390 ARANEIDEA. 
4. Theridion electum. (Tab. XXXVI. fig. 27, ¢.) 
Phyllonethis electa, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 165, t. 20. figg. 3, 
3a-e (dg) (nec 2)". 
Type, d, in coll. Godman & Salvin. Total length 4:25 millim. 
Hab. Mexico, Omilteme in Guerrero (H. H. Smith 1). 
This spider is certainly not identical with the specimens identified by me as the 
males of 7. evexwm (Keyserl.), while the female ascribed to P. electa agrees perfectly 
with Keyserling’s species. 
5. Theridion thorelli. (Tab. XXXVI. figg. 28, 28a, 0, ¢; 29, 29 a-c, 2.) 
Phyllonethis thorellit, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 182, t. 18. figg. 1, 
la,b6(3),5,5a,6(¢)'. 
Phyllonethis adjacens, O. P.-Cambr. loc. cit. p. 166, t. 20. figg. 1, la-e (2)?. 
Type 3, gynetype °, of P. thorelli, in coll. Godman & Salvin, total length ¢ 3:25, 9 5 millim.; type, @, of 
P. adjacens, in coll. Godman & Salvin, total length 3:75 millim. 
Hab. Mexico, Omilteme in Guerrero (H. H. Sinith} ?). 
I am unable to distinguish 7. adjacens from the female of T. thorelli. This species 
is also very closely allied to T. calycinatum, Holmb., of which there are many examples 
from the Argentine Republic in the British Museum. 
6. Theridion niveum. (Tab. XXXVII. figg. 1, 1a, 3; 2, 2.) 
Theridion niveum, O. P.-Cambr. Biol. Centr.-Amer., Arachn, Aran. i. p. 255, t. 84. figg. 11, 
lla-e(g)’. 
Type 9, deuterotype ¢, in coll. Godman & Salvin. Total length, 2? 3°5, ¢ 2 millim. 
Carapace and legs pale yellow, in both sexes, the apex of the tibie and protarsi of i. and iv. sometimes black 
in the female. Abdomen in the male pale yellow, with a central chalky-white band, with a row of small, 
dull, dark spots on each side, variable in number and size, often coalescing to form a black band. In the 
female there is often a round dark blotch in front, with a central foliated and lateral chalky-white bands, 
and sometimes two conspicuous black spots in the posterior third and one above the anal tubercle. The 
coloration is, however, very variable. The mandibles in the male have the usual conical spur, but. it is 
inconspicuous in this case. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith); Panama, Bugaba (Champion 1). 
7. Theridion uncatum, sp.n. (Tab. XXXVII. fig. 3, ¢ .) 
Type, ¢, in coll. Godman & Salvin. Total length 4 millim. 
Carapace yellow, with a slender, brown, central line, forked at the base of the cephalic region, and a marginal 
brown line. Abdomen yellow-white, with four small black spots on the dorsal area, the anterior pair 
being the smaller; spinners basally suffused with black; ventral area with a black spot before the 
spinners and the epigynal area black, with an oval pale spot in the centre on the posterior margin. 
Legs yellow ; femora, tibie, and protarsi dusky at their apex. Mandibles with the usual conical spur towards 
the base on the upper outer side. (For specific differences, see Table and Plate.) 
Hab. Mexico, Omilteme in Guerrero (H. H. Sinith). 
