‘208 ARANEIDEA. 
General Characters. 
The males and females may also be recognized by the following characters :— 
A. Dorsal area of abdomen pale, with either a broad or narrow, dark, 
broken or unbroken central band. 
a‘, Central band narrow, black, continuous, extending from the anterior 
margin to the anal tubercle, becoming gradually attenuate. . . . dentichelis, minuta, 
nigropicta. 
i. Central band broader, more or less diffused over the whole dorsal area, 
though with a darker central bar; usually with a pale continuous 
marginal band, but often having only a pale V-shaped spot in front 
of the anal tubercle. . . . . . penicillata, vittata, cristata, albida, spirorbis, nigrina. 
B. Dorsal area of abdomen pale, either mottled with olive-green spots or 
with a paler, broad, central band, dilate behind, with or without a 
pair of lateral spots about the middle . .. . . ew ww oe © festiva, inermis, 
recondita, maxillosa, marmorea, olivacea, pallida. 
C. Abdomen black, with either an anterior broken or unbroken white or 
yellow band, or a pair of white or yellow shoulder-spots, of variable 
form ; followed by a continuous or broken post-median transverse bar, 
and another bar nearer the anal tubercle ; both these are sometimes 
continuous as a girdle, or broken to form an anterior pair of elongate 
transverse spots and another posterior pair of smaller spots, nearer 
together, in front of the anal tubercle. 
c’. Posterior band continuous to form a uniform pale unbroken girdle 
(in S. murcida probably sometimes broken) . . . . . . . . migriventer, murcida. 
c’. Posterior band more or less broken in front or behind, or on each 
side. 
d’, Anterior portion of abdomen with a pair of parallel transverse 
narrow white lines. . . . .. . ~ oe we we ew ew wf 6fulvoguttata. 
d’, Anterior portion of abdomen with a single continuous or broken 
pale band, or a pair of shoulder-spots. 
e’. Anterior band continuous. [Posterior lateral bands broken up 
into four small spots, the anterior pair larger.] . . . . albicincta, lutea, spiralis. 
e*. Anterior band broken in front. [Anterior lateral bands broken 
up into four spots, the anterior pair larger, transverse.] . . voluta, sulphurea, flavida. 
S. quadriguttata, conspecta, circumcincta, alacris, and brevispina stand rather apart from the 
above, while in 8. excavata and binotata the abdominal pattern has been slightly obliterated. 
1. Sidusa festiva. (Tab. XVI. figg. 1, 1a-e,3 ; 2,2a-g, 2.) 
Chapoda festiva, Peckh. Occas. Papers Nat. Hist. Soc. Wisc. iii. 1, p. 26, t. 1. figg. 7, 7 ¢, d ( 3), 
7 a, b (2) (April 1896) *. 
Type ¢, gynetype 2, in coll. Peckham. Total length, ¢ 5, 2 6 millim. 
