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Show 877.] ON THE BIRDS OF TONGATABU, FIJI, ETC. 723 8. Reports on the Collection of Birds made during the Voyage of H.M.S. 'Challenger.' No. IV. On the Birds of Tongatabu, the Fiji Islands, Api (New Hebrides), and Tahiti, By Dr. O. FINSCH, C.M.Z.S. [Eeceived October 3, 1877.] A. BIRDS OF TONGATABU, FRIENDLY GROUP. anl^VS?0 n ?*"*?"' The? Were collected on JulJ 2°> ana ll, | b74. Only nine species are represented in the series. 1. COLLOCALIA SPODIOPYGIA, Peale. Collocalia spodiopygia, F. & H. Ornith. Central-Polyn. p. 48 ; H^i8%%18L6:?'m (T°"Sa); F-h, Journ. Muys.GPodeffr: Ton01!)™1™' SP*? F* & H' J°Urn' f' 0rn' ,870' P- 125 (uest> No. 11. Tongatabu. " These little Swallows were seen flying about in numbers on every part of the island at which we were. Shot July 20 " - / M , 7jd^S.£°m ^e difference in the structure of the nests obtained by Dr. Graffe from Tongatabu (/. s. c.) and those from the Fijis (Orn. Centra -Polyn. p. 276, t. xiv.), I expected to find a different species of Collocalia inhabiting the Friendly group; but on examining the specimens before me, I find them exactly like those from the lijis and Navigators'. The structure of the nests seems to vary individually. (Cf. Finsch, Journ. f. Ornith. 1872, p. 35, Upolu.) rectr. rectr. •Long. alse. intern. ext in. hn. in. lin. lin. Hn. 4 1 18 21 Tongatabu. 6 1 42 15-18 19-20 Fiji (6 specimens). 4 1-4 5 18-20 21-23 Navigators'(3 specimens). Mr. Layard enumerates also C. vanicorensis among the birds of longa, although it was not detected by him. On this latter species compare Finsch, Journ. Mus. Godeff. Heft xii. 1876, p. 23. Its occurrence in the Fijis, which has been alleged by us (Orn. Central- Polyn. p. 47) upon the faith of a specimen sent us by Dr. Graffe, the only one we saw said to be from thence, is very doubtful. 2. HALCYON SACRA (Gm.). Halcyon sacra, F. & H. Ornith. Central-Polyn. p. 32; P. Z. S 1869, p. 545 (Tonga); Journ. f. Orn. 1870, p. 1241 (Tonga)' Layard, P.Z.S. 1876, p. 501. *' No. 2. Tongatabu. Male. 3. „ Male. 4. ,, Female. 5. ,, Female. |