Howell, T.R. 1950 S. varlus ssp. 16 mi. S. of Quesnel, ft., British Columbia July 8 (cont'd.) The young of this pair of ruber were cheeping loudly but not putting their heads out or screaming, and I think they would stay in the nest a minimum of two more days. Thus the ruber pairs are not necessarily ahead of the nuchalis, but may even be a bit behind. Those birds with young several days out of the nest are starting to show pinfeathers on their brood patches. In this area, then, are found unmixed pairs of typical ruber and typical nuchalis, and a few intermediates that are fully fertile. Interbreeding thus seems very limited, for one would expect a mixed population of mostly intermediates. The pair of ruber with young still in the nest shows that they, the residents, do not necessarily nest earlier than the migrant nuchalis. Mixed matings seem to occur chiefly when one ssp. has wandered a bit beyond its normal range, as the ruber at Alexandria and McLeese Lake. It is perhaps significant that in the mixed pairs and also the intermediates, the male is either ruber or closer to it than the female; this suggests that redness may be selected for by the females, or lack of it by the males. I have not found any pairs of male nuchalis and female ruber. Alexandria, 1800 ft., 28 mi. S. of Quesnel, B.C. July 9 - At the nuchalis nest in the woodlot below the ranch house, there was still at least one young one in the nest, although it was perfectly quiet