chamberlin: the arachnida. 207 



Genotype. — Orinonius lamprus, sp. nov. 



Apparently closest to Uloboms, a genus occurring widely in this 

 and adjoining regions as well as elsewhere. 



Orinomus lamprus/ sp. nov. 

 Plate 8, fig. \-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 

 annul i. 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 in front. Cly- 

 peus slanting ventrocephalad ; about 6qual in w^idth 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. 



