TMARUS., 97 
middle of the ocular area until it meets the two before mentioned at the thoracic junction, are the 
brightest and best defined. The sides of the thorax are also somewhat marbled or reticulated with 
yellowish. 
The eyes are normal in general position and relative size. The four centrals form a quadrangle, whose anterior 
side is the shortest and the posterior side slightly the longest; and the interval between those of the fore 
central pair is distinctly less than that between each and the fore lateral eye next to it. 
The legs are long and slender, 1, 2, 4, 8. They are of a yellow-brownish hue, with a rather broad dark brown 
longitudinal stripe along the front of the femora of the first pair; these femora, as well as those of the 
second pair, being also marked with white along their inner sides, The legs of the two hinder pairs are 
paler than the rest, and, except for some traces of white, unicolorous. The spines beneath the tibiz and 
metatarsi of the first two pairs appear to consist of two pairs on the former and three pairs on the latter. 
The palpi are similar in colour to the legs, very short, the cubital and radial joints especially ; these two joints 
are about equal in length, the radial being the strongest, and having its outer extremity produced into a 
short obtusely pointed apophysis, and a strongish projection at its extremity beneath; the form of this 
last is not easy to make out exactly. The digital joint is of moderate size, and equal to the radial and 
cubital joints in length. The palpal organs are well developed, simple, encircled by a slender black filiform 
spine, and at their base a prominent strongish T-shaped process. 
The falces are deep yellow-brown, slightly marked in front with yellowish. They are of a subconical form, 
moderate in length and strength. 
The mawille are brownish-yellow, the labium and sternum dark yellow- brown. The sternum is of an oval 
shape. 
The abdomen is oblong, somewhat subtriangularly produced at its posterior extremity. It is of a yellow- 
brown colour, with a narrow longitudinal central, somewhat irregularly margined, cream-white band 
spotted with a darker hue on the upperside, leaving a darkish yellow-brown stripe on each side of it. 
The sides are longitudinally striated, the strie marked with cream-white lines ; on each side of the hinder 
extremity a little way from the spinners are some black markings forming a kind of short curved stripe. 
(If this spider ever had any spiny or bristly armature on the cephalothorax or abdomen it has been broken 
off, but there are traces of minute tubercles from which these may have sprung.) 
Hab. Panama, Bugaba (Champion). 
This spider is nearly allied to 7. intentus, but may be readily distinguished by the 
absence of a well-defined cream-white longitudinal band bisecting the hinder slope of 
the thorax, as well as by the structure of the palpi and palpal organs, and other 
characters. 
Tmarus studiosus, sp. n. 
Adult male, length 2 lines; adult female, 22 to 3 lines. 
The cephalothoraw is of the ordinary form ; it is of a yellow colour, rather darker and tinged with orange on 
the sides of the caput and thorax, and has a few prominent black bristles on its upperside. The height 
of the clypeus exceeds half that of the facial space. 
The eyes are normal in their general position and relative size. The tubercles on which they are seated are 
greyish-white and perhaps rather stronger than usual. The four centrals form nearly a square whose 
anterior side is the shortest. Those of the front row are separated from each other by equal intervals. 
The legs are long, slender, 1,2,4,3. Their colour is yellow, rather paler than the cephalothorax. The spines 
beneath the tibiz and metatarsi of the first and second pairs are irregularly disposed, not in the usual 
pairs ; beneath all the metatarsi and tarsi are some prominent pale slender spines somewhat regularly 
disposed. 
The palpi are short, similar to the legs in colour. The radial is equal to the cubital joint in length, but is 
stronger; it has its extremity on the outer side produced into a strong pointed apophysis equal to the 
joint in length, and with a long nearly straight tapering black spine-like process issuing from beneath its 
BIOL. CENTR.-AMER., Arach. Aran., May 1892. of 
