698 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
head, chin, and throat plain sooty black or very dark sooty; a con- 
spicuous white collar completely encircling neck, this broadest below, 
where usually encroaching slightly on median portion of lower throat, 
the feathers all sooty blackish or dark sooty basally; rest of plumage 
black, the back, scapulars, rump, and upper tail-coverts slightly 
glossed with bluish, the wings and tail more grayish black, paler 
(more grayish sooty) on inner webs of remiges and rectrices; bill and 
feet black; iris dark brown. 
Adult male.—Length (skins), 185-200 (188.3); wing, 188-205 
(196.5); tail, 62.5-72 (67.5); exposed culmen, 9-10 (9.5); tarsus, 
19-22 (20.9); middle toe, 13.5-15.5 (14.6).¢ 
Adult female—Length (skins), 180-194 (189); wing, 185.5-207 
(197.6); tail, 63-75 (69.4); exposed culmen, 9-10.5 (9.9); tarsus, 
19.5-22 (21.1); middle toe, 14.5-15.5 (14.9).° 
Costa Rica (Peralta; Tucurriqui; San Pedro; Volc4n de Irazti; La 
Palma de San José; Escazi; Boruca; Paso Real de Térraba) and 
southward through Panama (Chitra; Calovévora), Colombia (Bogota; 
Sierra Nevada de Santa Marta; La Concepcién, Santa Marta; Antio- 
quia; Ambalema; Bucaramanga) and Ecuadér (Guayaquil; Quijos; 
Chimbo; Chaupi; Paramo del Illiniza; Volc4n de Pichincha, 13,000- 
14,000 feet) to Peru (Lima; Cuzco; Cosnipata; Chyavetas; Chancha- 
mayo; Huallaga; La Mercéd; Santa Ana; Huaynapata), Trinidad, 
Grenada, and British Guiana (Roraima). 
Hemiproene albicincta CaBants, Journ. fiir Orn., 1862, 165, part (Guiana). 
Acanthylis collaris (not Hirundo collaris Maximilian) Cabanis, in Schomburgk’s 
Reise Brit. Guiana, iii, 1848, 709.—Litoravp, Ois. Trinidad, 1866, 83. 
Hemiprocne collaris Coapman, Bull. Am. Mus. N. H., vi, 1894, 58 (Trinid4d). 
@ Ten specimens. > Hight specimens. 
Ex- 
Locality. Wing. | Tail. | posed | Tarsus. wile 
culmen ig 
MALES. 
Six adult males from Costa Rica....................2222228 eee 195.9 68.1 9.7 {| 21.2 14.8 
One adult male from Panamé (Chiriquf)................2-.-.- 195 67.5 9.5 20.5 14.5 
Three adult males from Colombia.............--...22.-.2220-5 198.3 66.8 9.2 20.2 14.2 
FEMALES. 
Six adult females from Costa Rica................202--ceee eee 200. 5 70.9 9.7 21.2 14.9 
One adult female from Colombia.............-...22. 0. ee scene 192 66.5 10.5 22 15 
One adult female from Peru..........---- ++ 222-2002 e ee eee ee eee 185 63 10.5 10.5 14.5 
I have not seen specimens from the type locality of Hemiproene albicincta Cabanis 
(Guiana) or contiguous territory, and the form here characterized as Streptoprocne 
zonaris albicincta may possibly not be the same. In this case the name Streptoprocne 
zonaris minor would have to be used instead, the type locality of Hemiprocne minor 
Lawrence being central Colombia (Bogoté). 
