OXYOPEIDON. 347 
1. Central posterior cavity elongate-oval, or pointed posteriorly ; its 
broad chitinous boundaries, slightly sinuous at the sides, some- 
what bilobate in the centre posteriorly, trianguliform, anteriorly 
embedded in a deep, black, chitinous cavity on each side, the 
central cavity appearing of a pale yellow colour . . . . . flebile, O. P.-Cambr. 
2. Central posterior cavity semicircular, its chitinous boundaries 
regularly semicircular, not bilobate behind, and the lateral 
we . letum, O. P.-Cambr. 
cavities absent or only very slightly indicated on bfacile, O. P.-Cambr. 
B. Vulval area without any tongue or central posterior depression, simply 
an oval, elongate, shallow cavity, thickly clothed with white scales, 
the margins forming a narrow chitinous rim, slightly emarginate 
Jaterall d . orly in th molestum, O. P.-Cambr. 
aterally and prominent posteriorly in the centre. . . . . . , difficile, O. P.-Cambr. 
Nots.—The scales are in most cases rubbed off, so that the characters (probably very good ones) which 
might be drawn from the pattern and coloration are not available. I am unable to separate satisfactorily 
O. letum from O. subfacile, or O. molestum from O. difficile; but it is not possible to arrive at any definite 
conclusion without further material. 
1. Oxyopeidon putum, (Tab. XXXII. figg. 30, 30a, 4, 3; 31, 314, 2.) 
Oxyopeidon putum, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 140, t. 16. figg. 7 
7a-e(¢), 8, 8a-c ( 2)". 
Type ¢, gynetype 2, in coll. Godman & Salvin. Total length, ¢ 5°75, 9 7 millim. 
Hab. Panama, Bugaba (Champion 1). 
] 
The vulva of the female in this species varies slightly in appearance in examples of 
different degrees of maturity, but is otherwise quite characteristic and constant. ‘The 
male can be recognized by the form of the tibial process of the palpus, there being a 
characteristic sharp spur set at right angles to the segment on the outer side, with a 
broader bifid lamina further forward near the base of the tarsus, the tibia itself being 
concave on the outer side. 
2. Oxyopeidon flebile. (Tab. XXXII. fig. 32, 2.) 
Oxyopeidon flebile, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 141, t. 16. figg. 9, 
9a-c (2)’. . 
Type d, gynetype 2, in coll. Godman & Salvin. Total length, ¢ 6, ¢ 9 millim. 
Hab. Panama, Bugaba (Champion 1). 
8. Oxyopeidon letum. (Tab. XXXII. fig. 33, 9.) 
Oxyopeidon letum, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 142, t. 16. fige. 10, 
10 a-c (¢)’. 
Type, 2, in coll. Godman & Salvin. Total length 5°75 millim. 
Hab. Mexico, Dos Caminos in Guerrero (H. H. Sinith +). 
