472 ARANEIDEA. 
never suspect them to be different. Amongst the numerous examples before me, 
however, from Central America, there is not a single male with the form of tibia il. 
characteristic of WV. arabesca, as pointed out by Emerton and confirmed by an examination 
of Keyserling’s types of LE. trivittata. It 1s possible that with fresh examples one 
might discover points of difference in colour which were constant. | 
6. Neoscona arabesca. (Tab. XLIV. figg. 13, 13a, 6, ¢; 14, 14a, 4, 2). 
Epeira arabesca, Walck. Tabl. des Aran. p. 63°; Ins. Apt. il. p. 74°; Abbot, Georgian Spid. 
nos. 331-346°; McCook, Amer. Spid. iii. pp. 80, 148, t. 1. figg. 8, 84a, t. 2. figg. 6, 7 (2); 
t. 1. fig. 86 (g)*. 
Epeira trivittata, Keyserl. Sitzungsb. nat. Ges. Isis, Dresden, 1863, p. 95, t. 5. fige. 6,7 (2), 
8,9(3)°; Spinn. Amer., Epeiride, p. 172, t. 8. figg. 127, 127 a, 6(?)°3; Emerton, Trans. 
Conn. Acad. Sci. vi. p. 311, t. 33. figg. 16, 16a (¢), t. 86. figg. 2, 3, 4, 5 (f),8 (%)'s 
Banks, Proc. Calif. Acad. Sci. (8) i. p. 254°. 
Type ¢, gynetype 9, of NV, trivittata (Keyserl.), in Mus. Brit. Total length, ¢ 45, 2 7:2 millim. 
$. Similar in general characters to the same sex of WV. minima, but at once distinguishable by the curved form 
of tibia ii. This segment, seen from the underside, is strongly curved, concave on the inner side, with 
two basal spines beneath, the outer one larger and curved across towards the inner side, and one outer 
marginal spine towards the base ; the central area, beneath, has no spines (thus differing also from that 
of V. minima) ; the inner side has three long spines on the basal prominence and four shorter spines on 
the basal half, beyond these is a single series of about 7 short stout spines curving upwards. Femora i. 
without spines beneath ; ii. with a series of 5 or 6 spines in the apical half beneath ; and iii. and iv. with 
a series of 5 or 6 spines beneath. The lateral spine of the clavis of the genital bulb is nearer the base 
than the apex. Coxa iv. is without a conical spur. 
9. Colour almost precisely similar to that of V. minima. The scapus of the vulva, however, presents, in all 
the examples before me, a constant difference: the base is dilated and the spatula is much narrower 
where its reflexed margins meet, while the whole scapus is slightly, but constantly, longer. 
Hab. Nort America ! 45 67,—Mexico, Guaymas, Tepic, Orizaba (jide Banks ®). 
There is nothing to show that the species identified and described by McCook as 
N. arabesca (Walck.) (=trivittata, Keyserl.) is not really identical with the original, 
and his decision on the point must therefore be accepted. 
I doubt whether it really occurs in Mexico, for out of numerous examples which 
might be taken for it, none present the characters found in the type of WN. trivittata. 
Our figures are taken from North-American specimens. 
7. Neoscona amulensis, sp.n. (Tab. XLIV. figg. 15, 15a, b, 3.) 
Type, d, in coll. Godman & Salvin. Total length 8 millim. 
S$. Very similar to NV. theis, except as regards the spinulation of tibia ii.; and differing from NV. minima in 
having the central area of the same segment without spines beneath. The spur on the clavis of the 
genital bulb is blunt, slightly sinuous, and quite at the apex. Tibia ii. beneath with three long outer 
marginal ordinary spines (no large basal or central spines), an inner marginal series of 9-10 specialized 
spines, two basal spines (these are really on the inner side of the segment), and three ordinary dorsal 
spines. 
Hab. Mexico, Amula (17. H. Smith). 
