N0.1153. REVISION OF THE GENUS THBYOMANES—OBERHOLSER. 431 



surface, more prominent superciliary stripe, more heavily barred lower 

 tail-coverts, longer wing and culmeii, aud somewhat shorter tail. lu 

 the much duller browu of the upper surface, as well as the decidedly 

 greater length of wing and t-A\\, percnuH is so different from beiciclcii, 

 calophonns, or npilurns, that no detailed com^jarisou is necessary. 



An April specimen of percnus from Zapotlan, Jalisco, Mexico, is 

 noticeably paler and less rufescent than the type, thus somewhat 

 approaching bairdi. A female from Tonila, Jalisco, is rather peculiar, 

 being very much smaller, and, in the color of the upper parts, decidedly 

 more richly reddish brown than any of the other specimens of percnus. 

 An adult male, collected by Sumichrast in August, 1808, at Puente 

 Colorado, Guerrero, Mexico, is in fresh plumage, and seems to be per- 

 fectly typical of the present race. The young of T. h. percnm are 

 apparently not with certainty to be distinguished from the young of 

 hairdi. 



Thirteen specimens examined, from the following localities, breeding 

 records being indicated by an asterisk, 



Jalisco: Etzatlan;* Tonila; Zapotlan;* Guadalajara.* 



Zacatecas: I'lateado.* 



Guerrero: Puente Colorado. 



THRYOMANES BEWICKII MURINUS (Hartlaub). 



ThryothoruH murimis HAKTLAru, Kev. et Maj^. dc Zool, 1852, 2(1 ser., IV, p, 4. 

 Thrifothorus beivickii murinus Kidgway, Auk, 1887, IV, p. 350. 



Chars, subsp. — Thryomanes T. b. percno affinis, sed supra saturate 

 canobrunneus uec obscure rufo-brunueus. 



Meihsurements {10 specvnem). — Wing, 57 to 61.5 (average, 58, 8) mm.; 

 tail, 50 to 00.5 (average, 58.1) mm.; exposed culmen, 14 to 10 (average, 

 14,8) mm,; bill from nostril, 9.5 to 12 (average, 10.7) mm.; tarsus, 18.5 

 to 20,5 (average, 10,4) mm,; middle toe with claw, 15.5 to 18 (average, 

 10.7) mm. 



Type locality. — Rio Frio, Mexico, Mexico. 



Geographic difitribution. — Mexican States of Hidalgo, Mexico, Tlax- 

 cala, and northern Morelos. 



Description.— M'dle, adult; No. 142970, U.S.N.M., Biological Survey 

 collection: Amecameca, Mexico, Mexico, February 1,1893; E.W, Nelson. 

 Above warm grayish sepia, darker on the crown, the feathers of the 

 rump with more or less concealed white spots; upper tail-coverts hair 

 brown, obsoletely barred with blackish. Wing quills fuscous, the sec- 

 ondaries margined externally with sepia, and barred with darker 

 brown, most of the primaries indented on basal portion of outer webs 

 with pale brown ; wingcoverts like the back, the greater series faintly 

 barred with darker, and edged with lighter brown. Tail black, the 

 central feathers with broad and regular bars of hair brown, the two 

 succeeding pairs tipped, and on basal portion margined on outer webs 

 with hair browu in the shape of broad transverse markings, like those 



