Holmes, R. 1959 4. Calcorius laponicus 9 June Barrow, Alaska and others not. The condition of the gonads of 7 birds collected showed no difference when compared to those (several days) ago (all around 2 mm in diameter). 10 June Barrow, Alaska The 99 seemed more abundant than previously, and the males were seen frequently going through their aerial song-display. The fight-chase between 2 males was only seen once. 11 June Barrow, Alaska. The birds seem to be paired now with very few individuals seen. They are often seen in their chases over the snow where the 8 may be chasing the & or 2 & will be chasing each other. During the "" chase, there may be actual contact between the two birds. One & which was collected had an egg which was just about ready to descend, so i, laying would have been within a day or two. 13 June Barrow, Alaska One & collected which had laid one egg and had a second in the oviduct. The birds appear to be very secretive and are very