I06 PROCEEDINGS MANCHESTER INSTITUTE 



years has not been heard after the eleventh day. A few birds 

 are located by call-note or are occasionally seen up to the middle 

 of August. In early August, however, the species has generally 

 dropped out of sight and hearing. ■' 



181. Hylocichla aliciae alicise. Gray - cheeked 



Thrush. 



A rare migrant. On October 3, 1908, two thrushes were 

 seen near the first camp on the South Branch, which by reason 

 of their size were identified as Gray-cheeked, and not Bicknell's, 

 Thrushes. They were well seen and compared with an Olive- 

 backed Thrush both in tone of color and in size. 



182. Hylocichla alicife bicknelli. Bicknell's Thrush. 



A not uncommon summer resident in the ravines of the 

 Presidential Range and along its streams above 2500 feet ; found 

 also on Mt. Starr King in the dwarf evergreens on the summit 

 and in its ravines. At the " Perch Camp " on Mt. Adams, at 

 an elevation of 4400 feet, beside the headwaters of the Cascade 

 Brook, several birds have been heard singing and calling, the 

 singing being mostly confined to the sunrise hour. In Jefferson 

 Notch, 3000 feet elevation, and for 500 feet below on either 

 declivity, birds have often been heard singing in June in the 

 forenoon hours. Also in Tuckerman's Ravine the song has 

 repeatedly been heard at noonday and in the early afternoon, 

 but the repetition of it has not been long continued. Two birds 

 were heard singing on Mt. Clinton on July 22, 1909, while eight 

 others called, in the middle of the day. The song period extends 

 to about the middle of July. By early August the birds are 

 mostly silent except in the very early morning and evening. In 

 the evenings of August 9 and 10, 1900, when at the "Perch 

 Camp," the nighthawklike calls were heard. I have but one 

 September record, namely, on the nineteenth da)^ in 1900, when 

 in the middle of the day the usual call- note was heaid in Tuck- 

 erman's Ravine, 



