212 VIREONID. 
tota 6°2, ale 3°1, caude 2°5, rostri a rictu 0°9, tarsi 0-9. (Descr. maris ex Coban, Guatemala. Mus. 
nostr. ) 
Femina mari similis, capite summo forsan magis ochraceo tincto. 
Hab. Mexico (Sallé*), Santa Cruz (Lafresnaye +), valley of Mexico (White *), temperate 
region of Vera Cruz (Sumichrast 1°), Mirador (Sartorius’), Jalapa? (de Oca *, Hoge), 
Guichicovi, Petapa (Swmichrast °), Merida in Yucatan (Salazar’, Schott §), Northern 
Yucatan (Gaumer); Guatemata® (Constancia®"), Volcan de Fuego, 7300 feet, 
Volcan de Agua above San Diego, Tactic, Coban, Choctum (0. 8S. & F. D. G.), 
This, the most northern representative of the genus Cyclorhis, is a common species in 
Southern Mexico and Guatemala, where it enjoys a considerable range in altitude, 
being found in Mexico abundantly throughout the temperate region as high as 4300 
feet ; so Prof. Sumichrast tells us!°. In Yucatan it is found almost at the sea-level. 
In Guatemala its range in altitude is still greater; for it occurred to us in the Volcan 
de Fuego at Calderas, an elevation of 7300 feet; and it is equally common in the low- 
lands of Vera Paz, which are not more than 1200 feet above the sea. 
Its usual resort is the outskirts of the forest or second-growth woods. 
In Costa Rica and Panama its place is taken by the next species. 
C. flaviventris was first described by Lafresnaye from Mexican specimens in his own 
collection. This is the only name that has been applied to it, excepting Lichtenstein’s 
undefined title Cyclorhis amaurophrys '*, which Bonaparte says refers to the same 
species 2. 
Judging from specimens the sex of which has been accurately determined, it would 
appear that the crown of the head in the male is purer slate-colour than in the female, 
which has this part tinged with ochreous. Prof. Baird has drawn attention’ to the varia- 
tion in the black spot at the base of the mandible in this species. We also find some 
differences. Mexican and Yucatan specimens all have this spot very distinctly marked. 
In those from Coban and Tactic it is also plainly shown, but not so in our examples 
from Choctum and Southern Guatemala. This feature seems here to be of less importance 
than in the case of some of the allied South-American species. 
2. Cyclorhis flavipectus. 
Cyclorhis flavipectus, Scl. P. Z. 8. 1858, p. 4481; Baird, Rev. Am. B. i. p. 889°; Scl. & Salv. 
Nomencl. Av. Neotr. p. 18°. 
Cyclorhis subflavescens, Cab. J. £. Orn. 1860, p. 405°; 1861, p. 93°; Baird, Rev. Am. B. i. p. 388°; 
Lawr. Ann. Lyc. N. Y. ix. p. 977; Salv. Ibis, 1869, p. 313°; P. Z. S. 1870, p. 184°; 
v. Frantz. J. f. Orn. 1869, p. 295 °°. 
Cyclorhis flaviventris, Lawr. Ann. Lyc. N. Y. ix. p. 97". 
C. flaviventri similis, sed ventre postico et crisso albis nec flavis distinguenda. 
Hab. Costa Rica (v. Frantzius*), Barranca ®, Dota Mountains ®7 (Carmiol), San José 
(v. Frantzius®"), Tucurriqui, Bebedero, Nicoya (Arcé), Irazu (Rogers); PANAMA, 
Volcan de Chirqui (Arcé®),—CoLomBia!?; Vennzueta! 3; TRiipap ! 2; AmAzontra®, 
