3. TACHYCINETA. i lo 



b'. Grefiter wing-coverts never edged with 

 white; inner secondaries sometimes nar- 

 rowly margined (yomig or winter plu- 

 mage). 

 a '. Upper surface steel-blue or greenish blue : 

 ^^^ no black spot on fore part of cheeks. 

 a ". Larger; wing 4-4-'3 inches : supraloral 

 streak of white broad and distinct 

 and extending across the base of the 



A'" „™'®j^'^'^'i •••••• A leucorrhous, p. 114 



b . Smaller ; wmg 3-9 inches : supraloral ' ^ 



streak smaller and not extendino' 



b . Upper surface purplish blue ; a black spot 



on the fore part of the cheeks meveni n 1 1 fi 



. Rump never white; throat pure white, like ^ ' ^' 

 ^ rest of under sm-face. 

 c'. Upper surface uniform glossy green ; upper 



tail-coverts like the back ^"^ Ucolor nil? 



d. Upper tail-coverts bluish green or purplish 'V-'-^i- 



contrastmg with the back, which is oily or 



bronzy green. 



c". Smaller: with a large white patch on 



each side of the rump; tail nearly 



square ; a white spot above and behind 



jii J „ -^ ■ ■ ■,'.', thalassinus, p. 119 



d . Larger : no white patch on side of rump ; ^ 



tail very much forked cyaneoviridis, p. 121. 



1. Tachycineta albiventris. 



Hirondelle a ventre blaiic de Cayenne, Daubent. PI. Enl. vii. pi. 546. 



White-winged SwaUow, Lath. Gen. Syn. ii. pt. 2. p. 577 a78S^ 

 Hirundo albiventer, Bodd. Tabl. PI. Enl. p. 32 (1783 ev DanhLf \ • 



Hirundo leucoptera, Gm. Syst. Nat. i. p. 1022 (1788^ • nn,h A 



(1848) ; Tsckudi, Faun. Peruan. p. 1.32 (1855) i- "'-^ 



Herse leucoptera, Bp. Co7isp. i. p. 341 (1850) 

 Petrochelidon leucoptera, Cab. Mus. Hein. Th. i. p 49 (1850^ 

 PetoocMidon albiventer, Ca,s. Cat. Hirund. Mus.PhUad. Acad. p. 5 



Cotyle leucoptera, Burm. Th. Bras. iii. p. 143 (1856) 

 Petrochehdon albiventris, «c/aiJ«-, Ca^. Amer.B.Jll (1862)- id 



I'm, T8S,'p 'S '■ '''■' ^''- ^- ^'- PP ''' ^^^\ 



r -iiP^-^> P- ^ ; ^^- 0>'n- Perou, 1. p. 239 (1884) ' 



r' Hirundo leucorrhoa, Forbes, Ibis, 1881, pp. 315, 329. 



Ad^dt male General colour above glossy steel-blue, rather 

 greencr^on the back, the hind neck and mantle mottled with white 



