16 FISSIROSTRES DIURN.&. 



Apus (Pallene) collaris Less. Compl. Buff. viii. p. 493. 

 Pallene collaris Boie, Isis, (1844) p. 168. 

 Cypselus torquatus Licht. 



Hirundo albicollis Vieill. N. Diet. dHist. Nat. xiv. p. 524.' 

 Hirundo zonaris Shaw, Cim. Phys. pi. 55. ? 

 PL col. 195.; Vieill. Gal.des Ois. 1. 120. 



a, b. Brazil. Presented by Lord Stuart de Rothesay. 



c. British Guiana. From Sir R. Schomburgk's Collection. 



d. Caraccas. From Mr. Dyson's Collection. 



e. Brazil. ? Presented by M.-Gen. Hardwicke. 



4. ACANTHYLIS PELASGiA. The aculeated Swallow. 



Hirundo pelasgia Linn. S. N. i. p. 345. 



Acanthylis pelasgia G. R. Gray, List of Gen. of B. (1840) p. 8. 



Chsetura pelasgia Steph. Gen. Zool. xiii. p. 76. 



Apus (Pallene) pelasgia Less. Compl. Buff. viii. p. 494. 



PL enl. 726. f. 2. ; Vieill. Ois. cTAmer. Sept. t. 33.; Wils. Amer. 

 Orn. pi. 39. f. 1. ; Audub. B. of Amer. pi. 158. 



a. North America. Presented by J. Audubon, Esq. 



b. North America. Presented by Dr. Ridgeway. 



5. ACANTHYLIS ? The Acanthylis. 



a. Caraccas. From Mr. Dyson's Collection. 



6. ACANTHYLIS POLIOURA. The grey- tailed Acanthylis. 

 Cypselus poliourus Temm. PL enl. 726. f. 2. 



a. Cayenne. From Mr. Warwick's Collection. 



7. ACANTHYLIS SPINICAUDA. The grey-backed Acanthylis. 



Gypselus spinicaudus Temm. 

 Acanthylis spinicauda Boie, Isis, (1826) p. 971. 

 Hirundo pelasgia var. Lath. 

 PL enl. 726. f. 1. 



a. Brazil. ? From Mr. Leadbeater's Collection. 



8. ACANTHYLIS SABINI. The white-backed Acanthylis. 



Chaetura Sabini Gray, Griff. An. Kingd. ii. p. 70. 

 Acanthylis Sabini G. E. Gray, Gen. of B. i. p. 

 Chaetura bicolor Gray, Zool. Misc. p. 7. 

 Pallene leucopygia Boie, Isis, (1844) p. 168. 



a, Western Africa. Presented by Col. Sabine, R. A. 



