Todd-Carriker : Birds of Santa Marta Region, Colombia. 289 



Siptornis antisiensis Sclater, Cat. Birds Brit. Mus., XV, 1890, 59 (" Santa 

 Marta"). — Bangs, Proc. Biol. Soc. Washington, XIII, 1899, 99 (Santa 

 Cruz, Paramo de Macotama, and Paramo de Chiruqua). — Allen, Bull. 

 Am. Mus. Nat. Hist., XIII, 1900, 158 (Valparaiso). 



Siptornis hellmayri Bangs, Proc. Biol. Soc. Washington, XX, 1907, 55 (Par- 

 amo de Macotama; orig. descr. ; type now in Mus. Comp. Z06I.). — Bha- 

 BOUENE and Chubb, Birds S. Am., I, 1912, 233 (ref. orig. descr.;- range). 



Acrorchilus hellmayri Ridgway, Bull. U. S. Nat. Mus., No. 50, V, 191 1, 184, 

 footnote {sp. opt.). 



Cranioleuca hellmayri Cory, Proc. Biol. Soc. Washington, XXXII, 1919, 

 151, 156 (diag. ; range). 



Twelve specimens: San Lorenzo, Cincinnati, Sierra Nevada de 

 Santa Marta (6,000 feet), Las Vegas, and Cerro de Caracas. 



A specimen secured by Simons from some point in this region was 

 referred to the species now called Acrorchilus antisiensis both by Sal- 

 vin and Godman and by Sclater, and when additional specimens came 

 to hand as a result of the work of Messrs. Brown and Smith they were 

 referred to the same species- Mr. Hellmayr presently discovered that the 

 Santa Marta bird was really distinct from A. antisiensis, and upon his 

 calling the attention of Mr. Bangs to the matter the latter at once de- 

 scribed the new form, naming it after Mr. Hellmayr. It differs from 

 A. antisiensis at a glance in having the pileum distinctly streaked, not 

 plain, and in other details of coloration. As shown by the present 

 series, the species is subject to considerable variation as regards the 

 amount of rufous on the crown, dependent no doubt on sex and age. 

 One worn specimen has scarcely any of this color visible. 



Mr. Cory, the latest reviewer of this very difficult group, would re- 

 duce both Acrorchilus and Asthenes to synonyms of Cranioleuca. Tak- 

 ing into consideration the Santa Marta forms alone, we are scarcely 

 prepared to follow him in this, believing that while Acrorchilus may be 

 the same as Cranioleuca (the type of which we have not yet seen), it 

 is certainly distinct from Asthenes, not only in its much shorter tarsus, 

 but also in having a differently shaped wing, with the outer primary 

 conspicuously reduced, and the wing-tip relatively longer and more 

 pointed. We are inclined at least provisionally to regard these differ- 

 ences as generic in character. 



Although Mr. Brown claims to have taken this species on the Para- 

 mos de Macotama and Chiruqua, the writer has found it to be a Sub- 

 tropical Zone form, ranging from 5,000 up to 9,000 feet. It occurs 



