CATHARUS. 7 
 (Delattre*), Teleman (0. S. & F. D. G.8); Costa Rica, Tucurriqui (Arcé?®) ; 
Panama, Calovevora, Cordillera del Chucu (Arcé®). | 
This well-marked species is one of the older-known members of the genus, having 
been discovered near Jalapa by M. Sallé, whose specimens were described by Bona- 
parte!. Though of wide range, but few examples have come under our notice; nor 
did we ever actually meet with it ourselves in Guatemala, though one was secured for 
us by a native collector sent by us to explore the valley of the Polochic river. At no 
point of its range is it common, judging from the single specimens that have reached 
us in collections from various points. C. mexicanus can at once be recognized by its 
black head contrasting with the olive-brown back. In some specimens the cheeks and 
chest are nearly pure grey and the head deep black; in others these parts have an 
olivaceous tinge: the former we take to be male specimens, the latter female, though 
Arcé’s dissected skins are marked the reverse. 
9. Catharus dryas. (Tab. II. fig. 2.) 
Malacocichla dryas, Gould, P. Z. S. 1854, p. 285, t. 75"; Scl. & Salv. Ibis, 1859, p. 7°. 
Catharus dryas, Scl. P.Z.S. 1859, p. 824°; Salv. P. Z.S. 1866, p. 69°; Baird, Rev. Am. B. p. 10’. 
Malacocichla maculata, Scl. P. Z. 8. 1858, p. 64°. 
Catharus maculatus, Scl. P. Z. S. 1859, p. 8247; Cat. Am. B. p. 1°. 
Supra olivaceo-fuscus, pileo et capitis lateribus nigerrimis; subtus ochraceus, pectore toto fusco maculato ; rostro 
et pedibus flavis. Long. tota 7:0, ale 3-9, caudex 3:0, rostri a rictu 0°85, tarsi 1:35. (Descr. maris ex 
V. de Agua, Guatemala. Mus. nostr.) 
Hab. Guaremata (Skinner 1), Teleman (0.8. & F. D. G.°), Volcan de Agua above San 
Diego (0. S.).—Cotompra; Ecuapor °°; Botivia. 
We have hitherto considered the species described by Mr. Sclater as C. maculatus to be 
distinct from C. dryas; but the acquisition of additional specimens both from South and 
Central America has enabled us to make further comparison, with the result that we 
can no longer discriminate two species. It is true that freshly-killed specimens are as 
brightly coloured as Gould’s plate1; but experience has shown that the yellow of the 
under surface rapidly fades with exposure ; and this being the case, one of the chief dif- 
ferences relied upon fails to differentiate the two species. The difference of the colour 
of the back is sexual, females being more olivaceous than males. 
It is somewhat singular that in Central America this species has hitherto only been 
observed in Guatemala. Its presence in other parts doubtless remains to be discovered. 
For a long time we were accustomed to look upon C. dryas as one of the rarest of 
Guatemalan birds; and until Salvin’s last journey only three specimens had come under 
our notice. Two of these were from Vera Paz, one of them having been shot in the 
valley of the Rio Polochic near Teleman. The precise origin of the other, the type, 
now in the British Museum, is not known. 
