° '1918 . Harlow, Breeding Birds of Penna. and N. J. 145 



told by an old collector that they had bred on his farm for several years and 

 that he had found their nests. I have not found them nesting anywhere 

 in Pennsylvania or New Jersey. 



148. Dumetella carolinensis. Catbird. — An abundant summer 

 resident throughout both states, but less numerous in the mountainous 

 counties of Pennsylvania. Data on 110 nests give average set, 4 (3-5); 

 average date, June 1 (May 22-July 10) . 



149. Toxostoma rufum. Brown Thrasher. — Common in the 

 lower parts of both states but less abundant or rare in the mountainous 

 sections. Data on thirty-two nests give: average set, 4 (3-5); average 

 date, May 12 (May 4- June 21). 



150. Thryothorus ludovicianus ludovicianus. Carolina Wren. — 

 Breeds commonly from Burlington and Camden Counties south to Cape 

 May, New Jersey, and less frequently up the Delaware River to French- 

 town. In Pennsylvania I have found it as a summer resident in the fol- 

 lowing counties: Chester, Delaware, Philadelphia, Montgomery, Bucks, 

 Lancaster, York, Dauphin, Cumberland, Perry (rare), Greene and Wash- 

 ington. Data on thirteen nests give: average set, 5 (4-6); average date, 

 April 15 (April 5-June 18). 



151. Thryomanes bewicki bewicki. Bewick's Wren. — Breeds 

 fairly commonly in Greene County, Pennsylvania, where I have found 

 several nests. It is also a regular though rare breeding bird in Center 

 County, where at least one pair nests every year. In Huntington County 

 it nests rarely. Two sets of eggs in my collection from Waynesburg, Greene 

 County, were taken on May 6, 1911 (6 eggs), and May 10, 1914 (7 eggs). 



152. Troglodytes aedon aedon. House Wren. — Common summer 

 resident in southern New Jersey and in Pennsylvania east of the Alle- 

 ghanies. West of the mountains it seems to be more local and in Greene 

 County is largely replaced by the previous species. Data on forty-seven 

 nests give: average set, 6 or 7 (5-8); average date, May 28 (May 22- 

 July 29). 



153. Nannus hiemalis hiemalis. Winter Wren. — I have found 

 this species summering in the following counties: Warren, Clinton, Sulli- 

 van, Pike, Monroe and Wayne, but have found more of the sham nests 

 than the occupied ones. Data on three nests give: average set, 4 or 5; 

 average date, May 20. 



154. Cistothorus stellaris. Short-billed Marsh Wren. — One of 

 my most interesting New Jersey records is of a colony of these birds 

 nesting on the salt marsh in lower Burlington County. They inhabited 

 the thick marsh grass, not the cattails or higher growth, and nest in the 

 grass close to the ground. Two sets of eggs in my collection were taken 

 August 4, 1913, and consist of four and five eggs respectively. Another 

 nest found on the same day contained five young birds. These were evi- 

 dently a second nesting. In Pennsylvania I have noted the Short-billed 

 Marsh Wren in Center County as late as May 30 but have no evidence of 

 its nesting. 



