THET0TH0EU8. 95 



Thryothorus alUmcha, Baird, Eev. Am. B. i. p. 149"; Salv. Ibis, 1866, p. 191'; Lawr. Ann. Lye. 



N. Y. ix. p. 199'. 

 Thryothorus petenicus, Salv. P. Z. S. 1863, p. 187 '; Baird, Rev. Am. B. i. p. 125 \ 



Supra brunneus, uropygio paulo rufescentiore et maculis celatis albis notato ; alis vix nigro transfasciatis, loris 

 et superciliis albis, regione postoculari brunnea ; capitis et colli lateribus' albis nigro vix vittatis ; eauda 

 nigra, rectricibus duabus extimis albo irregulariter punctatis, duabus mediis fusco-brunneis, his et reliquis 

 nigro fasciatis ; subtus albus, hypochondriis brunneo lavatis, crisso nigro distincte transfasciato ; rostri 

 maxilla cornea, mandibulse basi albicante ; pedibus pallide corylinis. Long, tota 5-1, alae 2-3, caudae 2-0, 

 rostri a riotu 0-9, tarsi 0-85. (Descr. exempl. ex Sakluk, Peten. Mus. nostr.) 



Hah. Mexico, Yalaliao i and Merida^, Yucatan {Cabot\ Schott^) ; Guatemala, Sakluk, 

 near Peten (0. S.^^). 



This species is one of very restricted range, being confined to the promontory of 

 Yucatan and the adjoining district of Peten. Dr. S. Cabot first discovered it during 

 his travels in Northern Yucatan, where it has since been obtained near Merida by 

 Dr. Schott. When at Sakluk near Peten, April 1862, Salvin shot a single specimen of 

 this Wren on the outskirts of a thicket in the open savannas in which the village is 

 situated. This bird was afterwards described as T. petenicus, but found to be in- 

 separable from Dr. Cabot's bird when compared with it by Prof. Baird ^. 



We have figured the type of T. petenicus. 



d. Bostrum dehile. 

 9. Thryothorus bairdi. 



Thryothorus bewicki, var. leucogaster, Baird, Eev. Am. B. i. p. 127 ' (nee T. leucogaster, Gould) ; 



Baird, Brew. & Ridgw. N. Am. B. i. p. 147'; Lawr. Mem. Bost. Soc. N. H. ii. p. 268'; 



Bull. U.S. Nat. Mus. no. 4, p. 14 *. 

 Thryomanes bewicki leucogaster, Coues, B. Col. Vail. i. p. 169 ". 

 Thryomanes bewicki, var. leucogaster, Merrill, Pr. U.S. Nat. Mus. i. p. 121 °. 

 Thryothorus bewicki, Sol. P. Z. S. 1859, p. 372"; Duges, La Nat. i. p. 139'; Sennett, BuU. U.S. 



Geol. Surv. iv. p. 9 '. 



Murino-brunneus, Cauda nigro indistincte irrorata, rectricibus extemis extus albo variegatis ; loris et super- 

 ciliis distinctis albis, stria postoculari murina ; capitis lateribus et corpore subtus sordide albis, crisso 

 indistincte fusco transvittato ; rostro et pedibus fuscis, mandibulae basi pallidiore. Long, tota 4-7, alse 

 2-1, caudse 2-0, rostri a rictu 0-75, tarsi 0-6. (Descr. exempl. ex Oaxaca, Mexico. Mus. nostr.) 



Hab. NoKTH Amebica, Colorado ^ and Rio-Grande valleys ^ 9. -:-Mexico, Tamaulipas 

 and Nuevo Leon (Couch ^), Guadalaxara (Grayson^), Guanajuato (Duges % valley 

 of Mexico (le Strange), Oaxaca (Boucard''), Puente Colorado (Sumichmst% 



This Wren is a race of T. bewicki, found in Mexico and the border lands of the Rio- 

 Grande and Colorado valleys, having two near allies in the northern continent— one, 

 T. bewicki, belonging to the south-eastern States and as far west as Texas, and the 



