370 CYPSELID^. 



Authentic information concerning the migration of this species, if any, is also very 

 deficient. The presence of birds in countries north of Mexico has been recorded 

 between the months of February and September, and in December at San Bernardino 

 in Southern California ; and Dr. Cooper believed ^ that they winter in the canons of 

 the Colorado river ; but this appeared improbable to Dr. Cones, who was inclined to 

 look upon the Guatemala individuals as birds in their winter-quarters. So far as our 

 own experience goes we are satisfied that the Guacalate colony is resident throughout 

 the year, whatever the movements of the northern birds may be, 



PANYPTILA. 



Panyptila, Cabanis in Wiegm. Arch, fiir Naturgesch. 1847, xiii. p. 345 ; Hartert, Cat. Birds Brit. 

 Mus. xvi. p. 461. 



Prof. Cabanis separated this genus from Cypselus in 1847 in his well-known paper 

 on the Classification of Birds, and made P. cayennensis the type. 



Panyptila can be readily distinguished from Cypselus by the feathering of the toes 

 from the end of the tarso-metatarsus to the base of the claws. Its nidification also is 

 very diff"erent from that of Cypselus, as it constructs a large pendent nest of silky seeds 

 which it glues to the under surface of an overhanging rock, Cypselus resorting to 

 crevices and caves in rocks or roofs of buildings. From Aeronautes, Panyptila differs 

 in its more deeply forked tail, the outer rectrices being considerably the longest and 

 very pointed ; the first primary, too, is as long as, instead of shorter than, the second ■ 

 and also sharply pointed. 



Only two species are contained in the genus, of which P. cayennensis has a wide 

 range over Tropical America and just enters our fauna in the Slate of Panama. The 

 other, P. sancti-hieronymi, so far as we know at present, is confined to Guatemala. 



1. Panyptila cayennensis. 



Le Martinet a collier blanc, D'Aub. PI. Enl. p. 725. fig. 2\ 



Hirundo cayennensis, Gm. Syst. Nat. i. p. 1024^. 



Panyptila cayennensis, Cab. ia Wiegm. Arch. f. Naturg. 1847, xiii. p. 345 " ; Layard, Ibis, 1873, 



p. 389 ' ; Salv, Ibis, 1885, p. 436 " ; W. L. Scl. Ibis, 1887, p. 318 ^ 

 Panyptila cayanensis, Scl. P. Z. S, 1865, p. (i06''; Scl. & Salv. P, Z. S. 1879, p. 531'; Hartert, 



Cat. Birds Brit. Mus. xvi. p. 461 \ 



Velutino-nigra, macula supra lorali, torque cervicali, gutfcure toto, macula utrinque hypochondriali et rectri- 

 cibus extemis in pogonio extemo ad basin pure albia ; secundariis ad apicem et primariis internis in 

 pogonio interne (atricte) albo marginatis ; alarum margine extemo et campterio fusco variegatis : rostro 

 nigro, unguibus fuscis. Long, tota circa 5-6, al» 5-0, cauds rectr. med. 1-1, rectr. lat. 22. (Descr. 

 maris ex Samiria, E. Peru. Mus. nbstr.) 



Hab. Panama, Kio Chagres (Memtt).—Som}i America generally from Colombia « and 

 Venezuela 9 to Guiana i 5 ^ the Amazons Valley \ and South-east Brazil 9. 

 Though well known for more than a century, this species is still somewhat rarely 

 represented in collections, due most probably to the difficulty of securing specimens of 



