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Show 150 MR. O. SALVIN ON THE BIRDS OF VERAGUA. [Jan. 24, 138. CHIROXIPHIA LANCEOLATA, Wagl.; Scl. & Salv. P. Z. S. 1864, p. 362. Chiroxiphia melanocephala, Scl. P. Z. S. 1856, p. 141. Santa Fe ; David (Bridges). The purely Central American species (C. linearis, Bp.) terminates its southern range between the Gulf of Nicoya and Chiriqui. 139. CHASMORHYNCHUS TRICARUNCULATUS, J. & E. Verreaux, R. Z. 1853, p. 193; Salvin, Ibis, 1865, p. 90, pl. 3. Santiago de Veragua ; Cordillera de Tole. Adult male specimens having been sent by Arce, the question broached by Cabanis as to the possibility of the Costa Rican and Veraguan birds being distinct is quite set at rest. These specimens in no way differ from those previously sent by Arce from Tucurriqui. 140. CEPHALOPTERUS GLABRICOLLIS, Gould, P. Z. S. 1850, p. 92, pl. xx.; Cab. J. f. O. 1861, p. 254; Sclater, P. Z. S. 1859, p. 142. Cordillera de Tole; Cordillera of Chiriqui (Warszewicz). This strange bird appears to be abundant in this locality, and also near Turrialba in Costa Rica. Its probable range hardly extends beyond these points, though it may occur along the northern frontier of Costa Rica, the river San Juan, and the southern shore of the lake of Nicaragua. Judging from the apparently sharp definition of its southern range, I should suppose it a bird that frequents the mountainous region and keeps to forests lying at an elevation of from 2000 to 3000 feet above the sea-level. Arce has sent home specimens of both sexes. The female has the crest smaller, as is the case in C. ornatus, the naked throat-lappet much smaller, and a narrow band of small feathers running down the centre of the bare throat. The head of the young bird very much resembles that of the adult of Pyroderus, to which genus Cephalopterus is closely allied. 141. MOMOTUS LESSONI, Less.; Sclater, P. Z. S. 1856, p. 139; Lawr. Ann. N. Y. Lye. viii. p. 1 77. Momotus psalurus, Bp. ; Cab. J. f. O. 1861, p. 255. Cordillera de Tole'; David (Bridges; Hicks). An immature specimen, having a black margin to the back of the blue circlet of the head and without the chestnut nape, must indubitably be referred to the Central American Momotus lessoni. The specimens examined by us, and mentioned in Mr. Sclater's and my paper " on the Birds of Panama" (P. Z. S. 1864, p. 362) as M. lessoni, properly belong to M. subrufescens, Scl., as additional specimens have shown. This last-named race has no black border to the back of the circlet of the head, the nape being slightly chestnut as in M. brasiliensis. The colouring, too, of the under plumage is of a clearer rufous than is usually the case in M. lessoni, in which race however, considerable variation is shown in this respect. It is probable that the southern range of the true M. lessoni terminates in |