91 
the same length as the sixth. The first three secondaries are thick- 
stemmed and curved towards the body at a distance of about two- 
thirds of their length from the base. The fourth and fifth show 
this structure to a greater degree, with some corresponding alteration 
in the barbs on each side, as may be seen by comparing fig. a, re- 
presenting the upper surface of the fifth secondary of the male bird, 
with fig. d, which gives a similar view of that of the female. In the 
sixth and seventh secondaries of the male the terminal half of the 
rachis is thickened to an extraordinary degree, forming a solid horny 
lump. The external and internal barbs are also much modified in 
shape and generally curtailed in size. Fig. 6 gives an upper view of 
the sixth, and fig. c an under view of the seventh secondary. The 
corresponding feathers of the female, representing the normal struc- 
ture, are seen in fig. e and fig. f. In the eighth and ninth secon- 
daries the rachis is still rather thickened ; but the barbs (pogonia), 
instead of being reduced in size, are highly developed, particularly 
on the inner side. Mr. Fraser states that the wing-bones of these 
birds were also much thickened, no doubt in aid of this abnormal 
structure of the remiges. 
The same deviation from ordinary characters is observable in other 
species of the allied group Chiromacheris (e. g. in C. manacus, C. 
gutturosa, C. candai, &c.). 1 believe it is this structure which 
enables them to make the extraordinary noise for which they are 
noted. Buffon says that the Chiromacheris manacus is called La 
caisse-noisette in Cayenne ; and Mr. Salvin tells us (Ibis, 1860, p. 37) 
that OC. cand@i “begins with a sharp note, not unlike the crack of a 
whip.” But in no other species is the abnormal development carried 
to so great a degree as in the present. 
69. Masius CORONULATUS, sp. nov. 
Nigerrimus, plumarum menti parte basali cum plaga magna gut- 
turali, alis infra, et remigum rectricumque mediarum parte in- 
terna vivide luteis: capitis crista, erecta, elongata, pallide 
flava, hujus plumarum apicibus dilatatis et incrassatis, colore 
aurescenti-castaneo : rostro plumbeo, pedibus rubris. 
Long. tota 3°7, alze 2°3, caudz 1°7, tarsi 0°65. 
Hab. In rep. Equator. 
Mus. P.L.S. 
Nanegal, one ex. This Manakin is a close ally of Masius chry- 
sopterus of New Granada ; but may be readily distinguished by its 
crest, which is of a paler yellow and terminated with pale golden red, 
the feathers being thickened and flattened at the extremity into a 
horny substance, something like that on the wings of the Wax-wing 
Chatterer. One example occurred in Mr. Fraser’s former collection 
from Nanegal without any note attached. 
70. RupicoLa SANGUINOLENTA, Gould, P. Z. S. 1859, p. 100. 
Nanegal, two ex. This is the Transandean representative of R. 
peruviana, as Cephalopterus penduliger is of C. ornatus. 
