Mr. R. Ridgway on three Guatemalan Birds. 43 



AQUILA CHRYSAETUS. 



The skin sent (No. P 7) from Yokohama is a young bird 

 of this species. 



AQUILA LAGOPUS. 



The skins sent (Nos. 2666 and 1371) from Hakodadi are 

 Rough-legged Buzzard Eagles. 



CIRCUS SPILONOTUS. 



The skin sent (No. 1491) from Hakodadi appears to be a 

 young male of this species. The thighs are white streaked 

 with chestnut ; the primary-coverts and the secondaries are 

 very grey ; and there are obscure bars on all the tail-feathers, 

 except the two centre ones. Another skin (P 8) from the 

 main island appears to be a female in first plumage. The 

 thighs are dark chestnut-brown, but all the tail-feathers are 

 barred. 



ClRCUS jERUGINOSUS. 



Three examples from the main island of Japan are Common 

 Marsh-Harriers, with almost white heads, unbarred tails, and 

 dark chestnut thighs. 



V. Notes on three Guatemalan Birds. 

 By ROBERT RIDGWAY. 



HAVING, through the kindness of Mr. Salvin, had the oppor- 

 tunity of examining the type specimens of the following 

 species, it affords me much pleasure to offer a few remarks 

 concerning them, my apology for doing so being that they 

 possess peculiar interest to me on account of their relation- 

 ship, real or supposed, to certain North-American forms 

 with which I have been enabled to make a careful comparison 

 of them. 



1. CHRYSOMITRIS ATRICEPS, Salvin, P. Z. S. May 1863, 

 p. 190; Ibis, 1866, p. 194. 



This very distinct species is apparently most nearly related 

 to C. spinescens, Bp., of New Granada. The coloration is 

 very similar, but the olive-green tips to the greater wing- 

 coverts and margins of the tertials are much broader, and the 



