386 BULLETIN 50, TrNITED STATES NATIONAL MUSEUM. 



S. Nat. Mus., i, 1878, 120 (Fort Brown, Texas; descr. nest and eggs). — 

 Salvin and Godman, Biol. Centr. Am., Aves, i, 1879, 55 (Rio Grande Valley 

 to Vera Cruz). 



[Lopkophanes] airocristatus Sclater and Salvin, Nom. Av. Neotr., 1873, 5. 



Lophophanes atrocristatus CouES, Birds Col. Val., 1878, 116, footnote, part; Cheek 

 List, 2d ed., 1882, no. 42, part. — Sennett, Bull. U. S. Geol. and Geog. Surv. 

 Terr., iv, 1878, 6 (Brownsville and Hidalgo, Texas); v, 1879, 378 (Lomita, 

 Texas). — Ridgway, Nom. N. Am. Birds, 1881, no. 37, part. 



LlophophanesJ atrocristatus Coues, Key N. Am. Birds, 2d ed., 1884, 265, part. 



B/EOLOPHUS ATRICRISTATUS SENNETTI, new subspecies.a 

 SENNEIT'S TITMOUSE. 



Similar to JB. a. atricr (status, but decidedly larger; upper parts 

 much clearer gray, with little, if any, olive tinge; adult female with 

 crest feathers more often and more extensively tipped with gray, and 

 both sexes with forehead more often tinged with brown or rusty, 

 sometimes deeply so.* 



Adult male.— Length (skins), 137-148 (142.2); wing, 75-79.5 (77.1); 



«Type, no. 112939, coll. U. S. Nat. Mus., adult male, Leon Springs, Bexar 

 County, Texas, March 18, 1887; C. W. Beckham. 



T> Any pronounced rusty tinge to the color of the forehead indicates, in the writer's 

 opinion, admixture of B. bicolor blood. This reaches its extreme development in 

 individuals corresponding to Parus airicrisiatus caslaneifrons Sennett and P. bicolor 

 thsensis Sennett, the former comprising those with a black crown and crest and deep 

 rusty or chestnut forehead, the latter those with a gray crown and crest and rusty or 

 chestnut forehead. That these are all merely hybridj between B. atricristatus 

 sennetti and B. tricolor is almost certain from the fact that they occur together in the 

 same localities along with the two hypothetical parent species; furthermore, the 

 National Museum collection contains two pairs, shot at San Antonio, by Mr. H. P. 

 Attwater, the males of which are typical B. a. sennetti and the females B. b. texensis. 



The synonymy and characters of the two alleged forms are as follows: 



BseolophuB atricristatas castaneifrons (Sennett). \ 



Parus atricristatus castaneifrons Sennett, Auk, iv, Jan., 1887, 28 (Bee Co., Texas; 

 coll. G. B. Sennett).— Ridgway, Man. N. Am. Birds, 1887, 594.— Chapman, 

 Auk, V, 1888, 400.— Cooke, Bird Migr. Miss. Val., 1888, 277. 

 Plarus'\ atricristatus castaneifrons Ridgway, Man. N. Am. Birds, 1887, 561. 

 Similar to B. a. sennetti, but forehead deep rusty brown o. chestnut, and black of 

 crown and crest duller, sometimes intermixed with gray. 



Beeoloplms bicolor texeusis Sennett. 



Parus bicolor texensis Sennett, Auk, iv, Jan., 1887, 29 (Bee Co., Texas; coll. G. B. 

 Sennett).— Ridgway, Man. N. Am. Birds, 1887, 593.— Chapman, Auk, v. 

 1888,400; Bull. Am. Mus. N. H., ill, 1891, 327 (Corpus Christi).— Attwater, 

 Auk, ix, 1892, 342 (San Antonio, winter). — Cooke, Bird Migr. Miss. Val., 

 1888, 277. — American Ornithologists' Union, Check List, 2d ed., 1895, no. 

 731a.— Carroll, Auk, xvii, 1900, 348 (Refugio Co.). 



P[acM8] bicolor texensis Ridgway, Man. N. Am. Birds, 1887, 561. 



P[arus'\ {B[aeolophus]) bicolor texensis Hellmayr, Tierreich, 18 Lief., Mar., 

 1903, 42. 

 Similar to B, a, casldueifrons, but crown and crest wholly gray or but slightly 



