494 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



bb. Wing abnormal in both sexes, four (in female) to six (in male) primaries being 



equal and longest Eleothreptus (extralimital).o 



aa. Palate desmognatlious;& rictal bristles minute, scarcely obvious; inframan- 

 dibular region thickly feathered ;c lower cervical pteryla with a prominent 

 inner tooth ;c maxilla with a curved lateral channel. (Chordeilinse .) 

 b. Tail more than half as long as wing, simply or doubly emarginate. 

 c. Tenth (outermost) primary equal to or longer than ninth; nostrils large, open, 

 without superior operculum; plumage of forehead shorter, much more flat- 

 tened; lateral rectrices longest; secondaries 13. 

 d. Primaries relatively narrower terminally; tail simply (usually deeply) 



emarginate, the middle rectrices shortest Chordeiles (p. 559). 



dd. Primaries relatively broader terminally; tail doubly (shallowly) emar- 

 ginate, the middle rectrices longer than next two pairs. 



Nannochordeiles (extralLmital).(^ 

 cc. Tenth primary shorter than ninth; nostrils small, nearly covered by a broad, 

 timiid operculum; plumage of forehead longer and more full or elevated; 

 lateral rectrices shorter than next pair; secondaries 12? 



Nyctiprogne (extralimital).c 



hb. Tail not more than half as long as wing, truncate. 



c. Tarsus shorter than middle toe without claw, the upper portion feathered in 



front; tenth (outermost) primary longer than eighth; tail less than half as 



long as wing; rictal bristles not obvious; secondaries 13; no white on under 



parts of body Lurocalis (extralimital)./ 



cc. Tarsus longer than middle toe without claw, entirely naked; tenth (outer- 

 most) primary shorter than seventh; tail half as long as wing; rictal bristles 

 obvious; secondaries 15; under parts of body white. 



Podager (extralimital ).ff 



a Amblyptems (not of Agassiz, 1833) Gould, Proc. Zool. Soc. Lond., 1837, 105. 

 (Type, A. anomalus Gonld.)— Eleothreptus Gray, List Gen. Bhds, 1840, 7. (New 

 name to replace Amblypterus Gould, preoccupied.) — Helcothrejitus (emendation) 

 Sclatcr, Proc. Zool. Soc. Lond., 1866, 143. 



Central Brazil to Argentina. (Monotypic.) I have not seen this genus. 



ft At least in Chordeiles. 



c These characters (given by Hubert Lyman Clark for Chordeiles, in Proc. U. S. 

 Nat. Mus., xvii, 1895, 553, 557, 558) arc assumed to be present in Nannochordeiles, 

 Nyctiprocne, Lurocalis, and Podager, the pterylography of which has not been studied. 



d Nannochordeiles Ilartcrt, Ibis, ser. 7, ii, July, 1896, 374. (Type, Chordeiles pusillus 

 Gould .) (Nawoc, dwarf + Chordeiles, x^P^, a harp string ; dslXr) , evening.— Richmond . ) 



British Guiana to Brazil. (Monotypic.) 



e Nyctip)rogne Bonaparte, Consp. Syst. Orn., 1854, 35. (Type, Caprimulgus leuco- 

 pygus ?ji^\yi.)—Podochxtes Sclater, Proc. Zool. Soc. Lond., 1866, 133, 135. (Type, 

 Caprimulgus leucopygus Spix.) 



British Guiana to southern Brazil. (Monotypic.) In an imperfect specimen of 

 N. leucopygus, the only one I have been able to examine, there are apparently only 

 12 secondaries. 



f Lurocalis Cassin, Proc. Ac. Nat. Sci. Phila., v, 1851, 189. (Type, Caprimulgus 

 na«erm Temminck=C. semitorquatus Gmelm. )—Urocolus (emendation) Cabanis and 

 Heine, Mus. Hein., iii, Sept. 7, 1860, 87, 90. ("Von oupa (Schwanz) und koXoc 

 (gestutzt, verkiirzt." — Cabanis and Heine.) 



Colombia to Cayenne, Peru, and southern Brazil. (Two species.) 



g Podager Wagler, Isis, 1832, 277. (Type, Caprimulgus diumus Maximilian=C. 

 nacunda Yieillot.)—Proithera Swainson, Classif. Birds, ii, 1837, 339. (Type, Capri- 

 mulgus diumus Maximilian=C. nacunda Vieillot.) 



South America, east of the Andes. (Monotypic.) 



