32 The Ornithology of Chester County 



men found dead in a field, was presented to Dr. 

 Warren; and this, with a later capture, remain in 

 his collection. 



14. Hydrochelidon nigra surinamensis Black 

 Tern. Straggler. Two specimens, male and fe- 

 male, were taken by Titus Bennett, of West Ches- 

 ter, in the fall previous to 1879; and this pair, with 

 another collected in the spring; are in the collec- 

 tion of Dr. Warren. Another was killed in the 

 fall two or three years ago (Warren MS.). 



15. Puffinus gravis Greater Shearwater. Strag- 

 gler. This powerful bird, despite its strength and 

 endurance of wing, was storm-stranded within our 

 borders and perished during a severe storm of wind, 

 rain and sleet (Michener, Hist. Chester Co., Pa., 

 1 881, 445). Sole State record. 



16. O ceanadroma leucorhoa Leach's Petrel. Strag- 

 gler. A specimen was presented to Dr. Warren in 

 September, 1879, by the late Dr. George Martin of 

 West Chester, who had found it in his yard in an 

 exhausted and dying condition (Bds. Pa., 1890, 27). 

 Sole State record. 



17. Mergus americanus Merganser, "fish duck," 

 "sawbill." Rare winter visitant and occurs oc- 

 casionally as a transient. Listed by Barnard, War- 

 ren, Michener and Pennock. A flock of seven 

 attempted to winter, 1910-1911, at the Valley Forge 

 dam; but were reduced to three by Jan. 12, and 

 a dead and water soaked female was found Jan. 15 

 (No. 982, coll. F. L. B.). It is also recorded by 

 Mrs. H. P. Brinton, West Chester, Mar. 18, 1914 

 (Cass., xviii, 51). 



