Vol. XXII 

 1905 



Bishop, H. leucobronchialis and II. laivrencei. 22 



ning of the breeding season ; while both species are reported very 

 rare, if they ever occur, at East Hartford — a few miles north of 

 Portland. Specimens of H. lawrencei have been taken at Stam- 

 ford, Bridgeport, New Haven, Seymour, and Portland — places 

 where both species occur, but one or the other is extremely rare. 

 Practically all the Golden-winged Warblers collected near New 

 Haven have been found in a narrow strip of country radiating 

 from the northwestern part of the city, and here also about all 

 the Lawrence's have been taken. A male Golden-winged was 

 taken there by myself May 12, 1894, and on May 15 and 20, 

 1896, two male Lawrence's were collected within half a mile of 

 this bird by Mr. A. H. Verrill and myself ; and from this same 

 stretch of territory Mr. Verrill brought me on May 23, 1898, a 

 laying female of the Golden-winged and with her a male Blue- 

 winged which he stated was nesting with this bird. The Blue- 

 winged is abundant in this region, thus establishing an ideal con- 

 dition for the production of hybrids. 



The song of Lawrence's Warbler may resemble that of either 

 of the above species, but has no characteristic of its own. These 

 birds associate freely with both species, and have been found 

 mated with the Blue-winged, but never with each other. 



Typical specimens of H. la%vre?icei have, as is well known, no 

 character of plumage peculiar to themselves, but only a combina- 

 tion of characters found in H. chrysoptera&nd H. pinus ; yet the 

 majority of specimens recorded closely resemble the type, and 

 to prove it a hybrid under these circumstances intermediates 

 between it and the above species should be forthcoming. Such 

 specimens it gives me pleasure to show you to-day. The type, 

 you will remember, may be considered either a Golden-winged 

 with the yellow chin, breast, abdomen, postocular and malar 

 stripe and bright olive-green back of the Blue-winged, or the latter 

 with the black auriculars and throat of the former ; the wing-bars 

 being either yellow or white. In the majority of specimens I have 

 seen the black of the throat extends over the chin, and this form 

 is, I believe, the true hybrid between the two species, if it is a 

 hybrid, as I trust these specimens will convince you. Birds like 

 the type of H. lawrencei, with yellow chin, seem to be rarer, 

 and are, I believe, the result of crossing the black-chinned birds 



