144 MR. SCLATER ON THE AMERICAN CAPRIMULGID^. [Feb. 27, 



fere pari longitudine, sept. oct. et nono longissimis, decimofere 

 dimidio breviore. 

 5 . Remigibus fuscis, rufo fascia t is ; qu atuor extends fere cequa- 



libus et longissimis . 

 Hab. Interior of Brazil ; Mattogrosso, Goyaz, Ypanema, Ciniiterio, 

 Curytiba, Ytarare, and Irisanga (Natt.). 



Herr von Pelzeln has lately shown (I. c.) tbat the very abnormal 

 form of the wing in this bird is peculiar to the male sex. 



Mr. Gould's original specimen of this bird is now in the British 

 Museum. Besides the examples of this scarce bird mentioned by 

 Herr von Pelzeln, I have seen it in the private collections of Mr. 

 Eyton and of the late Baron de la Fresnaye. 



Subsect. B. Terricolce : tarsis elongatis, implumibus ; rostro di- 

 latato. 



Genus 8. Nyctidromus. 



Nyctidromus albicollis. 



Caprimidgus albicollis et C. guianensis, Gm. S. N. i. p. 1030. ' 

 Nyctidromus americanus, Cassin, Pr. Ac. Phil. 1851, p. 1 79 ; Cab. 



& Hein. Mus. Hein. iii. p. 92 ; Scl. & Salv. Ibis, 1859, p. 125 (nee 



C. americanus, Gm.). 



Nyctidromus guianensis, N. albicollis, N. derbyanus, N. grallu- 



rius, et N. affinis, auctt. var. 



3 . Rectricum pari tertio et quarto (a medio) fere omnino albis. 



$ . Rectricum pari tertio et quarto nigris, fulvo transvittatis, 

 apicibus albescentibus. 



Hab. Whole of Central and Southern America west of the Andes, 

 from Southern Mexico (Xalapa, Salle) to Southern Brazil ; very 

 common in British Guiana (Schomb.) ; Vera Paz, common (Salvin); 

 Upper Ucayali (Bartlett) ; common in collections from Bogota. 



Messrs. Cabanis and Heine have given a long list of the many 

 synonyms of this species (/. s. c), which I believe to be quite cor- 

 rect (with the exception of Capr. americanus, Gm., which belongs to 

 Si})honorhis) and need not now repeat. I agree with these gentlemen 

 in considering that all the specimens met with from the various loca- 

 lities mentioned above are referable to one species. The South- 

 Brazilian specimens (N. derbyanus) are generally larger; but in Mr. 

 Salvin's extensive series of skins of this bird from the Vera Paz some 

 of the males are quite as large. Bogota skins, on the other hand 

 (N grallanus), are usually rather small. 



Genus 9. Siphonorhis. 

 1. Siphonorhis Americana. 



Caprimidgus jamaicensis, Briss. Orn. ii. p. 480. 

 C. americanus, Linn. S. N. i. p. 346. 



Siphonorhis americanus, Sclater, P. Z. S. 1861, p. 77, et Am. Cat. 

 p. 282. 



Hab. Jamaica (Osbum). 



