32 proceedings of the natural [March, 1885. 
and fourth legs are devoid of spines, but have stout hairs on the 
femoral joints. 
The abdomen has a central longitudinal band formed of yel¬ 
lowish hairs, with a darker band on each side. The sides are 
yellowish. 
The venter is yellowish, slightly darker than the sides. 
1 he dorsal aspect of the spider presents a median yellowish 
band throughout the whole length, with a dark band on each 
side. 
Habitat. Madagascar. 
Plexippus ensifer Thorell, (Studi sui Ragni Malesi e Papu- 
am, I, p . 267), has two spines on the clypeus. This species 
ought, perhaps, to form a new genus, as it differs in several 
respects from Icius E. S.; but we think it best to form new gen¬ 
ii.i but slowly until we have made a more careful comparison of 
species. 
S ■ Total length, 5.7 mm. Width of abdomen, 1.2 mm. 
Length of cephalothorax, 3.1 mm. Coxa I 1 1 min 
Width “ “ o 
Width “ 
ITeight “ 
Legs. Fern. 
1. 
2. 
3. 
4. 
1.8 
1.7 
1.4 
1. 
u 
Pat. 
1.2 
.8 
.8 
.8 
2 . “ 
1.3 “ 
Tib. 
1.8 
1.2 
.9 
1.3 
Mctat. 
1.4 
.9 
1. 
1.1 
Tar. 
.8 
.6 
..5 
.6 
Total 
7. 
5.2 
4.6 
4.8 
dor olV T 18 m ° deratel y high, a little wider at t 
El . 6yes ’ and about twice as long as wide. The cephalic p 
occupies about K of the cephalothorax; it i Z I 
inclined, with vertical m'rW ti n . piane, ana i 
vex andT! f The thoracic P«t is a little c( 
\ex, and is rounded behind and nr, • i 
ward from n V 4 i i • . on S1( ies, slanting dov 
rvarcl Irom a little distance behind the dor«nl ,7 , Pl . , 
dark hvmvn -*i , . ie 101 sal e yes. The coloi 
on the Tor’ TT T ^ ab ° Ut the “tarior eyes a 
T T PVObably f0rm di ^inct patterns, 
rubbe 1 ff Phal0th ° raX ’ bUt m ° Ur 8 P e ® m ens are almost entir. 
