THERIDION. 391 
8. Theridion trepidum. (Tab. XXXVII. figg. 4, 44, 3.) 
Theridion trepidum, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 256 (2), t. 34. 
figg. 10, 10a-d(g)}. 
Type 2, androtype ¢, in coll. Godman & Salvin. Total length, 9 3°5, ¢ 2 millim. 
Carapace yellow, with a central brown forked line, but no marginal line. Abdomen with a chalky-white, 
central, foliated band, broadly margined with black in the anterior half; lateral area chalky-white, with 
a yellowish tinge; ventral area flesh-brown. Legs yellow, with a very slight dusky olive tinge at the 
apex of the femora, tibiw, and protarsi, the latter segments having also a very faint central annulus. 
“Mandibles with the usual conical spur on the outer upperside towards the base. 
Hab. Mexico, Omilteme in Guerrero (ZH. H. Smith); Guatemana, Montafia de 
Chilasco (Sarg 1). 
9. Theridion excavatum, sp.n. (Tab. XXXVII. figs. 5, 5a, 9 .) 
Type, 2, in coll. Godman & Salvin. Total length 3°5 millim. 
Carapace yellow, with a slender, forked, dusky, central line. Legs yellow; protarsi slightly tinged with brown 
at the extreme apex. Abdomen entirely covered dorsally and laterally with chalky-white, with the 
usual cardial line and the diverticula from it; ventral area dull white, with two small black spots 
above the spinners on each side, and a large, central, black blotch between the genital rima and the 
spinners. Vulva exhibiting a transverse cavity, the posterior margin produced, but not nearly so much 
as in 7’, thorellz, and with four small circular spermatheve beneath the surfuce in front. 
Hab. GUATEMALA (Sarg). 
10. Theridion vittatum. (Tab. XXXVII. figg. 6,60, ¢; 7,74, 9.) 
Achea vitiata, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 130, t. 17. figg. 11, 
ll a-c (¢)’. ‘ 
Thwaitesia vittata, O. P.-Cambr. loc. cit. i. p. 197. 
Thwaitesia lepida, O. P.-Cambr. loc. cit. i. p. 197, t. 25. figg. 5, 5 a-d (?)*. 
Types 9, of A. vittata and 7’. lepida, deuterotype g, in coll. Godman & Salvin. Total length, @ 8, 
3 4 millim. 
Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco!? (12, H. Smith); Guate- 
MaLA, Cahabon (Sarg *); Panama, Bugaba (Champion). 
No mention is made on p. 197 (loc. cit.) as to the characters wherein Thwaitesia 
lepida differs from Z.. vittata, and there is no variation in the form of the vulva. The 
differences in the coloration are only individual, such as are constantly met with in 
spiders of this group—T’ lepida being a very large and long-matured specimen, with 
the femora more decidedly annulated with black. In some examples, small and 
recently mature, the femora are either white or have an annulus near the apex. 
il. Theridion splendidum. 
Chrysso splendida, Banks, Proc. Calif. Acad. Sci. (3) i. p. 287, t. 14. fig. 138 (¢)*. 
Type; Q, im eoll. Calif. Acad. Sci, Total length 7-2 millim. 
Hab. Mexico, Tepic?. 
