I TO 
Archivos do Museu Nacional — Vol. XXXIII 
border vvithin a large median fulvous triangular pateh with its base 
frontally; on the six firt tergites there is within this pateh another 
clliptically transverse, dark brown with a central fulvous spot. Ster j 
nites of uniform colour, yellowish brown. Tail yelíowish brown, reti- 
culated in black, the last segment and vesicle fulveseent; black dominates 
on the ventral surface. Legs dark brown irregula,rly marked, tarsi 
light. Palpi dark chestunt marbled with fulvous, hands mahogany colour 
with fuseous bands and uniformly coloured digits. 
The Cephalothorax with straight anterior margin with some 
hairs, the back with a longitudinal median groove whieh cotnnienees 
at a pit close to the anterior and reaching the posteior margin, forming 
a groove on the median ocular tubercle. Tergites smooth, the six first 
with a sinuous tronsversal keel close to the anterior margin; the; 
last without this keel but provided with a posterior row of granulations, 
and each side of this posterior border with two conspicuous dentieuíes, 
an obliqúe and slightly curved row of granulations starting from inside. 
Stcrnites smooth with some hairs, the last one with two longitudinal 
keels. Comb with 12 long teeth, curved; only one row of intermediar/ 
lamellae, the three basal larger ,the others regularly pearl-iike. 
Tail: Segment I much wider than long, the others increasing 
in size, V nearly equal to III and IV. Dorsal keels granular, indefined 
ou I and II, complete on III and IV, absent in V. Lateral uppe,r‘ keels 
represented in I to III by a strong apical tooth, in IV by a row of 
small granules on the posterior fifth. Ventral keels of segments I and 
lí very accentuated, with an out branehing U and posterior loop. Ven¬ 
tral surface of all segments smooth, V alone presenting some slight 
setiferous elevations. Vesicle with a dorsal groove, rough with some 
setiferous elevations. Telotarsus I with a median row of bristíes and 
the long dorsal bristíes. Palpi without keels: tíbia fusiform, the manus 
wider than the tibia Movable digit with a sinous row r of granules 
at the edge und 6 larger dentieuíes on eaeh side, distinetby separate. 
The synonymy of Urophonitis brachycentras is discussed, and 
a key is given of genus Urophonius with the description of a newspecies. 
Urophonius corderoi sp. n. 
Ç — 30 mm. 
Carapace yellowish brown marbled chestnut brown. Tergites 
chestunt with a narrow yellow median stripe and another at eaeh side, 
close to the margins; on the dark ground colour lighter irregulaij 
patehes, sometimes curved V shape {><) internally convex. Tail: 
brown irregularly marked with chestnut. Vesicle light fulvous with 
black sting. Legs light yellow; femurae with apical chestnut marks, the 
tibiae blotched, the protarsi and tarsi uniform light yellow. Palpi brow- 
