102 Mr. A. G. Butler on new Species of Coerostris. 
with two series of four teeth along the anterior margins, the 
fourth at the angle slightly largest; maxille and labium 
blackish, with yellowish anterior borders; pectoral shield ob- 
tusely pentagonal, castaneous ; coxee and femora below casta- 
neous. Length (including cephalothorax) 16 millim., of 
reflexed abdominal protuberances 7 millim. 
East coast of Madagascar. 
This singular species seems to me to approach C. Keyser. 
lingit in structure ; it is also somewhat allied to C. avernalis. 
3. Cerostris ecclestigera, sp. n. 
(Pl. VI. figs. 1-1¢ & 2-2c.) 
g. Cephalothorax nearly square, castaneous, slightly ex- 
panded and obliquely depressed behind the caput; the latter 
twice as broad as long, densely clothed with appressed. seri- 
ceous whitish puilosity ; oculiferous tubercles very prominent, 
the central one forming a short trapezium a little broader than 
long; eyes rather small, black; lateral tubercles less promi- 
nent than the central one, slightly oblique, the eyes smaller ; 
two prominent tubercles on the posterior margin of the caput, 
separated from each other by the central sutural impression 
-and a little wider apart at their apices than the posterior cen- 
tral pair of eyes. Abdomen testaceous, pyriform, with longi- 
tudinally and transversely plicate anterior and concentrically 
plicate lateral and posterior surfaces ; ascending towards the 
front, where it is crowned by a broad central conical tubercle, 
preceded on the anterior margin by two short tubercles; 
a rather short conical tubercle (considerably shorter than the 
central one) on each side and a little behind the central one ; 
ventral surface nearly flat, greyish, with a brown spot in the 
region of the spinnerets. Legs castaneous, barred with whitish 
above, but the tarsi yellowish below, the upper surface flat- 
tened, longitudinally grooved, clothed with short whitish pilo- 
sity, below cylindrical, relative length 1, 2,4, 35; palpi yel- 
low, rather short, cylindrical, with enormous pyritorm bulb, 
slightly convex and setose on the upper surface, inarched, but 
with an obtuse convex keel on the under surface; a small 
bead-like blackish pustule at the apex of the inferior margin, 
which is the true termination of the bulb; falces pale casta- 
neous, the movable claw reddish with blackish base, the 
teeth I cannot determine; maxille, labium, and coxe pale 
olivaceous ; pectoral shield pentagonal, with a central patch of 
white hairs, but otherwise dark castaneous. Length (including 
cephalothorax) 54 millim. 
?. Cephalothorax nearly square, castaneous, slightly ex- 
panded and arched at the sides, and obliquely depressed on 
