CHAMBERLIN: THE ARACHNIDA. , 207 
Genotype.— Orinomus lamprus, sp. nov. 
Apparently closest to Uloborus, a genus occurring widely in this 
and adjoining regions as well as elsewhere. 
ORINOMUS LAMPRUS,! sp. nov. 
Plate 8, fig. 1-4. 
Carapace nearly black, a narrow median longitudinal line yellow- 
ish, the clypeus also paler. Carapace clothed with grey hair. Ster- 
num black; a pale median mark. Coxae dusky beneath. First 
legs with femora, patellae, and tibiae black, with a few small light 
spots; metatarsi and tarsi yellow. Other legs yellow, with dusky 
annuli. Abdomen somewhat yellowish white, finely spotted with 
black, a dark median longitudinal line over entire length and a 
deeper, more distinct one on each side from the hump caudad; venter 
with a geminate black stripe along the middle. 
Posterior row of eyes conspicuously recurved, a line tangent to 
caudal edges of median eyes passing through the anterior third of 
laterals; median eyes three times their diameter apart, half as far 
from the laterals which are nearly of same size. Posterior lateral eyes 
as far from the anterior laterals as from the posterior medians (once 
and a half their diameter), the anterior laterals with diameter two 
thirds as large. Anterior median eyes only a little more than their 
diameter apart but more than once and a half their diameter from the 
laterals; row conspicuously procurved. Area of median eyes wider 
than long nearly in ratio 5:3; twice as wide behind as infront. Cly- 
peus slanting ventrocephalad; about equal in width to diameter of 
median eye. 
Labium wider than long; subtriangular, the sides being straight 
and meeting at an angle, (Plate 8, fig. 4). 
Sternum caudally produced as a short tongue between the separated 
posterior coxae, the tongue rounded at end. More than twice as 
wide as long (20:9), (Plate 8, fig. 2). 
Female. Length 3 mm. 
fem. tib.+ pat. met. tar. total 
Leg I 16mm. 1.6mm. 1.2mm. .6mm. 5.0mm. 
Leg Il 1.0 ileal 1 3 3.4 
Locality.— Urubamba, 9,500 feet, July. (Type, M. C. Z. 149, one 
female). : 
1 X\aurpos, distinct. 
