40 ARKIV FÖR ZOOLOGI. BAND 13. N:0 4. 



Bångs this is an error. The specimens mentioned were namely 

 collected at San Miguel in the Sierra Nevada de Santa Marta 

 and not in the Pearl Islands. 



*63. Tyrannus tyrannus (Linné). 



Tyrannus tyrannus Bångs, Auk. XVIII. 1901. 30 (San Miguel, April 27) 

 — RiDGWAY, Birds North Middle Am. IV. 1907. 689 (San Miguel; Saboga. 



Tyrannus tyrannus tyrannus Thayer and Bångs, Bull. Mus. Comp. Zoöl. 

 XLVI. 1905. 153 (San Miguel; Saboga; March 18 to April 8). 



BovALLius' Collection: 1 $, Chapera, April 2; 1 c^, Viveros, 

 April 8; 1 ?, Trapiche, April 21. 



Win ter range: Southern Mexico to Colombia, Brit- 

 ish Guiana, Peru, and Bolivia. Jewel (1. c. p. 427) found 

 it a rare winter visitor in Panama. 



64. Tyrannus melancholicus satrapa (Cabanis and Heine). 



Tyrannus melancholicus satrapa Bångs, Auk. XVIII. 1901. 30 (San Miguel) 

 — Thayer and Bångs, Bull. Mus. Comp. Zoöl. XLVI. 1905. 154 (San 

 Miguel: Saboga; Pacheca) — Ridgway, Birds North Middle Am. IV. 

 1907. 700 (San Miguel). 



BovALLius' Collection: 1 ^, Saboga, March 30. 



Fam. Formicariidae. 

 65. Thamnophilus radiatus nigricristatus (Lawrence). 



Thamnophilusdoliatusnigricristatus B A-ifGs, Auk. XVIII. 1901. 30 (San Miguel). 

 Thamnophilus nigricristatus Thåyeu andBANGSf^Bull. Mus. Comp. Zoöl. XLVI. 



1905. 150 (San Miguel). 

 Thamnophilus radiatus nigricristatus Ridgway, Birds North Middle Am. 



V. 1911. 37 (San Miguel). 



BovALLius' Collection: 2 SS, Viveros, April 5 and 10. 



Mr. Ridgway remarks (p. 39, foot-note) that the birds of 

 San Miguel are possibly separable, perhaps referable to T. r, 

 dlbicmis, on account of their larger size. On page 38 (foot- 

 note) he, however, says, that the series which he examined 

 from the mainland of Panama comprised three adult males 

 like the type and ten, which were indistinguishable from 

 Colombian examples labelled Thamnophilus albicans. To 

 this he adds, that the individual variation is in Th. radiatus 

 much greater than in Th. doliatus, which is reasonably constant 



