VOL, 111. ] A New Jumping Spider. 335 
Female, first and second leg of a uniform light-brown with a black 
tip, light and dark hairs, sparse scale-hairs on all except first two 
joints. Third and fourth legs same with tarsus and metatarsus lighter. 
Some have a narrow dark ring on tibia of the third and fourth pairs; 
others havea dark ring on patella, tibia, and tarsus of the same. 
Palpi light-brown with light hairs. 
The markings of this spider often rub off, giving rise to individual 
differences. 
This brilliant bit of a spider is quite common about San Francisco 
Bay, but has not yet been reported elsewhere. It is found on many 
plants, but in gardens where I have observed it most, it is more fre- 
quently seen on honeysuckle, rose bushes, live-oaks, and the shrub 
known as laurestina. The last two seem to offer peculiar advan- 
tages, for not only do the leaves lie closely together, but the oak 
leaves are curled and the laurestina leaves are quite often rolled 
lengthwise. Between two leaves in the one case, or within the rolled 
leaf in the other, the spider finds a safe retreat, while the dead live- 
oak leaves, where they lodge together in hollows, furnish spacious 
cavities between them for the web domiciles. 
The domicile is a simple flat tube, open at both ends, with some- 
‘times an open branch tube from the main one. The spider enters 
by inserting the fore legs between the sheets of webbing and holding 
them apart asit forces its way in. If there is danger of intruding foes, 
the spider holds the sheets together with the fore legs at the end 
most threatened. 
The flat cocoon which contains the yellowish eggs is made within 
the tube, and the young ones share the parent domicile until after 
the second moult, when they depart on aeronautic tours of explora- 
tion for themselves. 
‘The males and females appear as adults as early as April, but the 
former become rare after the first of June and the latter after the first 
of September. The females begin laying eggs in May. The num- 
ber of cocoons made by a single female is not more than two, and 
probably, judging from captives, the general rule is to make but one. 
The eggs, about fifty in number, hatch on the average in about 
twenty-five days, and the young are found at all times of the year. 
DENDRYPHANTES NEOLUS is one of our so-called flying spiders, 
the young being especially given to that progressive method of loco- 
