132 University of California Publications in Zoology [Vol. 30 



Breeding juncos from Careross show a distinct approach to the 

 subspecies hyemwMs, as compared with connectens from the Stikine 

 region, so much so that Careross may be regarded as near the northern 

 limit of the r£tnge of connectens. 



At Careross, May 22, male juncos were singing from the tops of 

 bushes and small trees. Females collected during the next few days 

 had their sets partly laid. Two nests, each with four fresh eggs, were 

 found near Atlin, May 31. These and other nests subsequently found 

 were all very much alike. They were all in fairly open bottom land, 

 on the ground, and well concealed in sheltering grass and other vegeta- 

 tion. Juncos bred most abundantly in the lowlands, but on June 30 

 I found a nest with five fresh eggs on a mountain side at about 3500 

 feet altitude. The situation was a warm, south-facing slope ; the nest 

 was buried in a dense clump of bear-berry and grass. 



On June 26 the first young out of the nest was seen, and from then 

 on through August spotted young were fairly common in small flocks 

 throughout the lowlands. During September juncos were migrating 

 through the region. The last were noted September 19, but from the 

 number seen that day I am sure that some must linger to a much 

 later date. 



Melospiza lincolnii lincolnii (Audubon) . Lincoln Sparrow 

 Breeding in fair abundance in the disconnected marshy areas that 

 occur throughout the lowlands. On June 14 a nest was found with 

 five eggs at the point of hatching. The first young was seen flying 

 on July 2. The species was last noted on August 29. Two specimens 

 (nos. 44892^4893) collected,by myself, and others taken by Brooks, 

 are all typical of the subspecies lincolnii. 



Petrochelidon lunifrons lunifrons (Say). Cliff Swallow 

 Nests were seen on buildings at Careross. The first cliff swallow 

 was noted there on the evening of May 26, some days after our own 

 arrival, and when we reached Atlin, May 28, the species was present in 

 force. It nests in some numbers in the town, but we found it breeding 

 nowhere else. The last cliff swallow was noted August 16. 



Hirundo erjrthrogaster Boddaert. Barn Swallow 

 This species arrived at Careross on the morning of May 26. Old 

 nests were seen on several houses there. It was abundant in the town 

 of Atlin, but was not found nesting elsewhere. Last noted September 1. 



