466 NEW WHIPPOORWILL FROM COSTA RICA RIDGWAY. 



across the sides and middle of the belly, i)osterior to which the pre- 

 vailing color is pale cinnamon-brown (more clay colored or bufi'y on 

 nuder tail- coverts), marked with transverse spots or irregnlar bars of 

 blackish. Under wing-coverts dusky, indistinctly spotted on outer 

 margin of wing with dark rusty ; bill entirely black ; feet blackish, be- 

 coming pale brownish (dull tlesh color in life) on upper and posterior 

 portion of tarsus. Length (skin), about 8.75; wing, G.OO; tail, 4.60; 

 culmen, 0.35; tarsus, 0.G2; middle toe, 0.60. Second and third quills 

 longest; fonrth longer than the first, but the latter very much longer 

 than the fifth. Tail much rounded, the lateral feathers 0.70 shorter 

 than the middle pair. 



This very distinct species is a true Antrostomua, agreeing very closely 

 with A. vociferus in size and proportions, but strikingly diiierent in 

 coloration. In the last mentioned respect it seems to come somewhat 

 near A. sericeo-caudaius Cass.,* sui)posed to come from South America 

 (Venezuela?), but the latter is much larger (length H instead of less 

 9.00, wing 7.25 instead of 6.00, tail 5.75 instead of 4.00), much paler or 

 more rufescent in color, and has the tail-bars exactly tbe reverse in 

 l)Osition, being \/-, instead of A^^baped. No oth' r species of the genus 

 a^ipear to resemble it at all closely. 



For the privilege of describing and naming this fine new species, I am 

 indebted to the courtesy of Senor Anastasio Alfaro, the accomplished 

 director of tbe Costa Rica National Museum. 



* Cf. Proc. Ac. Nat. Sci. Phila., iv, 1849, 238; Jour. Ac. Nat. Sci. Phila , ii, 1852, 

 121, PI. 12 



