J -12 MR. SCLATER ON THE AMERICAN CAPRIMULG1D.E. [Feb. 27, 



by Mr. E. Bartlett on the Ucayali, which must in all probability be 

 the same as Tschudi's bird. However, as this is not quite certain, 

 I prefer to retain Natterer's MS. name for the species, particularly 

 as it was published by Tschudi at the same time as his own. Tschudi 

 gives no locality for his H. climococerca, but states that II. trifur- 

 catus was obtained by Prof. Poeppig in the province of Maynas. 



The specimens of this bird collected by Schomburgk in British 

 Guiana, and referred to this species by Mr. G. R. Gray in his ' Cata- 

 logue of Nocturnal Fissorostres,' are perhaps of a different species, 

 and may be separated as follows : — 



2. Hydropsalis schomburgki. 

 Hydropsalis schomburgki, G. R. Gray in Mus. Brit. 



Similis H. trifurcato, sed minor et obscurior ; caudce rectricibus 

 duabus mediis latius et magis distincte nigro fasciatis ; ventre 

 toto nigro maculato, ci'isso solum albo. 



Hab. British Guiana (Schojnb.). 



Mus. Brit. 



Subgen. 2. Hydropsalis. 



3. Hydropsalis torouata. 



Caprimulgus torquatus, Gm. S. N. i. p. 1032. 

 C. psalurus, Temm. PI. Col. 157, 158. 

 Hydropsalis asarte, Wagl. Isis, 1833, p. 1222 (?). 

 Psalurus macropterus, Sw. Cab. Cycl. Birds, ii. p. 339. 

 Hydropsalis torquatus, Cassin, Journ. Ac. Phil. ii. p. IN. 

 H. psalurus, Burm. Syst. Ueb. ii. p. 381. 



(S . Fusco et ochraceo variegata, torque collari postico rufo : 

 rectricibus externis proximas dimidio excedentibus ; vexillo in- 

 terna nigro, intus albo limbato, ad basin ochraceo transfasciato: 

 rectr. mediis proximum par plus quam pollice superantibus : 

 long, tola 14"5, alee 6'5, caudce rectr, ext. 1 1, med. (i'5. 



5 . Subtus fere omnino fulva, nigro transradiata ; cauda breviore 

 et magis quadrata. 



Hab. South-eastern Brazil, Lagoa Santa {Burm.). 



4. Hydropsalis pallescens. 



Hydropsalis pallescens, Von Pelz. Verh. Z.-b. Gesellsch. in Wien, 

 Nov. 8th, 1865, p. 986. 



Similis H. torquatse, sed major et coloribus pallidioribus. 



Hab. Brazil, Matto Grosso and Forte do Principe (Natt. no. 1018). 



I have as yet only seen the female of this species, which has been 

 most kindly sent to me by Herr von Pelzeln out of the duplicates in 

 the Vienna collection. 



I think it very probable that Azara's Ibiyau cola de tixera (no. 309) 

 may belong to this species, and not, as generally referred, to //. tor- 

 quata. If this be so, the species will be entitled to be called II. fur - 

 cifera, the Capr. furcifer, Vieillot (Nouv. Diet. x. p. 242, et Enc. 

 Meth. p. 542), being founded upon Azara's description. 





