Miscellaneous. 365 



the European bird the yellow runs up to the inner edge of the sym- 

 physis on the under side of the lower mandible, and almost as far on 

 the upper edge ; and on the upper mandible, also, it extends both on 

 the edges and on the ridge much higher than in the American bird. 

 The primaries are much darker in the American bird than in the 

 European, and the white line which runs along the inner edges and 

 forms their tips in the European bird, disappears in the American 

 before it gets within half an inch of the tip ; besides being much 

 narrower. There are also some important differences in form. The 

 projecting point at the symphysis on the under side of the lower 

 mandible is more marked in the American than in the European bird. 

 The claws of the European bird are larger and much more arched 

 than those of the American. The bill of the European bird is much 

 narrower in proportion than the American, and is more bent. 



The specimen of S. acuflavida in his collection was procured at 

 Tancah, on the coast of Yucatan, on the 25th of April, 1842, and is 

 mentioned in the appendix of Mr. Stephens's Incidents of Travel in 

 Yucatan, under the name of S. Boysii. 



Troglodytes albinucha, a new species of Wren. 



Millimetres. 



Total length 140 



Length of wing from flexure 58 



„ tail 51 



„ head and bill 38 



„ bill along the ridge 17 



„ bill along the gape 22 



Width of bill at feathers 3| 



Depth I „ 3£ 



Length of tarsus 20 



„ middle toe with the claw 22 



„ inner toe 15 



„ outer toe 16 



„ thumb 17 



The bill is bent from the base to the tip. The claws are much 

 curved and very sharp. The head, back, and upper sides of the 

 wings and tail, brown ; a line of white, with black or dark brown 

 intermixed, passes over the eye, and meets with a similar line, which 

 passes under it, and they form a patch on the sides of the neck ex- 

 tending round to the nape. Chin, throat and breast white ; flanks 

 and abdomen light yellowish brown, darkest near vent. On the 

 rump are some white and dark brown or black spots intermixed 

 with the brown of the rest of the back. Under tail- coverts, the 

 outermost, and outer webs of next three tail-feathers, and outer 

 edges of first and second primaries, barred with white or yellowish 

 white and dark brown or black. There are many black bars run- 

 ning across upper side of wings and upper tail-coverts. The four 

 middle tail-feathers are brown, with many black spots. The upper 

 mandible is dark horn- colour ; the under mandible is the same at its 

 tip, but is almost white on the under side and at base. The fourth 

 and fifth primaries are longest and the first is shortest. 



The specimen from which the description was taken was the only 

 one observed, and was procured near Yalahao, in Yucatan, April 6th, 

 1842.— Proc. Bost. Soc. Nat. Hist. Nov. 17, 1847, p. 257. 



