40 BTJLLETIIsr 50, UNITED STATES NATIONAL MUSEUM. 



THAMNOPHILUS DOLIATUS MEXICANUS Allen. 



MEXICAN ANtSHRIKE. 



Similar in coloration to T. d. doliatus,"- but wing averaging much 

 shorter and tail relatively longer. 



Adult male. — Above black, the forehead spotted or streaked, more 

 or less, with white, the elongated feathers of crown white (mostly 

 concealed) with a large apical guttate spot of black, the remaining 

 upper parts barred with white (the white bars always much less than 

 half as wide as the black interspaces), the white bars on rectrices and 

 tertials not reaching to shaft (except termmal bar on tertials); sides 

 of head, chin, and throat streaked with black and white, the first 

 with the two colors about equal in amount, the chm and throat with 

 the white usually predominating; rest of underparts broadly and 

 sharply barred with black and white, the bars of the two colors of 

 nearly equal width, except (sometimes) on center of abdomen, where 

 the black bars are narrower; maxilla brownish black, pale grayish 

 blue along tomium; mandible pale grayish blue; iris yellow; legs and 

 feet grayish dusky (grayish blue m life); length (skins), 138-167 

 (156.5); wing, 68.5-78.5 (72.6); tail, 57.5-69 (62.8); culmen, 18.5-20.5 

 (19.6); tarsus, 25-28 (26.6); middle toe, 14.5-17 (15.5).^ 



Immature male. — Similar to the adult male but plumage more or 

 less strongly suffused with pale ochraceous. 



Adult female. — PUeum bright chestnut or rufous-chestnut, paler 

 on forehead; supra-auricular region, hindneck and sides of neck 

 light ochraceous or buffy (sometimes buffy wliitish on sides of neck), 

 broadly streaked with black; rest of upper parts plain cinnamon- 

 rufous or tawny-chestnut, usually paler and tinged, more or less, 

 with olive-ochraceous on rump and upper back; a narrow orbital 

 ring of buff or buffy white; loral, suborbital auricular, and malar 

 regions buff or buffy whitish, more or less streaked or flecked with 

 black (most heavily on auricular region); chin and throat pale buff 

 to ochraceous-buff, often more or less streaked (mostly laterally or 

 posteriorly) with black or dusky; rest of underparts ochraceous 

 or ochraceous-buff, deepest on chest and sides, paler on abdomen, 

 where sometimes pale buff; usually the underparts are quite im- 

 maculate, but rarely there are indications of dusky bars on breast 

 and tibia, and often more or less distinct blackish or dusky spots or 

 streaks on upper chest; under wing-coverts clear buff or ochraceous- 

 buff, the mner webs of remiges broadly edged with pinldsh vinaceous- 

 buff or vinaceous-cimiamon ; maxilla dark brown or blacldsh brown, 

 whitish (in dried skuis) along tomium; mandible pale horn color or 

 dull whitish m dried skins (light bluish gray in life); iris white or 



o True T. doliatus is confined to Cayenne, Surinam, and British Guiana (see p. 36). 

 ^ Twenty-nine specimens. 



