LATRODECTUS.—STEATODA. 379 
fig. 682 (9)°; Keyserl. Spinn. Amer., Ther. i. p. 145, t. 7. figg. 91, 91a-d (3$)‘; Banks, 
Proc. Calif. Acad. Sci. (3) i. p. 237°. 
Latrodectus formidabilis, Walck. Ins. Apt. i. p. 647°; Nicolet, in Gay’s Hist. Chile, Zool. iii. 
p. 460, t. 4. fig. 10 (9). 
Latrodectus variolus, Walck. (Abbot’s figs., MS.) Ins. Apt. i. p. 647°, 
Latrodectus dotatus, C. i. Koch, Die Arachn., viii. p. 115, t. 284. fig. 683 (¢)’°. 
Latrodectus variegatus, Nicolet, in Gay’s Hist. Chile, Zool. iii. p. 461, t. 4. fig. 9 (9). 
Latrodectus thoracicus, Nicolet, loc. cit. p. 462". 
Tetragnatha zorilla, Walck. Ins. Apt. ii. p. 221, t. 19. fig. 2 (¢)”™. 
Theridium verecundum, Hentz, Journ. Bost. Soc. Nat. Hist. vi. p. 280°; Spid. U.S. (ed. Burgess) 
p. 153, t. 17. figg. 1 (2),2(d)”™. 
Theridium lineatum, Hentz, loc. cit. p. 2811’; Spid. U.S. (ed. Burgess) p. 154, t. 17. fig. 3 (¢ juv.)”*. 
Total length, ¢ 5, 9 12 millim. 
Hab. Nortu America}, California .—Mexico, Ojos de Agua, Chilpancingo, Amula, 
Omilteme, Venta de Zopilote (Hf. H. Smith), Xautipa (Dugés), San Miguel de Horca- 
sitas®, ‘epic, Minatitlan, Orizaba}3; Guatemaa, Capetillo, Antigua (Rodriquez), 
Salama (Dr. Rivera Paz), Guatemala city (Sto/l); Costa Rica (Rogers); Panama, 
Bugaba (Champion).—Sovurm America, Chile‘1!011, &e. 
Notz.—Whether JL. geographicus, of which figures are given on our Plate 
(Tab. XXXV. figg. 21, ¢; 22, 2), is a small variety of L. mactans or a distinct 
species is at present doubtful. It occurs in Brazil and in the Antilles, and may 
possibly be found to inhabit Central America. | 
STEATODA. 
Steatoda, Sundevall, Consp. Arachn. p. 16 (1833) ; F. P.-Cambridge, Ann. & Mag. Nat. Hist. (7) 
xi. p. 11 (1902). 
Chrysso, O. P.-Cambridge, P. Z. 8. 1882, p. 429. 
Type of Steatoda, S. lunata, Sundevall (= Theridion tepidariorum, C. L. Koch), Europe; that of Chrysso, 
C. albomaculata, O. P.-Cambridge, Amazons. 
There is, so far as 1 can find, no reliable structural difference between the type 
of this genus and that of Theridion; but the group of species which are gathered 
round the types of each of these genera can be recognized as quite distinct in general 
appearance, and possibly when the whole of the Theridiide have been exhaustively 
compared, they will fall into conveniently distinct groups, and many others will be 
made in addition. 
Males. 
A. Embolus of palpus much less conspicuous, not prolonged into a 
convoluted spine, encircling the bulb. 
a. 
b.|Separable by the form of the embolus and conductor of the ) ¢eniata, Keyserl. 
rufipes, Lucas. 
tepidariorum, C. L. Koch. 
e.{ palpal organs . 
d. cavipalpus, sp. n. 
3 cf 2 
