INSESSORES. 

 Atlas, Ornithology, Plate XIII, fig. 1. Adult. 



189 



The specimens of this remarkable little species vary somewhat in 

 size, but are undoubtedly this species. The larger, however, approach 

 in some degree the preceding, and by descriptions only are difficult to 

 be characterized so as to be readily distinguished. The present bird 

 is the smaller, and is one of the smallest species of this family. 



According to Mr. Peale, this bird was " found in considerable num- 

 bers near Callao, Peru, in the month of July. It was always on the 

 ground during the day, and never uttered any sound when flushed." 



Our figure above cited is of the natural size. 



3. Genus CHORDEILES, Swainson, Faun. Bor. Am. II, p. 466 (1831). 

 1. Chordeiles acutipennis [Boddaert). 



Caprimulgus acutipennis, BoDD. Tab. PL Enl. p. 4G (1783). 

 Caprimulgus acutus, Gmelin, Syst. Nat, II, p. 1031 (1788). 

 Caprimulgus exilis, Lesson, Rev. Zool. 1839, p. 44. 

 Chordeiles laheculatiis, Jardine, Ann. & Mag. Nat. Hist. 1846, p. 118. 

 ^^Caprimulgus semitorquatus, Linn. Gm. Pr. Max." — Tschudi, Fauna Peruana, Orn, 

 p. 21. 



Caprimulgus pruinosus, TsCHUDi, Av. Consp. p. 8. 



Chordeiles peruvianus, Peale, Zool. U. S. Exp. Exp. Birds, p. 172 (1848).* 



white ; wings dark brown ; the first four quills crossed by an oblique white line, which is 

 edged with rufous; secondaries with irregular bars of dark rufous; coverts, with a termi- 

 nal spot of pale tawny, margined with dark brown; tail even or 'square ;' four central 

 feathers gray, crossed by seven irregular bars of dark brown ; the rest dark brown ; the 

 inner webs tipped with white, and crossed by three bars of tawny near the body; outer 

 web with eight or ten narrow, equidistant bars of pale rufous ; tarsi covered with feathers 

 reaching to the toes; irides brown. 



"Total length, eight and three-tenths inches; wing, from the carpal joint, five and 

 three-tenths inches; tail, four inches; tarsi, thirteen-twentieths of an inch; middle toe, 

 including the nail, seventeen-twentieths of an inch ; nail, three-twentieths of an inch : 

 hind toe, two-tenths of an inch ; nail, one-twentieth of an inch ; bill, four-tenths of an 

 inch ; to the angle of the mouth, one and two-tenths inches." 



* " Head, back, scapulars, and two middle tail-feathers, light gray, mixed with tawny; 

 sagittal spot, on the upper part of the throat, white ; beneath it, tawny, mottled with 

 dusky; breast gray, finely mottled; belly, vent, and under tail-coverts pale tawny, with 

 dusky bars; wings dusky black ; the first four quills crossed at the middle by a white bar; 

 second quill rather longer than the first; the third is shorter; tail notched, dusky; a 



