192 Bulletin American Museum of Natural History. [Vol. XXXVI, 



(226) Crypturus soui modestus Cab. 

 Crypturvs modestus Cab., J. f. O., 1869, p. 212 (Costa Rica). 



A series of twelve males and eleven females indicates that this form 

 ranges from Nicaragua to western Ecuador. Ecuador specimens are 

 smaller (females average: Wing, 127 mm. as compared with 132 mm. in 

 Nicaragua examples), but I can discover no racial differences in color in 

 the twenty-three specimens listed below. Specimens from the Cauca and 

 Magdalena Valleys to which I have applied the name caucao, are interme- 

 diate between modestus and soui. The males resemble those of the former 

 while the females resemble those of the latter. 



A female collected by McLeannan and Galbraith on the line of the Pana- 

 ma R. R., and doubtless near or at Lion Hill, differs markedly in color 

 from any of the eleven females referred to above and obviously represents 

 C. s. panamensis Carriker (Ann. Car. Mus. VI, 1910, p. 379) described from 

 that locality. 



This bird has the breast and, to a lesser degree, abdominal region, deep, 

 clear ochraceous-orange as in females of soui, instead of ochraceous-tawny as 

 in modestus, the back rich hazel more as in some females of mustelinus, in- 

 stead of cinnamon-brown as in modestus, the crown browner less slaty than in 

 any of the females which I refer to modestus. Furthermore, the inner wing- 

 quills and wing-coverts are broadly margined with deep ochraceous-orange. 



A male taken by the same collectors, presumably at the same locality, 

 is more nearly like modestus below but has the back lighter and browner, 

 and the crown, as in the female, browner less slaty, than in modestus. I 

 should be inclined to attribute the brownish crown of these two (Lion Hill?) 

 specimens to fading, since both were collected about 1862, did not Car- 

 riker (Z. c.) in describing panamensis from recently collected material state 

 that the crown is without a grayish tinge. 



If these specimens are typical of the form occurring on the northern slopes 

 of the Isthmus, it seems probable that the bird which I refer to modestus is 

 restricted to the southern slopes. 



In addition to the Dabeiba female, the following specimens have been 

 examined: Nicaragua: Quilali, 1 cf; Chontales, 1 cf; San Juan, 1 9 ; Rio 

 Grande, 1 9 • Panama: Boqueron, 1 cf ; El Real, R. Tuyra, 2 cf cf , 2 9 9 ; 

 Boca de Cupe, 2 9 9. Ecuador:^ Esmeraldas, 3 cTcf, 3 9 9; Rio de 

 Oro, 2 cf cf ; Chone, 1 cf , 1 9 ; Naranjo, Guayas, 1 cf . 



Dabeiba, 1 9 . 



1 Doubtless the form described by Brabourne and Chubb from Vaqueria, northern Ecuador, as 

 Crypturas soui harUrli (Ann. & Mag. 1914 (8), XIV, p. 321). 



