Hans von Berlepsch on the Genus Cyclorhis. 85 



fact, I can hardly conceive any difference between Ridgway's 

 description of C. insularis and the latter species. 



In the Rev. Am. Birds, i. p. 387, Prof. Baird alludes to 

 certain skins of C. flaviventris from Guatemala, which lack 

 the black of the lower jaw. I have a similar specimen from 

 Vera Paz, which has the basal half of the under mandible 

 reddish brown like that of the upper, and shows no traces of 

 a plumbeous spot. The bill, further, is much shorter and 

 more feeble than in a specimen from Mexico, the super- 

 ciliary stripe much paler, the pileum much suffused with 

 brownish, and the olive of the back much darker ; wings and 

 tail shorter. I am by no means satisfied that this is simply 

 the young of C. flaviveyitris . But from Prof. Baird's and 

 Mr. O. Salvin^s remarks it appears that both forms are to be 

 found together in Guatemala. Prof. Cabanis has also men- 

 tioned a specimen of C. flavipectus with uniform reddish 

 under mandible. 



-4-2. Cyclorhis flavipectus, Scl. 



As Mr. Sclater remarks, specimens from Costa Rica and 

 Veragua are perhaps separable as a subspecies, C. flavipectus 

 subflavescens (Cab.). But the points of distinction urged by 

 Prof. Cabanis do not hold good. The yellow of the under- 

 parts in the northern form is not more extended, but eveu 

 sometimes more restricted, paler and more greenish than in 

 typical specimens from the south. Nevertheless the northern 

 bird may be distinguished by the paler greyish olive of the 

 upper parts, the paler rufous superciliary stripe, and darker 

 ashy sides of head and chin, and perhaps by the slightly 

 larger dimensions. 



Specimens of C, flavipectus from Bogota generally show a 

 much purer and deeper golden yellow on the underparts 

 than those from Venezuela and Trinidad. 



-/-3. Cyclorhis virenticeps, Scl. 

 + 4i. Cyclorhis coNTRERASi, Tacz. 



I have nothing to add to Mr. Sclatcr's account of these 

 species. 



