266 bulletin: museum of comparative zoology. 



Genotype. — Horiodenus lycosoides, sp. nov. 



Readily distinguished from Caloctenus and Odo, both occurring in 

 the Andean region, in having but a single tooth on the lower margin 

 of the chelicera, as well as in eye relations and characters of legs. 



Horioctenus lycosoides/ sp. nov. 

 Plate 21,%. 2^. 



Integument of carapace dark brown with a median longitudinal 

 yellow or light testaceous stripe from the eye-area to the caudal 

 margin; this median stripe anteriorly as wide as the eye-area from 

 where it first widens and then narrows again and remains of nearly 

 uniform width to the posterior declivity down which it narrows to 

 the caudal margin; also a narrow paler supramarginal stripe along 

 each side; carapace clothed densely with chiefly light grey or white 

 hairs, dark hairs much sparser. Sternum dusky chestnut, the labium 

 similar excepting at the tip, the endites paler, all these parts clothed 

 with grey hair like that of the carapace. Legs brown, irregularly but 

 abundantly, especially the femora, streaked and spotted with black- 

 ish; hair chiefly grey but with stiff er dark bristles more abundantly 

 intermixed than on the carapace. Abdomen with the integument 

 brown, a sagittate outline in some vaguely indicated at the base 

 above, this followed by a series of equally vague cross-marks; densely 

 clothed with grey and coarser brown hairs intermixed. 



Posterior row of eyes longer than the anterior; very strongly 

 recurved; median eyes but little larger, separated from the laterals 

 by about their diameter, only half as far from each other. Anterior 

 row of eyes decidedly recurved both in dorsal and in anterior view, 

 the median eyes being borne well forwards; eyes equidistant, less 

 than their radius apart ; median eyes smaller than the laterals (ratio 

 of diameters about as 4: 5). 



Labium clearly wider than long (23:19); sides convex, decidedly 

 converging to the roimded or mesally truncate anterior margin; 

 basal notches short, (Plate 21, fig. 2). 



Endites not impressed. 



Palpus strongly spined ; claw with five teeth. 



Teeth of upper margin of chelicera rather slender, decreasing from 



1 Lycosa, fibo%, fonn. 



