.--In our recent studies of Colombian birds, working independently, we have found that the Double-striped Thick-knee (Burhinus striatus) of northern Colombia differs so definitely from the race B. s. vocifer of Venezuela and the llanos east of the eastern Andes as to require separation by name. It is described as follows: Burhinus striatus pediaeus, new subspecies Characters.--Similar to Burhinus striatus voci/er (L'Herminier)  but paler in gen- eral coloration; pale border stripes on feathers of dorsal surface definitely light-colored, ranging from pale cinnamon-buff to pale buff; dark areas of center of crown more brownish black; light borders of feathers on foreneck and upper breast decidedly paler; under tail coverts lighter, pale cinnamon-buff. Type.---U. S. National Museum no. 368601, male, taken near Maicao, Guajira, 15 April 1941, by A. Wetmore and M. A. Carriker, Jr. (original number 11429). Description o! type.--General color of central area of feathers on crown, back, and rump fuscous to fuscous-black, edged rather widely with dull white on the forehead and loral area, dull buffy white on the crown, and dull pinkish buff elsewhere; a broad black stripe on either side of the crown from the level of the front of the eye back to the nape; hindneck and side of neck dull buff, lined narrowly with fuscous; edge of wing prominently white; anterior lesser wing coverts fuscous-black, rest of lesser coverts and middie coverts fuscous; greater coverts and outer tertials mouse gray, edged with pinkish buff to dull buffy white; primaries and secondaries fuscous- brown to fuscous-black, with the inner webs white except at tips; the outer web of the outermost primary pale buffy brown for a space of 20 mm toward tip; fourth  Aedicnemus voci/er L'Herminier, Mag. Zool., vol. 7, cl. 2, 1837, pl. 84 and text. (Maturin, Monagas, Venezuela.) and fifth primaries with outer web extensively white near center; central pair of rectrices hair brown, with an indistinct subterminal band of buffy brown; the others hair brown, tipped with fuscous-black, and barred broadly with white; a broad superciliary stripe, lower eyelid, and side of head in a line from back of the eye to the side of the nape white; lower side of head from the malar area back over the auricular region dull buffy white lined with fus1/2ous; lower foreneck and breast drab gray, changing to hair brown at the sides and across the posterior margin; lower flank feathers, 1/2rissum, and under tail coverts pinkish buff to pale pinkish buff; throat, posterior malar area, a narrow line down center of foreneck, extreme lower breast, abdomen, and sides pure white; under wing coverts white with the outer feathers margined with drab gray, and the longer, posterior row edged and tipped with that color. Lower section of maxilla, below and behind nostril, and mandibular rami dull pale glaucous-green; rest of bill dull black; tarsus and 1/2rus light olive-gray; toes olive-gray; claws fus1/2ous-black (from dried skin). Measurements.--Males (6 specimens), wing (measured flat) 240-253 mm (average 245), tail 115.5-124.3 (117.8), 1/2ulmen from base 47.3-49.4 (48.6), tarsus 101.5-115.0 (108.5). Females (3 specimens), wing (measured flat) 242-249 mm (average, 244), tail 115.6-122.5 (119.6), culmen from base 46.9-53.1 (49.8), tarsus 101.0-111.8 (107.5). Range.--Savannas of northeastern Colombia from extreme northeastern Magdalena (Casacart, Affmques) through the Guajira Peninsula (Distracci6n, Maicao, Cojoro, Puerto L6pez, Nazaret, Puerto Estrella). There is also an isolated population on the savannas of the upper Magdalena region in Huila (near Villavieja). This race has been recorded also near the lower Rio Magdalena in Atlntico (Palmar de Varela, E1 Paraiso, Arroyo de Piedras, Tocahagua). Remarks.--The pale coloration that marks this race is apparent at a glance in the excellent series that we have had available from the Guajira. Carriker in 1942 found this bird at the northeastern boundary of the Department of Magdalena at Casacar&, and three years later took one specimen a little farther north at Attnques. The isolated colony, above-mentioned, of this thick-knee in the savanna region of the upper Rio Magdalena in northern Huila, is known mainly from the observations of Alden H. Miller. Dr. Miller kindly has placed at our disposal three specimens that he collected near Villavieja, two in January and February, 1945, and one in February, 1949. These are faintly darker than the Guajira birds, but sufficiently like them so that this remote population may be included under the same name. Another population is reported on the basis of a few records from the lower Magdalena in eastern Atltntico. We have not studied specimens from that population, but this area is included in the range above on the basis of probability. The name pediacus is from the Greek word pediakos meaning "of the plains." In conclusion, it is pertinent to indicate that the thick-knee, known as Alcarabtn, is kept regularly in the patios and corrals of country houses, and that in this semi- domestic state they often are transported for considerable distances. It is this that has led to misunderstanding in some pub!ished records of occurrence, as for example in Panamir, and on Isla Margarita, Venezuela, where these birds are not found in the wild state. In April and May, 1941, the senior author found these birds common across the dry savannas from Maicao east to Puerto L6pez and Puerto Estrella. Near Nazaret in the Serrania de Macuire they range to the foot of the slope below the settlement. They were seen in pairs, sometimes in small bands, and often must have been over- looked as they moved quietly aside, when approached, to the cover of low bushes and there remained motionless. When startled they ran a few steps with wings spread, and then, after gaining slight momentum, flew easily and swiftly, often uttering chattering calls. While they were widespread it is probable that they will be reduced in number as increasing human settlement encroaches on their range.--ALExAm)R WETOR, Research Associate, Smithsonian Institution, Washington 25, D.C., and J. I. BORRRO H., Instituto Forestal, Medellin, Colombia.