440 ARANEIDEA. 
a'. The two lateral stripes not clear, but filled up with golden 
scales . . .- < Ls . aurostriata. 
6’. The two lateral stripes clea, not filled up with metallic 
pigment. 
a?. Vulval orifice limited anteriorly by a transverse semicircular 
chitinous margin. Abdomen less prominent behind. 
a. The anterior margin of the vulval cavity without a pro- 
minent angle in the centre. 
1. The central tongue of the vulva broader anteriorly. 
a‘. The central tongue of the vulva four times broader 
anteriorly than at the posterior margin venusta. 
f argentea, Keyserl. 
b*. The central tongue only slightly broader anteriorly . mandibulata. 
2. The central tongue of the vulva much narrower ante- 
riorly, exhibiting posteriorly a transverse hammer- 
head plate. . . . oe ee ew we ee fragilis, O. P.-Cambr. 
. The anterior margin of the vulval cavity with a promi- 
nent angle in the centre. . . . to. ew wee tdonea, O. P.-Cambr. 
b?. Vulval orifice not limited anteriorly by a semicircular 
transverse margin. Abdomen very prominent behind . . acuminata, O. P.-Cambr. 
b. Abdomen without lateral stripes or bands . . . . . simplex, sp. n. 
B. Abdomen not striped longitudinally, simply variegated with blotches 
and slashes, or sometimes almost unicolorous. 
a’. Abdomen produced behind above the spinners into a very con- 
spicuous, long, rounded tubercle . . .. . Lo lugens, O. P.-Cambr. 
b°. Abdomen not produced behind to form a definite tubercle. 
a’. Carapace yellow. Abdomen richly variegated with orange, 
silver, and black. Vulva larger, central tongue straight 
along its posteriormargin . . . . MOrens. 
°, Carapace black. Abdomen almost entirely black, with dull 
white spots and blotches. Vulva smaller, central tongue 
produced in the centre of the posterior margin . . . . . mesomelas, O. P.-Cambr. 
Nors.—The females of species belonging to this genus ate very difficult to separate, and the characters given 
above must not be taken too literally. The type of L. curta (O. P.-Cambr.) is not fully mature, and the 
specimen being much worn and the legs absent, the species cannot be included in the Table. I cannot at 
present distinguish L. argentea (Keyserl.) from L. venusta (Walck.), and more males of the former from 
Colombia are required before one can decide. LZ. maura (Banks) is unknown to me. 
1. Leucauge mandibulata, sp.n. (Tab. XLI. figg. 17, 17 a-c, ¢; 18, 2.) 
Type 3, gynetype 2, in coll. Godman & Salvin. Total length, ¢ 5, 9 10 millim. 
Hab. Muxtico, Teapa in Tabasco (H. H. Smith). 
This fine species closely resembles other large members of the group, but may be 
distinguished by the characters given in the Table. The coloration of different 
examples varies so much that it is useless to describe it minutely. 
