1866. ] MR. SCLATER ON THE AMERICAN CAPRIMULGID.fi. 143 



Subgen. 3. Macropsulis. 



The species of this group may be differentiated as follows by their 

 two external elongated tail-feathers : — 



a. Rectrice externa elongata nigra, intus usque ad finem late "1 H. forcipata. 



albo limbata J H. ypanemce. 



b. Rectrice externa elongata nigra, apice albida, intus ad basin 



anguste rufo limbata H. hjra. 



r. Rectrice externa elongata nigra, rachide alba, extus rufo vit- 



tata H. segmentata. 



Mr. Cassin has given excellent descriptions of three of them, and 

 illustrations of their tail-feathers in the ' Journal of the Philadel- 

 phia Academy.' Herr von Pelzeln has lately described a fourth spe- 

 cies allied to H. forcipata. 



5. Hydropsalis forcipata. 



Caprimulgus forcipatus, Nitzsch, Pterylographie, p. 125. 

 Hydropsalis limbatus, Cassin, Journ. Ac. Phil. ii. p. 115. 

 Caprimulgus megalurus, Licht. MS. 

 Hydropsalis forcipatus, Burm. Syst. Ueb. ii. p. 380. 

 Hab. S.E. Brazil, Organ-mountains (Burm.). 



6. Hydropsalis ypanemce. 



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

 Nov. 8th, 1865, p. 985. 



Similis H. forcipatse, sed minor, et in mare remige secundo primum 

 fere cequante, et rectricibus duabus mediis brunneo transverse 

 fasciatis, secundam et tertiam longitudine super antibus diversa. 



Hab. Ypauema, Brazil (Natt. no. 10-19). 



7. Hydropsalis lyra. 



Hydropsalis lyra, Bp. Consp. p. 59 ; Cassin, Proc. Acad. Philad. 

 1849, p. 238, et Journ. Acad. Phil. ser. 2. ii. p. 116. 



Hab. Interior of New Granada, received in collections from Bogota. 



8. Hydropsalis segmentata. 



Hydropsalis segmentata, Cassin, Proc. Acad. Philad. 1849, et 

 Journ. Acad. Philad. ser. 2. ii. p. 116 ; Sclater, Am. Cat. p. 281. 

 Antrostomus, sp. ?, Sclater, Am. Cat. p. 280, sp. 1683 ( ? ). 

 Hab. Interior of New Granada, aud Ecuador, Matos (Fraser). 



Genus 7. Heleothreptus. 

 Heleothreptus anomalus. 



Amblypterus anomalus, Gould, P. Z. S. 1837, p. 105; Ic. Av. 

 pt. i. pi. 1. 



Eleothreptus anomalus, G. B. Gray, List of Gen. p. 7 (1840) ; 

 Burm. Syst. Ueb. ii. 383; Von Pelzeln, Zool. d. Novara-Reise, Vogel, 

 p. 36 (note). 



$ . Remigibus prim, falciformibus nigris, omnibus intus ad basin 

 et qitinque externis item ad apicem fulvis ; prim, sex externis 



