396 ARANEIDEA. 
resemblance to some species of the latter being due to the conical shape of the abdomen 
and the silvery pearl-like scales with which they are spangled. The colulus is present, 
very minute, but furnished at its apex with a pair of fine bristles; while the tarsal 
comb on the fourth pair of legs is also strongly in evidence. 
1. Thwaitesia affinis. (Tab. XXXVII. figg. 18, ¢; 19, 19a, ¢.) 
Thwaitesia affinis, O. P.-Cambr. P. Z. S. 1882, p. 431, t. 31. fig. 8@'; Biol. Centr.-Amer., Arachn. 
Aran. i. p. 196, t. 25. figg. 2, 2a, 6 (2), 8, 8a-d (s)”. 7 
Type, 2, in coll. O. P.-Cambridge; androtype, ¢, in coll. Godman & Salvin. Total length, 9 4, ¢ 3 millim. 
Hab. Panama, Bugaba (Champion ?).—Sourn America, Amazons}. 
EURYOPIS. 
Euryopis, Menge, Preuss. Spinn. p. 174 (1868). 
Type LE. flavomaculata (C. L. Koch). Europe. 
Eyes of posterior row subequal, forming a slightly recurved line; anterior row feebly procurved, centrals 
a little larger and further from each other than from the laterals. Clypeus higher than the central 
ocular quadrangle. Tarsal comb present beneath tarsus iv. Colulus present, but very minute. Sternum 
acuminate posteriorly. 
The species occurring in Central America may be recognized as follows :— 
Males. 
a. Bulb of palpus with two long stout spines at its apex. . . . lineatipes, O. P.-Cambr. 
6. Bulb of palpus with a single, short, slightly falciform spur at its apex. spinigera, O. P.-Cambr. 
Females. 
A. Vulva presenting a plain circular cavity, with a narrow chitinous 
margin posteriorly. No discs representing the position of the 
spermathece visible . . . . . . 1... oo . . lineatipes. 
B. Vulva presenting a more or less transverse cavity, with a pair of discs 
representing the position of the spermathece. 
a. Vulva presenting a broad transverse oval cavity, the spermathecal 
discs being one diameter apart . . . . . . . . . . . . probabilis,O. P.-Cambr. 
b. Vulva presenting a narrow transverse oblong cavity, the sperma- . 
thecal discs being only one-fourth of a diameter apart . ... . proxima, O. P.-Cambr. 
1. Euryopis lineatipes. (Tab. XXXVII. figg. 20, ¢; 21, 2.) 
Euryopis lineatipes, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. pp. 108, 131, t. 15. 
figg. 6, 6a-d (¢)'*, t. 16. figg. 2, 2a,b (3). 
Type 2, androtype ¢, in coll. Godman & Salvin. Total length, 9 and ¢, 4:25 millim. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith); Guatemata (Sarg!); Panama, 
Bugaba (Champion). 
