ITT 
Mello-Leitao — Sobre os Rothriuridàs Sul-Americanos 
nish yellô.w marbled with cliestiiut, the digits uniform, cheiícera like 
the palps. Siernites yeliow highly clouded with brown. Combs with 
Q to 10 lamellae in the mtermediary 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 half densely granular 
and keels-less. Tail. segment í wider tha.n long, the rem-ainder th t < 
revcrse; dorso-median keels only present 011 segments 1 to IV. Ventral 
surface of segments 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 proceech 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 ímanuSi 
'The gènus íophorus is emended and rnale sex caracterised 
(as Penther knews only the hem ale sex) as follows: upper surfaoe 
of the tail vesicle excavated, presentiug 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. 
IOPttORUS 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, 1ÍI and IV. Sides and ventral face densely marbled in 
