44 ARANEIDEA. 
B. Tarsal claws three on all four pairs. Tarsi unisegmentate. Tarsi and 
protarsi i. and ii. without membranous appendages beneath. Sternum 
prolonged between the coxz of the fourth pair of legs, its apex soldered 
to the post-sternal plagula. axilla more elongate and more attenuate 
towards the apex . Caponina, E. Sim. 
CAPONINA. 
Caponina, E. Simon, P. Z. S. 1891, p. 578. 
Type C. testacea, E. Sim.: Antilles, St. Vincent. 
Eyes two only. Tarsal claws three. Tarsi not scopulate. Ungual tufts absent. Anterior protarsi flexuose, 
striate, furnished beneath with a double row of short stiff hairs. Mandibles with striations on the outer 
side. Femur of palpus with a small tooth on the inner side. 
1. Caponina sargi, sp. n. (Tab. III. figg. 6, 6 a-h, 2.) 
Type, 2, in coll. Godman & Salvin. 
Q. Total length 13 millim., carap. 4 millim. 
Carapace, sternum, mandibles, and legs orange-yellow. Abdomen grey. Eyes two, situate on black spots. 
Mandibles furnished with striations on the outer side, opposed to a small tooth on the inner side of the 
femur of the palpus. 
Hab. Guatemaa (Sarg). 
A single adult female and two immature specimens were found by Mr. Sarg. 
Fam. OONOPID, 
This family, instituted by M. Simon for the genus Oonops, Templ., and eighteen 
other genera, is distinguished from the Caponiide by the possession, in common with 
the Dysderidz, of two lung-sacs and two tracheal stigmata, the latter closely situated 
together on the genital rima. Lyes six, large, opaline, nearly always occupying the 
total width of the carapace. There are no stridulating-organs and no calamistrum or 
cribellum. 
DYSDERINA. 
Dysderina, E. Simon, P. Z.S. 1891, p. 556. 
Type D. principalis, Keys. 
Abdomen with dorsal and ventral scutum, not extending to the spinners. Posterior row of eyes straight. 
Tibize and protarsi i. and ii. armed beneath with a double series of long spines. Mandibles not striate 
on the outer side. Femur of palpus without stridulatory spine on the inner side. Tarsal claws two, 
with double series of teeth, set on a short onychium. Spinners six, colulus absent. 
1. Dysderina plena. (Tab. III. figg. 5, 5a, 2.) 
Dysderina plena, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran, i. pp. 143, 192, t. 17. figg. 7, 
7a-d (Q), t. 24. figg. 4, 4a-e (dy). 
Types, d 9, in coll. Godman & Salvin. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith 3). 
