1882.] MR. A. G. BUTLER ON SPIDERS FROM MADAGASCAR. 763 
10. On some new or little-known Spiders from Madagascar. 
By Arruur G. Butisr, F.L.S., F.Z.S., &c., Assistant 
Keeper of the Zoological Department, British Museum. 
[Received December 5, 1882.] 
(Plate LVII.) 
In a large collection of Arachnida made by the Rev. Deans 
Cowan in Madagascar I found a few specimens of very great interest; 
amongst these the species of the remarkable genus Cerostris have 
already formed the subject of a paper in the ‘ Annals and Magazine 
of Natural History’ for August last. In addition to many other 
singular forms were specimens of the curious tailed species Arach- 
noura scorpionoides of Vinson, from Central Madagascar and the 
Betsileo country, of the beautifully coloured Peucetia lucasit from 
the east coast, of Latrodectus geometricus, two examples of the ex- 
traordinary Erauchenus workmanni of Cambridge, a specimen of the 
equally bizarre Augusta papilionacea of the same author, and, last 
but not least, four specimens of his beautiful Phoroncidia aurata (to 
which last I shall have occasion to refer later on). 
THERIDIID&. 
Curysso, O. P. Cambridge. 
This genus was founded in the present year (P. Z.S. 1882, p. 429), 
for the reception of two small Spiders from the Amazons and Ceylon. 
I now have to add two more from Madagascar. 
1. CHRyYSsO CORDIFORMIS, sp.n. (Plate LVII. fig. 2.) 
Q. Falces, maxillz, labium, sternum, and legs of a clear pale 
yellow colour; the cephalothorax above black, with pale yellow 
margins ; abdomen above black, ornamented with four large trans- 
verse pyriform snow-white spots, two in front and two at the back ; 
ventral surface dark chocolate-brown, 
Cephalothorax oblong, rather narrow, slightly expanded towards 
the back ; caput projecting in front of the eyes, in the middle, and 
with a slight indentation in the centre of its anterior margin, which 
is represented by the base of the falces: lateral eyes small, placed 
longitudinally at the side of the head, of equal size; the anterior 
pair forming a nearly straight (slightly concave) line with the ante- 
rior pair of central eyes ; the latter are twice as large as the lateral 
eyes and are nearer together than the posterior central pair; the 
posterior central eyes are larger than the lateral ones, and are sepa- 
rated from the anterior central pair by a slightly wider interval than 
from one another ; the eyes of the central oculiferous area therefore 
form an unequal square, the lateral and central posterior eyes forming 
a nearly straight line: abdomen convex, cordiform, pointed behind ; 
legs cylindrical, sparsely setose, 1, 4,2, 3. Entire length 2 millim. 
Two examples: Central Madagascar. 
