_Siphonorhis_ Sclater, P.Z.S. 1861, p. 77. Type: _Caprimulgus
americanus_ L.
"The bill is extremely broad at base, the tip strong and heavily decurved;
nostrils tubular and very prominent; rictal bristles strongly developed.
Wing pointed, third primary longest; tail rounded, almost graduated. Tarsi
long and naked. The sexes differ slightly in coloration. (Hartert.)"