370 University cf California Publications in Zoology (Vou. 138 
Alcedinidae——Ceryle alcyon differs considerably from Coracias 
in structure of barbules of remiges. Distals of imner vane have 
long, slender, and conspicuous ventral cilia, and proximals of same 
vane have shorter pennula, this being only about one-half length of 
base. On distal half of barbs of outer vane, proximals (pl. 31, fig. 
79a) have very short, stumpy bases, and short pennula, the ventral 
barbicels exceedingly long and strong, in fact relatively larger and 
stronger than they have been found in any other birds. Distal 
barbules of back feathers also have long ventral cilia. Breast feath- 
ers unusual in having a series of slender ventral cila on proximal 
barbules (pl. 31, fig. 790). 
Upupidae—tirrisor viridis has no dorsal cilia whatever on distal 
barbules even on inner vane of remiges. Hooklets only 4 in num- 
ber, slender and well separated, ventral cilia well developed, the 
distal ones more conspicuous on account of the way they he (pl. 
31, fig. 88a). Distals of outer vane have the latter character even 
more conspicuous. Proximals of outer part of barbs of outer vane 
have short reduced base, and relatively long pennulum with a 
series of short weak unhooked ventral cilia (pl. 31, fig. 83b). Upupa 
indica is very similar to Irrisor in structure of feathers. 
Bucerotidae——Barbules of remiges considerably modified from 
type. In Hydrocorax mindanensis distal barbules of inner vane 
(pl. 31, fig. 82a) with very large base with ventral contour strongly 
sinuate, and ventral teeth relatively large. Pennulum very broad 
in lateral view in region of hooklets and of first 2 or 3 cells with cilia. 
Hooklets 4 or 5 in number, very large and heavy, but not elongate ; 
ventral cilia short, stout and blunt, the proximal ones the longer, 
but not showing when lateral aspect of base is in view on account 
of twist in pennulum; the more distal ones, however, are in lateral 
view, so that pennulum appears club-shaped (see plate 31, figures 
82a and c); dorsal cilia rudimentary except basal two, which are 
large and lobate. Distal barbules of outer vane (pl. 31, figs. 82c, d) 
very similar, but hooklets usually 6, dorsal cilia absent, and width 
of hooklet region very great, as shown by plate 19, figure 82d. 
Proximal barbules very long with relatively slender base, 4 or 5 
moderate, pointed ventral teeth, and broad pennulum, about half 
as long as base with backward-projecting rudimentary barbicels. 
Proximals of outer vane do not have barbicels even on outer part 
of barb, as shown by plate 31, fig. 82e. 
Anthracoceros and Lophoceros agree in important details with 
