420 



NUKTII AMERICAN B.IKDS. 



In regard to tlie pareiituge of tliu e^'gs thus discovered, the coloration and 

 size of wliich cnnvs|Mind so closely with those of the Poor-will, Mr. Suhiii 

 writes, in ii letter (hited March 10, 1872 : " In respect to the Antroxtoinns 

 which lays white ej^'gs in (luateniala, 1 have carefully examined the skin of 

 the female sent to me with the eggs in question, and rej)rese'»ted as their 

 parent. It certainly is not A. nattalli, but appears to Indong to the spe- 

 cies descrilxid by Wagler as A. marwmi/sfiw. This s|>ecies is very closely 

 allied to A. vorifcnis, but apjHjars to be sutHciently distinct, inasnuich as 

 the rictal bristles are very long, the throat is almost without white feathers, 

 and the white on the tail is more limited in extent than in A. roci/irtts. 

 The true A. vot'ij'enm is fivquently found in winter in (Tuatemala, but is 

 probably only a migrant. The other species would certainly appear to be a 

 resident in South Mexico and Guatemala. With respect to A. niittalli, I 

 may add that I have recently acquired a skin from (luanajuata, in Mexico. 

 This is the first instance of the occurrence of the species in Mexico at all, 

 that I am aware of." 



Mr. Itidgway met with the Poor-will from the eastern slope of the Sierra 

 Nevada to the Wahsatch and Uintah Mountains. He describes its notes as 

 much like those of the eastern A. vocifcrus, except that the first syllable is 

 left off, the call sounding like simply poor-will, the accent on the last sylla- 

 ble. It frequents chieHy the dry mesa and foot-hills of the mountains, and 

 lives almost entirely on the ground, where its two white unspotted eggs are 

 deposited beneath some small scraggy sage-bush, without any sign of a nest 

 whatever. Both sexes incubate. 



Stemnm ( f Nyetibius jamaieensis. 



Stemnin of Chordeiles virginianus. 



Sternum of Caprimulgus xtietotnus. 



