151 

 GAMPSONYX SWAINSONI. 



Gampioiu/x swaiiisoiriViG. Zo'ol. Jouvu. u, 132^^, G9 ; Isis. 1850, 840. — Stkph. Zoiil. xiii 

 i826.— Less. Mau. i, 18:^8, pt. 2, 36.— Swains. Classif. B. i, 1837, 301 ; ii,210.— 

 Gray, Geu. 1st ed. 4; 2ded. 5; fol. i, 1845, 26, pi. 9, fig-. 4; List B. Bnt. Mu.s. 

 1844,46; Gen. &. Subseu. 1855,6 ; Hand List, i, 1869, 28.— Cabax. Schonib. 

 Eels. Br. Guian. iii, 1848, 735.— Boxap. Consp. i, 1850, 21.— Strickl. Oru. Syn. 

 i,1855, 137.— BuRM. Th. Bras, ii, 1856, 114.— Leot. Ois. Trinidad, 1866, 41.— 

 SCL. & Salv. p. Z. S. 1869, 252 (Maruria, Venez.).— Finsch, P. Z. S. 1870, p. — 

 (Trinidad).— Pelz. Oru. Bras. 1871, 6, 398.— ScL. & Salv. Norn. Neotr. 1873, 

 121.— Sharpe Cat. Ace. B. M. 1874, 340. 



Elanus {Gampsontix) swabisonl Eidgway, Pr. Boston Soc. N. H., 1873,54. 

 Elanus swainsoiii Kaup, Contr. Orn. 1850, 59.— Schl. Mus. P.-B. Milvi, 1862,9. 



'Kcrfits rxfifrons BoiE, Isis, 1828, 314. 



FaJco rufifrons Max. Beitr. Orn. Bras, iii, 1830, 123. 

 Chondrohierax riijifrons Less, (teste Sharpe). 



Elanus torquatus Less. Tr. 1831, 72. — Pucher. E. Z. 1850, 14. 



Wiug^, 5.50-6.30; tail, 3.50-4.30 ; culmen, 0.45-0.50; tarsus, 0.85-0.95; 

 middle toe, 0.75-0.80. Adult: — Forehead and aiiriculars straw-yellow; 

 lower parts white, with a yellowish wash, most pronounced on the sides 

 where there is frequently a tinge of rufous; tibice, axillars, and lining of 

 the wing ochraceous. A patch covering the crown and occiput, and 

 surrounding the eyes, a spot on each side of the breast^ with the entire 

 upper parts brownish-black or dusky-plumbeous ; nuchal collar, sides, 

 and flanks chestnut- rufous, the former with a white one above it, below 

 the dusky of the occiput. Young: — Similar, but nuchal collar entirely 

 white, and feathers of the upper parts usually with rusty borders. 



List of specimens in Vn'ted States National Museum. 



Catalogue- 

 number. 



Condition 

 of speci- 

 men. 



Sex and 

 age. 



Locality. 



From whom received. 



13684 



M. 



— ad. 













Other specimens examined. — In nius. Pbilad. Acad., 4 ; Boston Soc, 3 ; Mus. Corup. 

 Zool., 2 ; G. N. Lawrence, 1 ; total, 11. 



vertical; cere very narrow and compressed on top. Tarsus considerably longer than 

 middle toe ; web l)etween outer and middle toes just appreciable. Tarsus and toes 

 covered uniforu)ly with rough or granular scales of hexagonal or nearly square form ; 

 only the terminal joint of tLie toes with transverse scutellje : claws rounded beneath. 

 Wing very long, swallow-like, the first primary much the longest, and none siuuated 

 on either web. Tail tern-like, nearly equal to wing, forked to about one-half its 

 length, the outer feathers much attenuated. Colors, ashy above, white beneath. 



