426 Miller, Genera of Ceryline Kingfishers. I July 



amazona is quite different from that of the smaller species of the 

 genus, much more resembling that of Megaceryle alcyon and M. 

 torquata. 



In my 'Revision' I quoted from 'P. Chalmers Mitchell's paper 

 on the 'Anatomy of the Kingfishers' (Ibis, 1901, 120) regarding 

 the deep plantar tendons of Megaceryle and Chloroceryle. Mr. 

 Mitchell's description and figures show a striking difference 

 between these two genera in the arrangement of the tendons. 

 Of Megaceryle he described M. maxima and M. alcyon; of Chloro- 

 ceryle, C. americana and C. inda. I have examined M. alcyon, 

 C. americana, C. inda, C. amazona and Ceryle varia. My dissec- 

 tion of M. alcyon agrees essentially with that of Mitchell. On 

 the other hand, my diagrams of the tendons of Chloroceryle ameri- 

 cana and C. inda differ in important respects from Mitchell's 

 figures of these species. They, as well as C. amazona, and Ceryle 

 varid, all agree essentially with each other and differ from Mit- 

 chell's figure of M. alcyon only in the position of the branch to 

 the hallux. In Megaceryle the flexor perforans digitorum divides 

 almost simultaneously into four branches, one for each toe, while 

 in the other genera the slip for the hallux leaves the main tendon 

 decidedly above the point where the tendon divides to supply 

 the anterior toes. My dissections were made with great care, 

 knowing that they did not agree with Mitchell's results, and a 

 second specimen of C. americana was examined as a check upon 

 the first; I therefore feel confident that the above statements 

 are correct. 



The following key shows the main differences, both internal 

 and external, not only between the genera of the Cerylinae but 

 also between the more marked groups of species. 



a Diastataxic; acrotarsuim scutellate; anterior toes shorter; upper parts 

 not green; sexes alike in color of axillars; maxillary bone abruptly 

 and somewhat more broadly expanded. 

 b A conspicuous vertical crest; bill stouter, its rami not overlapt by 

 interramal plumage, the tomia more or less distinctly ser- 

 rate; tarsus and hallux shorter and stouter; tail more round- 

 ed, rectrices not widened terminally, somewhat pointed; 

 plumage rather harsh and lusterless, partly blue-gray and 

 rufus, with no large white areas in scapulars, secondaries, 

 outer webs of primaries, nor tail; larger (wing more than 



