734 REV. 0. P. CAMBRIDGE ON NEW ARANEIDEA. ([Nov. I, 
joint springing from the centre of its hollow; this latter (digital) 
joint is large and of oval form, with an elongation behind, by which 
it seems to adhere to the radial joint. The palpal organs are well 
developed, but not very complex; they consist of two largish lobes, 
with one or two corneous processes or spines at their extremity. 
The falces are moderately long and strong, a little divergent at 
their extremities, enlarged or prominent in front on the outer sides ; 
they terminate with a not very strong curved fang, and are armed 
with several sharp teeth near their extremities on the inner side. 
Sternum broad, convex, heart-shaped, and glossy, furnished with 
a few longish erect bristly black hairs. 
The adult female is larger than the male, but resembles it in 
colour, excepting the dark caput, falces, and maxillze ; the epigyne is 
also of a deep reddish brown, nearly black. 
Two adult females and an adult male of this Spider were lately 
received from near Sta. Fé, Minas Geraes, Brazil, where they were 
captured by Mr. Henry Rogers. Had it not been for the excessive 
slenderness of the legs, and the distinct joint or petiole by which the 
cephalothorax and abdomen are connected, this species could hardly 
have been excluded from the genus Evigone (Savig.), to which in 
other respects it bears the closest resemblance. 
It must be exceedingly Ant-like when alive; and in general form 
it bears considerable resemblance to certain of the genus Micaria 
(fam. Drassides) ; but the difference in the form of the caput and 
other characters separate it easily from that genus. 
It is evidently allied to ‘“‘ Formicina”’ (Canestrini), but differs 
in the petiole and relative lengths of the legs, as well as in other 
particulars. 
As far as my own experience goes, this Spider is more nearly 
allied to the almost exclusively northern genus Hrigone than any 
other known tropical Spider; and possibly it may prove to be the 
type of a more or less numerous closely allied exotic group. Its 
bright colours contrasted with the black caput and tip of the abdo- 
men, together with its slender legs and waist, make it a very striking 
and pretty species. 
Noy. gen. CEPHALOBARES (xepadi, head, Sapus, heavy). 
Characters of the Genus.—Cephalothorar short, nearly round at 
its lower margins; caput large, abnormally elevated and convex, 
rounded on all sides, and projecting greatly over the falces. 
Eyes not very unequal in size, forming four pairs on the fore part 
of the caput; the four centrals form a large square, whose fore side 
is the shortest ; and on either side of the lower part of the square are 
the two lateral pairs, the eyes of each of which are contiguous to 
each other, and seated on a very slight tubercle. 
Legs short, moderately strong, not greatly unequal in length ; rela- 
tively 1, 4, 2,3; the tarsal claws three in number and very minute. 
Falces small, moderately long, straight. 
Mazille moderate in length and strength, slightly inclined to the 
