176 MNIOTILTID^. 



reexamining the question, we believe that B. rufifrons is strictly confined in its range to 

 Mexico, and S. delattrii to Guatemala, B. mesochrysus appearing again in the more 

 southern parts of Central America. 



7. Basileuterus delattrii. • 



Basileuterus delattrii, Bp. Compt. Eend. xxxviii. p. 383, et Notes Orn. p. 63'; Scl. & Salv. Ibis, 



1860, p. 274 ^ ; Baird, Rev. Am. B. i. p. 249 \ 

 Basileuterus rufifrons, Salv. Ibis, ]866, p. 192*. 



B. rufifronti valde similis, sed abdomine toto flavo distinguendus. (Descr. maris ex Volcan de Agua, Guate- 

 mala. Mus. nostr.) 



Hob. Guatemala, Duenas^*, Volcan de Fuego, Volcan de Agua, Cohan 3, Lanquin, 

 Cahabon {0.S.& F. D. G.) ; Nicaragua [Delattre i)1. 



It is very doubtful if this species is found beyond the limits of Guatemala and, 

 perhaps, Nicaragua ; and we believe that all Mexican specimens attributed to B. delattrii 

 will prove to be somewhat immature examples of B. rufifrons, just as Guatemalan 

 birds called by the latter name are almost certainly of the present species. What we 

 take to be immature birds of both these species have the belly a yellowish white, which 

 in B. rufifrons becomes greyish white in the adult and in B. delattrii yellow, like the 

 throat. Regarding the occurrence of this species in Nicaragua some doubt must be 

 entertained, as it is very probable that Delattre's specimens described by Bonaparte as 

 from that country were really obtained in Guatemala. In Costa Rica the place of 

 B. delattrii is taken by the more southern form B. mesochrysus. 



In Guatemala we found this species in the forests of both volcanos, at elevations 

 ranging between 2500 and 5000 or 6000 feet, and in Vera Paz at several places in the 

 valley of the Cahabon river, between Cohan and Cahabon. Its habits are similar to 

 those of B. belli add B. culicivorus. Of its nidification nothing has yet been recorded. 



8. Basileuterus mesochrysus. 



Basileuterus mesochrysus, Scl. P. Z. S. 1860, p. 251'; Baird, Rev. Am. B. i. p. 250"; Salv. P. Z. S. 



1867, p. 136'; 1870, p. 183*; Lawr. Ann. Lye. N. Y. ix. p. 95'; v. Frantzius, J. f. Orn. 



1869, p. 294°; Salv. & Godm. Ibis, 1879, p. 117'. 

 Basileuterus delattrii, Cab. J. f. Orn. 1860, p. 325"; Lawr. Ann. Lye. N. Y. vii. p. 322' (nee 



Bonaparte) . 

 Basileuterus brunneiceps, Bp. Consp. i. p. 314" (nee d'Orbigny et Lafresnaye). 



B. delattrii valde affinis, sed nucha cinerea, stria riotali alba magis extensa forsan distingaendua. (Descr. 

 exempl. ex Paraiso, Panama. Mus. nostr. 



Edb. Costa Eica, San Jose {y. Frantzius % Guaitil and Grecia {Carmiol^), Irazu 

 {Rogers) ; Panama, Volcan de Chiriqui, Chitra *, Calobre * and Santa Fe ^ (ArcS), 

 line of railway {M'Leannan ®), Paraiso station (Hughes). — Colombia, Sierra Nevada 

 de Santa Marta '', Bogota ^ i°. 



