecting would show such intergradation to be mostly in breeding birds from this region, while September migrants, presumably from more northern points, are closer to typical mzgratorius. However, spotted young from the Hazelton region are more nearly like young migratorius than like caurinus at the same stage.

Ixoreus naevius naevius (Gmelin). Varied Thrush

Txoreus naevius meruloides (Swainson). Northern Varied Thrush

One family of varied thrushes was found in a lowland locality, in Kispiox Valley. They were in a grove of huge cottonwood trees border- ing the Kispiox River, a dark, gloomy place, grown up underneath the trees with an impenetrable tangle of devil’s-club, thimble-berry, and alder, in appearance just such a jungle as this thrush frequents on the coast. Here, on June 22, a brood of young, out of the nest, were being attended by their parents. The old male was collected (no. 42628).