31. TUlti'OTHORUS. 227 



about twent}- bars of black on the centre feathers, these bars not 

 always complete ; remainder of the tail-feathers bhick, tipped with 

 grey (with dusky bars on these grey euds), and near the base washed 

 externally with ashy grey and barred with black ; the outermost 

 feather notched with white distinctly on the outer web, and having 

 a broader ashy-grey tip ; a very distinct eyebrow from the base of 

 the nostril and the sides of the nape ; lores dusky ; eyelid white ; 

 car-coverts dusky brown, streaked with white ; cheeks and under 

 surface of body white ; sides of neck ashy grey ; sides of breast and 

 flanks light ashy, as also the thighs ; under tail-coverts white, barred 

 across with black, on M'luch is a slight tinge of reddish occasionally ; 

 under wing-coverts white, with dusky bases to the feathers near the 

 outer edge ; quills light brown below, ashy along the edge of the 

 inner web. Total length 5-5 inches, culmcu 0-7, wing 2-2o, tail 2-3, 

 tarsus 0'75. 



Baird's Wren may be considered a distinct race of T. hewlcl-U, 

 which it replaces in Mexico and in the valleys of the llio Grande 

 and Colorado. 



a. $ ad. sk. Puebla, Mexico. M. A. Boucard [C.]. 



*• Ad. sk. Mexico. M. A. Boucard [C.J. 



10. Tliryothorus brevicauda. 



Thryomanes brevicauda, Ridyiv. Bull. U.S. Geol. ^- Geogr. Stirv. ii. 

 p. 186. 



Adult. Above greyish hair-brown, brownest on the rump, greyest 

 on the tail ; remiges just perceptibly, and tail-feathers light duU 

 grey terminally, with one or two broad dusky bars across the an- 

 terior portion of the grej'. A very conspicuous white superciliary 

 stripe from the nostril to the occiput ; below this a greyish-brown 

 stripe, covering the lores and widening on the upper posterior portion 

 of the auriculars. Lower parts white anteriorly, passing gradually 

 into dull ash-grey on the sides and abdomen ; crissum broadly 

 barred with black. Wing l-So-l'DO inch, tail 1-80, bill 0-45-0-50, 

 tarsus 0-70-0-75, middle toe 0-50. {Eidgway.) 



Mr. Eidgway writes : — "This Wren appears to bear about the same 

 relation to T. heuncki leucogaster* that Junco imidaris does to 

 J. aiinedens ; and it is a curious fact that the analogue of each 

 should be the form from the interior of the continent instead of that 

 from the neighbouring coast. This insular form is much greyer 

 than the T. bnvicl-i spihirvs of California and Western Mexico, and 

 presents other decided differences from all the continental forms." 

 Mr. Eidgway then gives some measurements of specimens of the 

 two forms, showing how greatly they differ in dimensions and pro- 

 portions, the difference from T. hewklci lencogaster being still more 

 conspicuous. 



The Guadeloupe House-Wren is only known from Guadeloupe 

 Island, off the southern coast of California. 



* Thryothorus bairdi of this work. 



