SPHECOTYPUS.—SYNAMA. , 153 
spider the coxe of the four pairs are equally disposed throughout the whole sternal 
plate behind the caput. In Myrmecium, also, the abdominal plate runs completely 
round the fore extremity both above and beneath. 
Sphecotypus formicarius, sp. n. 
Adult female, length 7 lines. 
Cephalothorax black, densely marked with minute impressed punctures, and covered with fine, pale greyish, 
adpressed hairs, and a few long, fine, prominent ones; each segment is also clothed on the sides with 
more conspicuous white hairs. 
The four central eyes form a quadrangle, whose transverse is rather greater than its longitudinal diameter. 
The interval between the hind-centrals is much less than that between each and the hind-lateral eye next 
to it, and the interval between the fore-centrals is less than a diameter. 
The legs are deep rich brown, the tarsi yellow-brown ; those of the first pair have the coxe and femora con- 
spicuously striped with yellowish. 
The palpi are short, deep brown, the digital joint equal in length to the radial and cubital, densely clothed 
with coarse hairs, and devoid of a terminal claw. 
The maaille, labium, and sternum are deep blackish-brown. 
The abdomen is of a dull blackish hue, densely clothed with fine yellowish and white hairs or pubescence, tinged 
with yellowish on the upperside owing to the dull golden colour of the pubescence, and furnished thinly 
with longer hairs, some of which form a conspicuous white patch on each side below the constriction. 
The colour of the coriaceous plates above and below at the fore extremity of the abdomen is like that of 
the cephalothorax. The transverse ridges or folds on the posterior portion are each marked with a deep 
reddish-brown hue. The four outer spinners are short and of equal length, the inferior pair strongest, 
and immediately in front of them is a large, coriaceous, deep brown patch, thinly clothed with long, fine, 
whitish hairs, and with its hinder margin free and forming a curved lip in the middle, being no doubt 
the aperture to a spiracular organ. The genital aperture (placed on a rounded prominence at the hinder 
margin of the inferior coriaceous plate) is simple but characteristic. 
Hab. Panama, Bugaba in Chiriqui (Champion). 
Mr. Champion says :—‘ This spider is a perfect mimic of a large stinging ant, 
Ponera sp.” It would have been very interesting to have had some specimens of this. 
ant with the spider. 
SYNAEMA, Simon. 
Synema madida, sp. n. 
Adult male, length 14 line. 
Cephalothorax as broad as long, very nearly round, the lateral marginal impressions at the caput very slight. 
It is yellow-brown in colour, rather palest in the ocular region and on the clypeus, and with a narrow red- 
brown marginal line; glossy, with some minute granulations near the lateral margins ; about sixteen or 
eighteen long spine-like bristles are symmetrically disposed on the surface, five of them along the lower 
margin of the clypeus, which is considerably less in height than half the facial space. 
Eyes in the ordinary position, occupying the whole width of the fore part of the caput, and seated on different- 
sized greyish tubercles; the fore-laterals are largest, and on the strongest tubercles ; those of the posterior 
row are equidistant from each other; both rows are curved rather strongly, the anterior row rather the 
most curved, the convexity of the curves directed forwards; equal spaces also separate those of the 
anterior row. The four central eyes form a quadrangle broader than long and its fore-side shortest. 
The legs are long, moderately strong, 2-1, 4-3, furnished with strong hairs and numerous long strongish spines 
of varied length on all the joints excepting the tarsi. They are yellow in colour, the femora and genua of 
BIOL. CENTR.-AMER., Arachn. Aran., August 1899. xf 
