10 Mr. G. N. Lawrence on new species of Birds 



111. Aythya VALLiSNERiA. No. 100 d. Forks of Saskat- 

 chewan, May 15th, 1858. 



112. BucEPHALA AMERICANA. No. 67 6. Forks of Saskat- 

 chewan, April 12th, 1858. 



113. BucEPHALA ALBEOLA. No. 96. Forks of Saskatchewan^ 

 April 1858. 



114. Mergus americanus. No. 14 6. Forks of Saskat- 

 chewan, Oct. 20th, 1857. 



No. 69 S . Forks of Saskatchewan, April 14th, 1858. 



115. Larus argentatus. No. 6 ^. Hudson's Bay, Aug. 

 13th, 1857. 



116. Larus delawarensis. No. 12. Saskatchewan River, 

 Sept. 28th, 1857. 



117. Chroicocephalus franklinii. No. 107. Saskat- 

 chewan Plains, May 16th, 1858. 



118. Chroicocephalus Philadelphia. No. 2 S- Hud- 

 son's Bay, Aug. 12th, 1857. 



119. Hydrochelidon plumbea. No. 135 $. Forks of 

 Saskatchewan, June 2nd, 1858. 



120. PoDicEPs coRNUTUS. No. 88 $ . Plains of Sask.-^.t- 

 chewan. May 3rd, 1858. 



IIL — Descriptions of Six New Species of Birds from the Isthmus 

 of Panama. By Geo. N. Lawrence, C.M.Z.S., &c. 



Fam. TURDID^. 



1. Heleodytes albo-brunneus, sp. nov. 



Male. — Head, neck, entire under plumage and under wing- 

 coverts white; back, wings, and tail of a glossy umber-brown, 

 tail rather lighter and narrowly crossed with darker nearly ob- 

 solete bars, the shafts of the central feathers whitish ; thighs 

 intermixed with light brown ; under tail-coverts pale ochreous 

 white with dusky stripes; upper mandible brownish horn- 



