7. CHELIDOPTERA. 207 



7. CHELIDOPTERA. „^ 



Type. 

 Chelidoptera, Gould, P. Z. S. 1836, p. 81 C. tenebrosa. 



Chelidoptcra is a well-marked form of Buccoaidce, differing from 

 the other members of the famil}^ in its lengthened wings and 

 shortened tail. The bill is also short and slender and much 

 compressed. 



This genus extends over the Neotropical mainland from Venezuela 

 to S.E. Brazil. 



Key to the Species. 



A. Smaller: breast darker; belly more rufous .. 1. fcnebrosa, -p. 207. 



B. Larger: breast lighter ; belly more ochraceous. 2. brusiliensis,f. 208, 



1. Chelidoptera tenebrosa. 



Le petit Ooueou noir de Uayeuue, J^itff. Hist. Xat. Ois. vi. p. 417 ; 



Daub. PI. Enl. 505. 

 Gucuhis tenebrosus, Pallas, Neiie Nord. Beyti: iii. p. 2 ; Gm. S. K. 



i. p. 417 ; Lath. Ind. Oni. i. p. 221. 

 Le Barbacou a croupiou blanc, Levaill. Ois. de Par. ii. p. 105, 



t. 46. 

 Mouasa tenebrosa, Vieill. Nouv. Diet. xxi. p. 321 ; id. Enc. Met/i. 



p. 1339 ; Less. Tr. d'' Orn. p. 157. 

 White-rumped Cuckow, Lath. Gen. Hist. iii. p. 324. 

 Mouasa teuebrio, Temm. PI. Col. 323. fig. 1. 

 Lyporuix tenebrosa, War/l. Si/st. Av. Lypornix, sp. 7. 

 Chelidoptera tenebrosa, Gould, P. Z. S. 1836, p. 81 ; Gray et Mitch. 



Gen. B. i. p. 7-j ; Cab. in Schomb. Guian. iii. p. 720 ; Gray, List 



Fiss. B. M. p. 50 ; Bp. Consp. i. p. 148 ; Scl. Ann. Nat. Hist. ser. 



2, xiii. p. 482 ; id. Si/n. Bucc. p. 2i ; id. P. Z. S. 1855, pp. 136, 



I'Jfj ; id. Cat. A. B. p. 275 ; id. Monogr. Jac. and Pujf-bds. p. 161, 



pi. Iv. fig. 1 ; Peh. Sitz. Ak. Wien, xx. p. 513 ; id. Orn. Bras. 



p. 2> ; Cab. et Hein. Mas. Hein. iv. p. 124 ; Scl. et Salv. P. Z. S. 



1806, p. 192, 1867, pp. 58.3, 752, 1870, p. 781, 1873, pp. 186, 295 ; 



lid. Nomencl. p. 106 ; Tacz. P. Z. S. 1882, p. 44 (N.E. Peru) ; id. 



Orn. Per. iii. p. 136 ; Salv. Ibis, 1886, p. 63 (Brit. Guiana) ; W. 



L. Sclater, Ibis, 1887, p. 318 (Brit. Guiana) ; Berl. J.f. O. 1880, 



p. 309. 

 Chelidoptera albipennis, Bp. J.f. O. 185.3, p. 47; Scl. Ann. Kat. 



Hist. ser. 2, xiii. p. 483 ; id. Si/n. Bucc. p. 24, t. iv. ; Cab. et Hein. 



Mus. Hein. iv. p. 124. 



Above bronzy black, rump white : beneath as above, upper part 

 of belly passing into cinereous ; lower belly chestnut ; flanks, 

 crissum, and under wing-coverts white ; bill black, feet brownish 

 black : whole length 5-7 inches, wing 4, tail 1"9, bill from gape 0'9. 

 Female similar. 



Hab. Venezuela, Guiana, and Amazonia. 



a. 2 ad. sk. Merida, Venezuela {Goering). Salvin-Godman Coll. 



6. Ad. sk. Trinidad (?). Sclater Coll. 



c, d. Ad. St. British Guiana. Sir R. Scbomburgk 



[C.]. 



