20 Harlow, Breeding Birds of Penna. and N. J. [Jan. 



and have found three nests: 1. Atlantic County, N. J.; June 15, 1915; 

 three eggs. 2. Atlantic County, N. J.; June 15, 1915; four eggs. 3. 

 Atlantic County, N. J.; June 17, 1916; three eggs. 



[Mergus americanus. Merganser. — 



[Lophodytes cucullatus. Hooded Merganser. — 



[Nettion carolinense. Green-winged Teal. — 



[Marila affinis. Lesser Scaup. — These four ducks were mentioned 

 in Stone's work as possible breeders in Pennsylvania, but careful search 

 has failed to discover any evidence of the fact and I feel confident that 

 they cannot now be classed as summer residents.] 



7. Anas platyrhynchos. Mallard. — I have been unable to find 

 the Mallard nesting near Williamsport or on the Loyalsock Creek where 

 it had been formerly supposed to breed. It is however, a rare summer 

 resident in Erie County and I have found a single nest on the New Jersey 

 coast, in Burlington County, June 16, 1915, containing ten hatching eggs. 

 Female and young seen several times later close at hand. 



8. Anas rubripes. Black Duck. — Rare but regular breeder along 

 the coast of New Jersey from Ocean to Cape May Counties. In Penn- 

 sylvania, Mr. R. F. Miller and the writer saw a pair at Tinicum, Delaware 

 County, June 18, 1913, which from their actions appeared to be breeding. 

 I have also summer records from Erie and Fayette Counties. I have data 

 from two nests: 1. Ocean Co., N. J.; July 3, 1914; eight eggs. 2. Ocean 

 Co., N. J.; May 20, 1916; nine eggs. 



9. Aix sponsa. Wood Duck. — Still breeds in both states although 

 it has been almost exterminated. I have foimd them under circumstances 

 which point to their breeding in Burlington, Cape May, and Cumberland 

 Counties, N. J., and in Lancaster, Bedford and Pike Counties, Pa. 



10. Botaurus lentiginosus. Bittern. — In New Jersey, contrary 

 to the published statements I have found the Bittern breeding regularly 

 and fairly commonly on the salt marshes from Ocean to Cape May Counties 

 as well as on the Delaware Bay shore. In Pennsylvania I have but two 

 records; two young at Lamont, Center Co., June 17, 1909, and a pair 

 present at Charter Oak, April- July, 1917, Huntington Co. It is appar- 

 ently a very rare breeder in this state. Data on twelve nests give: average 

 number of eggs in a set, 4 (3-5); average date, May 25 (latest July 18). 



11. Ixobrychus exilis. Least Bittern. — A rare breeder in suitable 

 salt marshes along the New Jersey coast, becoming more common in the 

 fresh water swamps toward the Delaware River and very common on the 

 Hackensack meadows. In Pennsylvania it is very common in the Dela- 

 ware marshes as far north as Bucks County. I have not found it breeding 

 inland. Data recorded on forty-two nests give: average set 5 (3-6); 

 average date, May 30 (May 22-July 12). 



12. Ardea herodias herodias. Great Blue Heron. — Still found in 

 rapidly decreasing numbers in both states but only in the more remote 

 places, as heronries in the settled districts are always broken up. They 

 breed regularly but not commonly in the mountainous districts of 



