ARGYROEPEIRA. 5 
This spider is closely allied to A. hortorum, Hentz, but may be distinguished by the 
form of hinder part of the abdomen, this part in A. hortorwm when looked at in profile 
always projecting perceptibly over the spinners, while in A. zdonea it is simply vertical, 
the markings in A. hortorum being also more vivid; there is a good deal of a greenish- 
yellow tinge on the silvery parts, and the darker portions are much intensified in hue 
at the hinder extremity, being quite black in some examples. ‘The underside also 
has a very distinct V-shaped silvery marking towards the spinners, the space enclosed 
being quite black. There is also a difference in the form of the genital aperture in 
the two species. In other respects, both in colours and in the general character of the 
markings, they are very similar. 
Seven examples were captured by Mr. Champion in Chiriqui. 
Argyroepeira acuminata, sp. n. 
Adult female, length 43 lines. 
In general appearance, colours, and markings this spider closely resembles A. cdonea and A. hortorum, 
It may be easily distinguished from the former by the more protuberant form of the anterior portion 
of the abdomen, and the rather considerable prolongation of the slightly tapering posterior extremity 
over the spinners; the oblique dashes of sooty-grey, which divide the two longitudinal central silvery 
stripes on the upperside of the abdomen, are in the present species mere slender lines, and the 
silvery stripes on the sides are more distinctly defined; the silvery markings also, generally, are often 
much suffused with reddish-golden and greenish-yellow hues, and the underside has simply a narrow 
silvery edging or line. Most of these characters will also serve to distinguish A. acuminata from A. hor- 
torwm, in which the hinder part of the abdomen is much less prolonged, but more distinctly marked 
with black. The genital process and aperture are of characteristic form. 
Hab. Panama, Bugaba, Tolé (Champion). 
Several examples. These are on an average rather larger than the usual run of the 
specimens I have of A. hortorum, Hentz; but a difference of size can scarcely be relied 
upon asa specific character, except as the result of a comparison of a large series of 
specimens. 
Argyroepeira debilis, sp. n. 
Adult female, length 2 lines. 
Cephalothorax short, but otherwise of ordinary form, and together with the falces, maxille, labium, and palpi 
of a pale yellowish hue. The colour of the legs is yellow-brown, and the sternum is of a deeper hue. 
The eyes are on black spots, and in the usual position, but more closely grouped than in some other species, 
the interval between those of the hind central pair being a little greater than that between each and 
the hind lateral eye next to it; in another example, however (not adult), the interval seems less, but 
as the example appears to have been when captured just about to moult, it is possible that the apparent 
position of the eyes is not the correct one, otherwise it would point to a specific difference in the two 
spiders. The height of the clypeus is less than the diameter of one of the fore central eyes. 
Falces moderate in length, prominent towards their base in front, and a little divergent towards the extremities. 
Legs. These appear to have been moderately long, but as they were greatly damaged, their actual length could 
not be ascertained; relative length, 1, 2, 4, 3. 
Mawille long, enlarged and rounded and divergent at their extremity. 
Labium somewhat rounded at the apex, half the length of the maxille, and strongly impressed transversely a 
little below the apex. 
