FAMILY CAPRIMULGIDAE I99 



Our 3 specimens, 1 from Bocas del Toro and 2 from Isla Cebaco, 

 agree in color with the type of Lurocalis semitorquatus noctivagus 

 named by Griswold from 1 taken at the northern end of Madden 

 Lake. These 4 in turn differ from the only other specimen yet recorded 

 from Central America, a female collected by Wharton Huber on the 

 Rio Bambana (originally cited as Banbana) in northeastern Nicara- 

 gua. This bird has the primaries from the innermost to the eighth 

 tipped with rufous, edged distally at the end with white, with a similar 

 marking but of lesser extent on primaries 9 and 10. The outer webs 

 of the primaries, except the tenth, are spotted rather heavily with ru- 

 fous. The under tail coverts are pale cinnamon-buff, barred with black. 

 In the 4 from Panama the ends of the primaries are tipped very nar- 

 rowly with white, with only a slight mixture of cinnamon, the rufous 

 spotting on their outer webs is much less, and the basal color of the 

 under tail coverts is dark cinnamon-buff. These slight differences may 

 prove to be merely individual variation when more specimens have 

 been examined. In that case the name will become Lurocalis semitor- 

 quatus stonei Huber, described in the Auk, vol. 40, no. 2, April 11, 

 1923, p. 300, with type locality Rio Bambana, 10 miles above where it 

 is joined by the Rio Prinzapolca. 



CHORDEILES ACUTIPENNIS (Hermann) : Lesser Nighthawk, 

 Tapacamino Menor 



Figure 33 



Caprimulgus acutipennis Hermann, Tabl. Affin. Anim., 1783, p. 230. (Cayenne.) 



Like the common nighthawk but smaller ; with the white wing band 

 across 4 (occasionally 5) outer primaries, located nearer the tip of 

 the wings, beyond the center. 



Description. — Length 190-220 mm. Two poorly defined color phases, 

 one darker, one grayer. Outer webs of primaries spotted heavily with 

 cinnamon-buff to buff. Male distinguished from female by a white bar 

 across the end of the tail, otherwise sexes similar in color. Adult, 

 crown black, lined and spotted irregularly with buff to grayish white ; 

 wings black, spotted and barred heavily with buff ; a white band across 

 4 (in some 5) outer primaries, located beyond the center toward the 

 tip of the wing; tail barred heavily with black and grayish white, 

 mottled with dull black; rest of upper surface mottled with grayish 

 white and buff (varying in depth of brown) streaked irregularly on 

 the back, and barred on the rump and upper tail coverts with black ; 

 wing coverts dull black spotted heavily with buff and white ; foreneck 



