ITT 
Mello-Leitao — Sobre os Rothriuridàs Sul-Americanos 
nish yellô.w marbled with cliestiiut, the digits uníform, cheiícera like 
the palps. Sternites yeliow highly clouded with brown. Combs with 
Q to 10 lamellae in the intermediary row, perlifor /72 with 14 teeth. Telo- 
tarsus I and ÍI with two pai rs, Iíí and IV with ó pairs of lower' 
and a row of long hairs. Edge of digits with two ro.ws of smali 
granules and 6 denticules on eaeh side ; the externai contíguous to thé 
granules. 
Carapaee-trapezoidal with inside margin lightly excavated and 
posterior margin convex, very fineiy granular, shiny with a median 
g roo ve. Tubercle of the median eyes grooved, the posterior part of 
lhe cephalothorax bi-lobetl. Tergites fineiy granular and shiny, the 
last with two symmetrical posterior arches, roughly granular. Sternites 
I to IV smooth and shiny, V with the posterior haíf densely granular 
and keels-less. Tail. segment í wider tha.n long, the rem-ainder th t < 
revcrse; dorso-median keels only prescnt 011 ségments 1 to IV. Ventral 
surface of segmente 1 to III densely granular, on IV the granules are 
íew and very smali, in V there is a posterior area, granular on its, 
apical third and the posterior rim denticulate. 
Vesicle: dorsally flattened, fineiy granular on its ventral side 
with two short denticulate basal crists; the stiiig proceeds indistin- 
•guishably from the vesicle. Chelicera: fixed digit with a bifid basal and 
a sharp median tooth; movable digit with five teeth, of which the 
second basal and the apical are much the largest. 1 
Palpi smooth, without keels; tibia fusiform with two tricho-t 
bothriae; cheia of same width as tibia and movable digit larger than 
the iuanus. 
'The genus íophorus is emended and rnale S ex caracterised 
(as Penther knews only the female sex) as follows: upper surface 
of the tail vesicle excavated, presenting a shallow ellyptic pit; cheia 
with a blunt inner process at base of fingers; tarsi IV with five paird 
of ventral spines. 
A new species is described; from south Argentina. 
ÍOPHORUS EUGENICUS Sp. n.. ■ 
cf — 35 mm. 
Carapace light brown ? marbled in chestnut. Trunk with a lon¬ 
gitudinal undermarginal chestnut stripe, innerly indented, reaching the 
last tergite; at six first tergites a median pair of triangular chestnut spots. 
Outside the lateral stripes they are row of 4 little obliqúe chestnut spots, 
on tergites III to Ví. Sternites with two narrow longitudinal stripes* 
Tail yeliow, with a little median chestnut bíoich on dorsal surface of 
segments II, III and IV. Sides and ventral face densely marbled in 
