342 MR, P. L. SCLATER ON CYANOMYIAS C@mLeEstis. [Apr. 4, 
terminal postabdominal segment is shorter than in C. subterranea, 
not as long as its greatest width. Length about 3 inches 10 lines 
(98 mm.) ; of the larger chelipede, from the base of the merus joint 
to end of the dactylus, about 2 inches 10 lines (72 mm.). 
From the American C. californiensis and C. uncinata, this species 
is distinguished by the much longer palm of the larger chelipede, 
and the much broader, less prominent, denticulated basal lobe of the 
arm or merus. 
EXPLANATION OF PLATE XX. 
Fig. 1. Nawxia (Naxioides) robillardi (p. 339), adult male, reduced to about 
half natural size. 
la. Lateral view of the carapace of the same in outline, showing the 
elevation of the dorsal spines, reduced about half natural size. 
1). Antennal, orbital, and buccal regions of the same, viewed from 
below, natural size. 
le. Postabdomen of the same, natural size. 
April 4, 1882. 
Professor Flower, LL.D., F.R.S., President, in the Chair. 
Mr. Sclater exhibited what appeared to be an adult male example 
of Cyanomyias colestis (Sharpe, Cat. Birds, iv. p. 278), which 
belonged to the Museum of Zurich, and had been sent to him for 
determination by Dr. Moesch, of that city. Mr. Sclater remarked on 
the more brilliant colours and finely developed crest of the male of 
this species, which rendered it readily distinguishable from the 
female example (figured by Lord Tweeddale, P. Z.S. 1878, pl. vii. 
Head of Cyanomyias celestis 3. 
fig. 1), the only specimen hitherto known of this superb Fly- 
catcher. The present example was received from Manilla, but was 
probably originally from Dinagat, as the type specimen, now in the 
collection of Mr. Wardlaw Ramsay, had been procured in that 
island. Besides the highly developed crest and more brilliant 
