90 Proceedings of the Biological Society of Washington. 



the dark central markings, above and below, much narrower, especially on 

 the breast. 



Measurements. — Type, adult cp: wing, 167.5; tail, 90.5; tarsus, 30.5; 

 culmen from cere, 14.2. 

 Specimens examined. — 



O. c. luctisonus, ten: — Costa Rica, 2; Panama: Divala, 1; Pearl 



Islands, 7. 

 0. c. crucigerus, nine: — Surinam, 8; Cayenne (tradeskin), 1. 

 We have not seen specimens from the type locality of crucigerus, but 

 assume that the Surinam bird is sufficiently close for comparison. The 

 difference in coloration between the two forms is very decided. All the 

 specimens we have examined are in the brown phase. 



Mecocerculus leucophrys roraimae, subsp. nov. 



Type.—M. C. Z., 83,090 (coll. T. E. P., 2009), adult 9 ; British Guiana: 

 Mount Roraima, 24 August, 1883; Henry Whitely. 



Subspecific characters. — Similar to Mecocerculus leucophrys nigriceps 

 Chapman, and of about the same size, but upper parts much darker, more 

 olive-brownish, less olive-greenish ; similar also to Mecocerculus leucophrys 

 setophagoides (Bonaparte), but much smaller, and upper parts slightly 

 darker. 



Measurements. — Type, adult 9 : wing, 59.0; tail, 58.5; tarsus, 19.0; 

 exposed culmen, 9.0. 

 Specimens examined. — 



M. I. roraimae, one: — the type. 



M. I. nigriceps Chapm., thirty: — Venezuela: Las Palmales, 1 cf (the 



type); Paramo de Rosas, 4; State of Lara, 6; Merida, 3. Colombia: 



Santa Marta region, 16 (including the type of Myiopatis montensis 



Bangs). 



M. I. setophagoides (Bonap.), thirteen: — Colombia: Las Ventanas 



(Santander), 10; Bogota, tradeskin, 1; unspecified, 2. 

 M. I. leucophrys (Lafr. and d'Urb.), one: — Bolivia. 

 ? M. I. notatus Todd, two: — Colombia: Huila, Valle de las Pappas, 

 Central Andes, 1,000 ft., 1 cf , 1 9 • 

 Hartert and Goodson (Nov. Zool., XXIV, 1917, p. 494) have called 

 attention to two specimens from Roraima, which are as small as M. I. 

 nigriceps, but dark above as M. I. setophagoides. They state that the 

 Guiana specimens in the British Museum agree with those in Tring. Our 

 own specimen showing these same characters, we have not hesitated to 

 separate the Guiana form. 



We are indebted to Dr. Frank M. Chapman and Mr. W. E. Clyde Todd 

 for the loan of a good series of skins. 



Nuttallornis borealis majorinus, subsp. nov. 



Type.—M. C. Z., 55,371, adult cf; Pine Flats, north fork of San Gabriel 



River, Los Angeles County, California, 19 July, 1905; C. H. Richardson, Jr. 



Subspecific characters. — Similar to Nuttallornis borealis borealis of eastern 



