CYCLOSA.—ARGIOPE. 51 
The abdomen is long-oval or somewhat subcylindric in form, the hinder extremity produced in an obtuse 
caudiform shape over the spinners. The upper part and sides appear to cover or overlap the underside, 
roof-fashion, though this appearance may only be due to contraction in the process of preservation in spirit 
of wine; from the same cause, perhaps, may also arise a strong contraction across the middle of the 
abdomen, though I think this latter is normal. The colour is yellow-brown, marked above and on the 
sides with black, and with some yellowish or white spots above on the anterior half, and one at the 
posterior extremity on the upperside. The underside and spinners are black, the latter strong, short, 
and compact. 
Hab. GUATEMALA, between Chichochoc and Coban (Sarg); Panama, Bugaba 
(Champion). 
This spider is nearly allied to Epeira tauricornis, though easily distinguishable from it 
by the absence of tubercular prominences and spines on the abdomen. 
Cyclosa index, sp. n. 
Adult female, length to base of posterior prominence 14, to extremity of the same 2} lines. 
Allied to C. conzca, Pall., but differs in the form of the abdomen, and in the size, shape, and position of its 
posterior production. 
The abdomen is nearly globular, and projects greatly over the thorax; on each side above, at the fore extremity, 
are two conical eminences, their height equal to their breadth at the base; and from the middle of the 
hinder extremity is another much longer eminence, tapering, and equal in length to the interval between 
its base and the fore extremity of the abdomen on the upperside, and the spinners on its underside ; 
this eminence is directed backwards, and rather upwards, at right angles toa line drawn from the spinners 
to the anterior side of the fore eminences. The posterior eminence gives the abdomen the shape of a 
peg-top. Its colours are a variegated mixture of dark black-brown, brown, yellow-brown, white, and 
cream-yellow, with a somewhat dagger-shaped yellowish marking along the middle of the upperside ; the 
blade of the dagger-shaped marking is rather dentate along its edges, and its point dilates into a yellow 
spot or blotch at the base of the hinder prominence, and on each side of the dagger-blade is a largish 
irregular black marking. Genital process small, but characteristic in form, and directed backwards. 
The cephalothorax is dark yellow-brown. 
Legs pale yellow, 1,4, 2,3; the fore extremity of the femora, and the genua of the first and second pairs, 
dark brown; with a few other irregular markings of the same hue on the other joints and legs ; furnished 
with hairs, but no spines, or at any rate very slender ones. 
Palpi yellow. 
Falces, maxille, and labium yellow-brown, the maxille and the labium paler at their extremities. 
Sternum blackish, surrounded by a marginal row of very distinct cream-yellow tubercles opposite the point of 
insertion of the legs. 
Across the middle of the underside of the abdomen, between the spinners and the genital aperture, is a trans- 
verse raised ridge marked with white irregular spots on a black ground. 
Hab. GuatemaLa, Tamahu (Sarg). 
A single example. 
ARGIOPE, Audouin ex Savigny. 
Argiope trivittata, sp. n. 
Adult female, length 34 lines; adult male, 2} lines. 
2. Cephalothorax yellow, tinged with orange, marked with a longitudinal central and lateral dark yellow- 
brown bands. The lateral band on each side is marginal and the broadest, and does not reach further 
forwards than the marginal indentation ; the central one reaching to the ocular area. 
Eyes all black and rather small; the four centrals are equal in size and form a square, whose anterior side is 
HT 2 
