Mr. A. G. Butler on new Species of Coerostris. 103 
the dorsal surface behind the caput, the latter twice as broad 
as long, clothed with short golden yellowish pilosity ; oculi- 
ferous tubercles very prominent, the central one forming a 
short trapezium, a little broader than long, the eyes upon it 
rather small and about equal in size, black ; lateral tubercles, 
as in the male, scarcely oblique, with the anterior eye decidedly 
larger than the posterior; one tubercle on each side and two 
mammoid tubercles, as in the male, upon the posterior margin, 
all black-tipped. Abdomen testaceous, pyriform, but enor- 
mously developed forwards, so as to conceal the anterior mar- 
gin when looked at from above; anterior surface ornamented 
from the lateral margins of the central protuberance by a 
longitudinal whitish stripe, and in front of the protuberance by 
a Y-shaped marking of the same colour; the anterior margin 
runs over the front of this protuberance (which is very long 
and pyramidal), and which thus bears three out of eight small 
conical tubercles which bound the margin; on each side of, 
and a little behind, the central protuberance is a shorter and 
incurved one bearing on its outer edge two short bat ill- 
defined tubercles, which widen its base; lateral and posterior 
surfaces concentrically plicate; ventral surface nearly flat, 
dark brown, with the margins and a pentagonal scutiform 
patch behind the epigyne (and dotted with six black dots in 
converging series of three each) ochreous. Legs castaneous 
with paler bands, flattened and clothed with fulvous bristles 
above, cylindrical, with more or less yellow tarsi below, rela- 
tive length 1, 2, 4, 3; palpi castaneous, densely clothed with 
tulvous bristles, flattened, terminating in a short fine spine- 
like point; falces reddish castaneous, with the culm and 
movable claw blackish; teeth very small, four on each side ; 
maxille and labium: olivaceous, with yellowish anterior bor- 
ders; coxz olivaceous ; pectoral shield pentagonal, piceous. 
Length (including cephalothorax) 93 millim., height of anterior 
central abdominal protuberance from posterior margin of 
caput 7 millim., from its anterior base 3 millim. 
Central Madagascar. 
A second male differs somewhat in form and very much in 
coloration, so that at present I hesitate to regard it as a 
variety of this species. C. ecclestigera is evidently allied to 
C. Wahlbergit from Caffraria, yet exhibits too many discre- 
pancies from Dr. Thorell’s description to permit its identifi- 
cation with that species. It is also allied to O. Petersii of 
Karsch, though by no means so specialized a form as the 
latter. 
4. Cerostris Cowant, sp.n. (Pl. VI. figs. 4, 4 a.) 
¢ . Cephalothorax dark mahogany-red, but with the caput 
