Paxon, t. c. p. 102 ; Brittain & Cos, t. c. p. 118 ; Dutclier, t. c. p. 130 ; Lawr. 

 t. c. p. 201 ; Pindar, t. c. p. 315 ; Scott, t. c. p. 325 ; Beldiiig, Occ. Papers Calif. 

 Acad. Sci. ii. p. 188 (1890) ; Eiker & Cliapm. Auk, vii. p. 267 (1890) ; Thomps. 

 Proc. U. S. Nat. Mus. xiii. p. CIO (1890) ; Scott, t. c. p. 312 ; Clierrie, t. c. 

 p. 335 ; Merriam, N. Amer. Paima, no. 3, p. 98 (1890) ; id. op. cit. no. 5, p. lOi 

 (1891) ; Hagerup, B. Greenl. p. 60 (1891) ; Cory, Auk, viii. p. 352 (1891) ; 

 Cherrie, Auk, ix. p. 22 (1892) ; Lawr. t. c. p. 16 ; Cory, t. c. p. 48 ; Dwight, t. c. 

 p. 138 ; Coombs, t. c. p. 206 ; Scott, t. c. p. 213 ; RidgAV. t. c. p. 307 ; Attwater, 

 t. c. p. 310 ; Lawr. t. c. p. 356 ; Anthony, t. c. p. 366 ; Hatcli, B. Minnesota, 

 p. 352 (1892) ; Cory, Cat. W. Ind. B. p. 115 (1892) ; Fislier, N. Amer. Faun, 

 no. 7, p. 110 (1893) ; Dwight, Auk, x. p. 12 (1893) ; Todd, t. c. pp. 40, 45 ; Scott, 

 t. e. p. 181 ; Yfhite, t c. p. 226. 

 Hirundo rustica erijthrogastra, Ilartert, Ivat. Vogels. Senckenb. Mus. p. 99 (1891) ; 

 Tacz. Mem. Acad. Imp. St. Petersb. (7) xxxix. p. 178 (1891). 



H. similis H. gutturali et torque praepectorali eodem modo internipto, sed gastrseo pallide cerviuo dis- 

 tinguenda. 



Hah. in America boreall et in Siberia orlentali testivans, in regione Neotropicii fere tot;!, ct in subregioue 

 ludo-Burmanic^ hibernans. 



Adult male. General colour above glossy purplish blue, varied with white on the mantle and back, where 

 the white bases to the feathers show through ; lesser aud median wing-coverts like the back ; 

 greater coverts, bastard-wing, primary-coverts, and quills blackish, with a purplish-blue gloss 

 on the outer web, inclining more to steel-green on the outer webs of the bastard-wing and 

 primary-coverts ; the innermost greater coverts ashy on their inner webs, w'ith a strong rufous 

 tinge ; tail-feathers blackish with a steel-green gloss, all but the centre ones with a large rounded 

 white spot increasing in size towards the outermost, where it is a large oblique mark; forehead 

 deep bay or chestnut, extending slightly backwards over the eye; lores black; ear-coverts 

 purplish blue like the iiead; cheeks and entire throat deep bay, of a diflereut colour to the 

 rest of the under surface, but not separated from the chest by a complete band ; the sides of 

 the neck glossy purplish blue like the back, this colour impinging on to the sides of the fore 

 neck in a half-creseent-shape, but not forming a band across ; under surface from the chest 

 downwards, including the under wing-coverts and axillaries, clear rufous, deepening into chest- 

 nut in the region of the vent; the under tail-eoverts with blackish shaft-lines; some of the 

 lesser wing-coverts near the edge of the wing mottled with ashy-brown bases ; quills ashy brown 

 below. Total length (i'S inches, culmcn 0'35, wing I'ou, tail 3'45, tarsus 0' 15. 



Adult female. Similar to the male in colour. Total length G'7 iuclics, culmen Q-'6~), wing I'j, tail o'23, 

 tarsus 0"4. 



Yourif/ birds are much duller in colour than the adults^ beiiip: dusky l)r()\vn above with a liluc gloss ; on 

 the rump remains of narrow rufous margins; i[uills with n;ui\iw whitish edges at the ti])s; 

 frontal band very small and pale rufous ; throat also pale rufous ; the rest of the under surface 

 very light rufescent buff, deeper on the nuder tail-coverts ; ou the lower throat some remains of 



blackish mottliiigs, but n(jt forming a cross band. 



